This RAG AI Agent with n8n + Supabase is the Real Deal

[@PauloRicardodeSouza-f6r]

Perfect video my brother. I'm part of a large community here in Brazil and I will recommend it to colleagues. The video is so good that with my intermediate English, I was able to understand it perfectly. Thank you for this content!

[@ColeMedin]

Thanks for sharing! I appreciate it a ton man!

[@beatthetar]

Thank you for this video. I've been going through all these n8n tutorials on KZbin, and this one nailed the exact 'yeah, but' gaps I had when trying to put everything together. The memory storage, the data garbage collection-nobody else seems to go over these details, probably because they're trying to sell services to "figure this out" for you. Really appreciate you putting this info out there for everyone. You just earned a sub!

[@ColeMedin]

I'm glad - thank you so much!!

[@michael_guiao]

Totally agree on channels not talking about keeping their databases duplicate free. Thanks for showing.

[@ColeMedin]

Of course Michael, I appreciate you calling that out!

[@mahiaravaarava]

This integration of RAG AI Agents with platforms like n8n and Supabase is indeed a game changer! I love how it streamlines complex processes into manageable workflows.

[@ColeMedin]

I'm glad you found this useful! I agree it's a gamechanger - I've spent way too much time in the past building relatively complex AI Agents that I now know I wouldn't even need to code! haha

[@alex_vis_12]

Another thing I learned from your video is this: N8N has its own chatbot building system. I used Flowise for that. For me it would be interesting to see a video explaining the differences (and similarities) between N8N and Flowise in regards to AI agent/chatbot functionalities. Thanks again for the top-notch content!

[@ColeMedin]

You are welcome and thank you for the suggestion! I know a lot of individuals who love using Flowise with n8n, so I do have this on my list of content for the future!

[@blossom_rx]

I was sceptic first, as like you say: many people just talk and do not actually teach. Blessings for you and this channel. Ff you keep that up you will be successful. This was a good and clear explanation.

[@ColeMedin]

Thank you very much - that seriously means a lot! I'm glad everything was clear as well! That's actually my primary goal :)

[@e11e7en]

15:02 Thank you for the great tutorial! Definitely keep it up. In case it helps you as an educator, the Document Loader Options (15:02) were vital for the success of the tutorial, but you went past them so fast I didn't realize they were there! In any case, I learned a ton from investigating that myself, and from the tutorial in general. Again, thank you!

[@ColeMedin]

Thank you very much and I appreciate you calling that out a ton! It's important for me to not miss anything big and I agree I should have covered the document loader options.

[@mtofani91]

Man i just discovered your content. You are a gem :) Thanks. I've work and test some things in n8n few years ago, but it's great to see what it can be done RN.

[@ColeMedin]

Thanks dude, that means a lot to me! That's awesome you were testing things out with N8N even a few years ago. I didn't even know about it back then!

[@IanChard-o1k]

oh my days dude you have really REALLY sorted me out with this vid. So grateful.

[@ColeMedin]

Haha I'm glad to help man! Thank you!

[@bobsov534]

Great walkthrough. For next topic, it will be cool to show a custom react application where chatbot is hosted and connected to n8n behind the scene. The file uploads, processing all that smooth connection that can be shown.

[@ColeMedin]

Thank you and I appreciate the suggestion! I will certainly be extending this with a frontend in the future, probably with React!

[@AndrewsPanda]

I second this. A video for a react front end would be amazing

[@CameronGolinsky-op1et]

This is a really thorough walk through for documents. How would this be altered if you were wanting to embed database data from a table? This is where I keep running into problems... I really love the enthusiasm and clarity you share with each video! Thank you for all the value!

[@ColeMedin]

Thanks Cameron, I appreciate it a lot! Great question! There are a lot of ways to embed a table. The easiest way would probably be to turn the data into a CSV and split the CSV into chunks (making sure to not split in the middle of a row) and ingest that into the vector database. Another option is to ingest each record or a set of records as raw text into the vector database. Hopefully that helps! What problems specifically have you run into?

[@CameronGolinsky-op1et]

@@ColeMedin Thank you so much for the reply. This might seem very long and like i am taking advantage of your generosity of time. I need two tables. One table that essentially would house my company wiki database (each row is it's own article, persay and thankfully this has been able to be sent one row at a time via webhook), and then another that would hold the extracted data from supplementary pdfs and documents. The idea would be that if the wiki table doesn't have the answer, the bot could then search the supplementary table. The problem I'm running into is that when I follow the steps of your video, the table is saved as documents and will then only ever try to search a table called "documents" (even if it is renamed). If I add another table, no matter what I set the vector store as, it always looks for "documents". I was able to get some SQL code that created more tables and gave me some new functions, but no matter what, N8N will just try to look in "documents" and will say my new functions failed. I'm considering moving to pinecone or something else, but the idea of using postgres was very appealing. I fully support the work you are doing and am certain the best is yet to come!

[@ColeMedin]

Of course and no worries, I'm glad to help! Your use case sounds awesome and it's definitely something you could accomplish with n8n and Supabase. It's hard to be concise in explaining this, but essentially you would replace the RAG tool I have in the video for the agent and replace it with two n8n workflow tools that would each search a different table with RAG given a query. So you would instruct the agent to use the workflow that queries the wiki table first, and if it fails to find the answer then call the tool to query the supplementary table. Does that make sense?

[@TheThickPizza]

This is a great resource. Thanks for posting! One suggestion I would make is to add descriptive chapters. I find I have to seek around a bit to get to the parts I need.

[@ColeMedin]

Thank you and I appreciate the suggestion! I've been doing it for my more recent videos, but I honestly should go back and do it for this video. I'll be sure to take care of that!

[@TheThickPizza]

@@ColeMedin Thanks! I just came back to the video to double-check something and having the chapters was super helpful.

[@pumpituphomeboy]

Amazing video Cole. This video is in a different league to the vast majority of other so called content creators who are more about getting clicks for headlines. They nearly ALWAYS show workflows that are missing the small details needed to create a real-world production ready agent. Subbed and liked. Looking forward to future content from you.

[@ColeMedin]

@@pumpituphomeboy Thank you very much, that means a ton! That's exactly what I'm aiming for - hitting the small details that make all the difference :)

[@Flo-bk3fj]

nice! one pumpit... xD

[@unitedweb6059]

Super high quality content. Unlike the rest, this really helped. Thanks for sharing.

[@ColeMedin]

Thank you, that means a lot!! My pleasure :)

[@discotek1198]

man, thank you! new subscriber here. Keep doing great job. You have a special gift and your videos are pleasure to watch.

[@ColeMedin]

Wow thank you so much for the very kind words! You bet man!

[@MichaelSmithsav]

This was a really good tutorial. You delivered everything you promised, it was easy to follow and beats the hell out of the RAG agents I've built in the past. Thank you.

[@MichaelSmithsav]

How would you set up the initial vector database with recursive uploads of files from Google Drive Folders to be inserted into the vector database? This would give you access to your existing files and then updates as everything is updated over time. Would be super useful for things like Standard Operating Procedures.

[@ColeMedin]

Thank you Michael - that means a lot!

[@ColeMedin]

This is a great question! You could create a separate n8n workflow that you run once that would go through all the folders in the Google Drive you want and index them into your vector DB. That's definitely doable with n8n. Then going forward the workflow I show in the video would handle new files or updated files. The other option is you could create a new folder for RAG that you use in the workflow, and then just copy your SOPs or other files from wherever else you store them into your new folder for RAG (then potentially delete the original copies after). Not an ideal solution if you don't want to shuffle things around but that would be the quickest!

[@DatNguyen-br3qd]

brother, you are the best of all KZbinr about this n8n

[@ColeMedin]

Thanks man - that means a lot! :D

[@howardwong2181]

Thank you for demonstrating a no-code RAG implementation. It's quite impressive! However as some of the comments mentioned local RAG is a realistic requirement due to security concerns. However for a true real world rollout, there's going to be a need for a guardrail framework tied to role-permissions, and a test framework for validating expected / unexpected outcomes and I believe that will inevitably lead to a code-based implementation. For now, the n8n platform is great for prototyping different backends / engines. This was inspiring nonetheless!

[@ColeMedin]

Thank you Howard! You make great points! For a lot of applications, there truly is a lot that goes into making them production ready with all the security/testing requirements. n8n is suitable for some applications (such as many website chatbots), but others you are right in saying the requirements will often lead to the need for a coded solution.

[@quercus3290]

your embeddings are everything, if your embeddings are chaotic and of poor quality this will greatly impact outputs.

[@ColeMedin]

Yes very true! I honestly should have focused on the embeddings even more here!

[@quercus3290]

@@ColeMedin would make for a good video in of itself, not many people seem to want to explain how embeddings are created, how you can manage them or what the implications they can have for your outputs.

[@ColeMedin]

Yeah definitely - thank you for the suggestion! I have it in my list to create some content around more advanced RAG techniques. Embeddings are necessarily advanced but it does fall under the category of going into something specific to RAG in more detail!

[@bluegreen-ai]

Excellent video. Great job, you have spotted a perfect example and the realization is very well executed.👏 Why do you need to connect the RAG AI Agent for the Postgres chat memory using the Postgres while you use the API connection for the document insertion ? How can I better understand the steps and choices you took for the chunking part ? Could you briefly explain when your method is relevant ?

[@ColeMedin]

Thank you - I appreciate the kind words! The Postgres chat memory is separate from the document insertion (which is for the knowledge retrieval). The chat memory is there so the agent can remember previous messages in the conversation. The document insertion and the Supabase documents table is there for the agent to be able to search across your documents to answer a question. The reason the chat memory and document insertion use different credentials is mostly because the Postgres chat memory in n8n can use any Postgres database - it doesn't have to be Supabase. So those credentials are more "generic" to a Postgres database, while the credentials for RAG are specifically for Supabase. I hope that makes sense! For chunking, a lot of it just comes down to playing around with the chunk and overlap sizes to figure out what works best for your use case! There aren't too many rules to follow there. I just 1000 for my chunk size just because that's a default used in a lot of applications.

[@bluegreen-ai]

@@ColeMedin thank you for the precise answers. It seems easy when YOU say it !!

[@ColeMedin]

Haha of course!! Let me know if you have any more questions!

[@redneq]

We need to focus on Localization of RAG and creating STACKS to host/use locally for the utmost security. Let's not forget you're training theses companies data for them by sending all your content into cloud services.

[@ColeMedin]

Great point! I definitely want to work towards making more content around localizing the entire system. Local setup is a bit more involved for things like the database which is why the full stack isn't local at this point, but I agree fully local is ideal!

[@redneq]

@@ColeMedin While I'm a bit looney, using Redis, Ollama, Postgresql, n8n in a compose file setup properly could achieve exactly this though right?

[@ColeMedin]

@@redneq I haven't fully attempted or seen this built out before but yes this would be possible! And you certainly aren't loony haha, this sounds great and I know it's what a lot of people are looking for. Lot I'm working on behind the scenes related to local RAG!

[@Flo-bk3fj]

@@redneq I do this every day, every nigt when i have time besides my fulltime job.. and what you will expirience is. That it is not building the prncibles and showing a bit nonsense, it is the companys data. You must show up with a solution for the real problem, its the data! This advice here shows just that he has just no idea of what hes doing.

[@yashinfinite8338]

Awesome observation

[@brilliantexperience]

Hi Cole, I got this working with your JSON file in minutes. Thank you for the detailed step-by-step instructions on getting APIs and SQL codes setup! Q: How can I make this just search one or a few documents from the database?

[@ColeMedin]

You are so welcome, nice job!! Could you clarify your question? For RAG it will only retrieve the documents you ingest into the vector DB. You could use metadata filtering to filter down on the documents you want to search. A lot of how that would work would depend on your use case and setup though!

[@abrahamroa118]

Very good video, great for when you think about moving into production. Thanks for sharing.

[@ColeMedin]

Thank you, Abraham - my pleasure!! :)

[@cubeddu]

Question: Why don't you make the id in the table documents in supabase be the Google sheet id just change the id to be uuid instead of int8 that way you can remove that step of deleting and inserting the document ... supabase trigger will get called on update too. If you match the IDs this way you can reduce the step and avoid dupes and making sure that when the user is chatting if the document was deleted they fall into that inconsistent behavior as the document might not be there as it got updated and in your current flow you have to delete and insert in between these operations there can be hiccups. btw this is awesome, Most videos about n8n aren't well thought out and you cover a lot. I think this is the best way to get non tech and tech people into RAG! Plus automation, agents all the way.

[@gypsypvp]

having trouble changing the int8 to uuid in supabase, saying "cannot cast type bigint to uuid".. Got a fix?

[@ColeMedin]

This is a FANTASTIC question, I appreciate you asking it! And thank you for the kind words as well! The reason I don't do what you're describing is simply because of a limitation with n8n. When you insert documents into Supabase for RAG with the "Supabase Vectorstore" node, there isn't a way to customize the ID of each record to make it correspond to the Google sheet ID. At least not that I have found. So this approach with the metadata is the way to work around that in n8n. I also really wanted to demonstrate a use case for metadata since it's a really important topic for RAG so it worked out well that this workaround was necessary. If you coded this solution yourself, then what you are proposing would be a very good approach.

[@e11e7en]

Perhaps I'm not understanding the suggestions, but with this suggestion, for longer documents which get chunked, wouldn't a single Google document ID be associated with multiple chunks? And wouldn't that be a problems because the Supabase ID needs to be unique for each chunk. Perhaps you could append the Google Doc ID to make it unique (e.g. {googleDocID}-{uniqueNumber}; then you could have access to the Google Doc ID. But this all depends on being able to manage the Supabase ID.

[@saxtant]

So it turns out, your context window is the same with or without rag according to Claude, which means all rag can do is help you choose your context segments that will be handed to the llm in text format for content larger than the context. I don't really need rag, I just need a method to isolate segments from my total context related to a particular query and then use the reduced context for it, this is a little slower, but it's going to better than rag at choosing segments. Don't pay for databases, you have a specialist at your disposal, use them.

[@ColeMedin]

Yes that is true that RAG is "just" a way to get specific context into the LLM from a knowledgebase and it doesn't actually extend the context window of the LLM! RAG is one of many methods to isolate segments from total context as you mentioned, and is generally considered the best/easiest to implement option. I'm curious to hear more about what exactly you are thinking of implementing. Sounds interesting!

[@saxtant]

@@ColeMedin I don't need an LLM to be a knowledge base, databases or even text files are much better at being accurate. Where LLMs are useful are being an interface to a database, my path is to create tools that can be 100% accurate rather than super fast, because of 2 main reasons, 1: agents will destroy themselves and do so far too easily because they don't really know where they messed up, even if they only do it 1% of the time, agents feeding off themselves will accumulate errors more than a quantum computer. 2: inference speeds will continue to become faster, so agents should spend a few more turns on verifying their every move when they interact with deterministic tools like a database, then you can leave them to complete a large task and not have it produce unusable garbage. Well, that's the plan anyway.

[@ColeMedin]

@@saxtant Yeah I see where you are coming from! How would you handle a large amount of unstructured data though? If you have a bunch of let's say meeting notes or standard operating procedures, it would be hard to get an LLM to query for those in a SQL database or text files without having RAG to do a similarity search and pick out what matters for the user question. What are your thoughts there? I'm really curious to know!

[@saxtant]

@@ColeMedin I would prefer not to let it get that far, I mean it's true my house is a complete mess, but I would prefer not to have a large pile of unstructured data and actually I don't, I may not have the same requirements as others, but my current method is all about having an LLM actually use a scratchpad for unstructured data, only for it to be sanitized in the background and removed from the scratchpad to keep the context small.

[@lancerben4551]

I'm working very hard to do exactly this. I made a script I call context manager which serves to create the memory of the LLM for a specific task. I'm working with large modules and applications. The context manager basically parses my code and then I select which part of the code I want to send to the LLM to reduce hallucinations and increase coherence and increase the accuracy of the response. My goal is to have this context determined by an AI that will read the script and select which part of the code are relevant to include in the coding LLM 'a context. The goal is to separate task on different calls as the more specific the question is and the more focused the context is better is the response. So far I'm doing the context creation manually which is of course a pain. I think. I'm getting close to getting it to work. The biggest issue I have is that LLM are incredibly inconsistent even with ultra clear instructions. Claude which is by far the best I've tried for coding does not follow instructions well. I get more structured responses from GPT4o latest but it is not on the same level as Claude for coding tasks. I'm also working on an auto merging software that takes the code output and parses it for commands. Which then the program uses to accurately merge the code snippet into the original. I use LibCST for the operation. I'm Getting close to getting it work correctly but still lots of little kinks to fix. Anyone working on this who wants to collaborate I'd be interested. Btw I'm not a programmer I'm an engineer with a knack for creation and understanding complex things. I rely on AI to write code. I am managing it and figuring out the problems and explaining it how things should work. So a talented coder could really help advance the project.

[@artemazing]

I've watche a lot of videos about n8n agents - most of them bs that has no real application for business. But your video and blueprint is totally gem! tysm

[@ColeMedin]

Thank you, that means a lot to me!! I'm glad what I have here has real business application for you 😄

[@MrDonald911]

Good content but the only way to say whether this is a good RAG system is to evaluate it via a metric like RAGAS. Any RAG system will spit out content. At this point as an AI engineer I expect all RAG videos to include an evaluation so that we can see how good it is at retrieving content and how reliable the content retrieved is. good luck !

[@ColeMedin]

Thank you and that's a very fair point! I appreciate you pointing out something that's missing in a respectful way. Honestly I would love to have some sort of evaluation in the video but I wanted to keep it concise. I will definitely be thinking of how I can incorporate that in future videos though without making it too much longer!

[@howardwong2181]

I believe that's entirely based on the embedding model and LLM- which you can easily swap out.

[@mediapixelbr]

Comrade, you really are fantastic with N8N! I really appreciate you sharing your knowledge here on YT. Another "follower". Congratulations. I am from BRAZIL

[@ColeMedin]

Thank you very much, that means a lot to me! 😃 I'm jealous you're in Brazil! Where I'm from (Midwest in the US) it's starting to get cold...

[@gadevanggag]

Hi Cole. Awesome video! Much appreciated. I have built an AI Agent using Langflow (and Astra DB), and I did not take into account the issues you pointed out in this video (specially redundant data with scalability in mind). One question I have: I have some pretty complex documents that includes pictures/graphs/tables and I am looking for a solution that includes the information from those. Is this possible and how complex is it to set up in n8n?

[@gadevanggag]

Hi again. I actually found one of your videos answering my question - thanks pal. Best of luck!

[@ColeMedin]

Fantastic, you bet!!

[@ryudswift]

now im interested, which video specifically?

[@AutoMateLabs_br]

You're my HERO!!! Thanks for this Masterclass!!!

[@ColeMedin]

Of course, I'm glad you found it useful!! :)

[@breakoutgaffe4027]

Great video! Realistically though, is this going to work as a chat bot for web app with (potentially) thousands of users?

[@ColeMedin]

Thanks! Yes but you'll have to have a large instance to handle the load to N8N!

[@koalahbh]

HI Cole! Thank you very much for the video and the detailed explanation, I was able to implement it here in minutes! But I have a question, and when the file inside the folder is deleted, is this action considered in the "Updated file" node?

[@ColeMedin]

You are so welcome, I'm glad you have it implemented! A deleted file won't trigger the file updated trigger, unfortunately. That's a limitation of N8N I hope they address soon since you have to create a custom webhook using the Google Drive API to actually watch for file deletions.

[@HenrykAutomation]

Hey mate, nice vid! I was waiting for something that will show me how to use n8n for my use cases. Do you think Supabase is better than Qdrant? From your video it seems you like it because you can keep track of the conversation history without needing something extra like MongoDB?

[@ColeMedin]

Thanks Henry! Yes, that is one of the big reasons I picked Supabase over Pinecone or Qdrant. It's nice to not have to have one platform for the conversation history and another for RAG! On top of that, Supabase makes it really easy to look at my knowledgebase in a tabular view which I can't do with non pgvector implementations.

[@HenrykAutomation]

@@ColeMedin Yeah noticed that view as well. Super cool. Do you have the possibility to see the vectors within each document upload? I think the dream would be to have a solution, where you could just have everything within on platform. That would be money for sure.

[@ColeMedin]

@@HenrykAutomation Yes you can see the vectors for each document chunk in the Supabase table as well! I agree that's the dream, and it seems like Supabase is the right direction.

[@alvaroaraujo7945]

Hey, Cole! Amazing video. I've been working on my version of it. Quick question: I'm doing your workflow, but the original data for vector database is a CSV doc (an employees database)... So, I did a vector database where the batch size is 1:1 (each row became a row), to avoid breaking employees in pieces (lol) However, thus far, the vectors that are showing up in the file retrieval are presenting sub-par quality, where they are related to my query, but not enough. So.. 1) How would you set this up (in matters of parameters like batch size, files number etc.) 2) why is your retrieval files number = 4?. In my case, I've noticed the model is omitting/ignoring important stuff when I leave any value under 24... which is sad in a token expenditure perspective lol Anyways, thanks in advance. good day

[@ColeMedin]

Thank you very much and great questions! So the ideal setup depends a lot here on what kind of queries you want to make. RAG is really good at looking up specific employee records (example: "What is John Doe's salary?") but it is not good at answering questions that would require it to have the entire CSV in its context (example: "What is the average salary of all employees?"). This is because RAG will only have part of the CSV in its context unless you set it up to retrieve the entire document. If the CSV is small enough (rough estimate < 10k characters) you could just not chunk it at all when putting it in the knowledge base. That way it'll pull the entire document to answer questions. Otherwise your idea of one employee per record could work or you could do something like 10 employees per row. My retrieval is 4 because that is pretty standard when your chunk size is something like 1000-2000 characters and you want the RAG solution to lookup very specific information. But this is one of those parameters that you just have to play with a lot! That and the chunk size. The bigger the chunk size, the more information will be available with a smaller retrieval number. So maybe it has to be larger than 24 for you because your individual records are so small (since it's one per employee)?

[@alvaroaraujo7945]

@@ColeMedin thank you. really complete answer, right here. That makes sense. I’ll test that number higher. My automation has been working good so fine, with 70+ employees

[@ColeMedin]

Glad it makes sense! And that's awesome!!

[@leoplaysnotmuch]

How did you do this? I am trying to change the chunk to match my row, but I don't know how.

[@alvaroaraujo7945]

@@leoplaysnotmuch under the document loader you have the “character splitter node”. I’ve set it to as high as my row can get (you can change from characters to tokens). Just make sure your rows aren’t too huge (mine with 1k tokens average are doing well)

[@jorgeferrari2491]

Greate video, thank you for share. Regarding, vector data base, do you suggest some self hosted solution?

[@ColeMedin]

Thank you, you are welcome! For self hosting a vector DB I'd recommend either Qdrant or self-hosting Supabase and using PGVector.

[@MartinCooney1]

great video, subscribed. i'm always looking for interesting n8n tutorials. Pity I'm using Groq at the moment so no idea how to do an Embedding tool with that. Maybe it's in the works

[@ColeMedin]

Thank you Martin! Groq is a fantastic product for LLMs! For embeddings, it is too bad you can't use Groq for that - but you can use Ollama or HuggingFace in n8n if you want to stay open source for the embeddings!

[@misheltal692]

Great Content! Can you make a tutorial about how to make agent that can be database manager ? Gives info to client, update record, and more for business?

[@ColeMedin]

Thank you!! And I actually am planning on making a video like this already! Are you thinking this agent would create custom queries to manage the database, or more just call tools that already have queries defined to perform certain actions? I am thinking of doing both but curious what you had in mind!

[@justosoleno5009]

Hey Cole, I have a question regrading the aplication of this to a multi-tenant database where each tenat should have its own rag for its docuemnts. Is this posible? BTW great video!

[@ColeMedin]

Thank you very much! And great question! It is hard to get into this in great detail in a KZbin comment, but you can easily do multi-tenant RAG using metadata filters within a vector DB. With metadata filtering you don't even need a separate index per tenant, though you can do that too. So basically the tenant ID (or company/customer ID, whatever you call it) will be a part of all requests into these workflows. Any inserts into the vector DB will have the tenant ID included in the metadata. Then any retrievals from the vector DB for this tenant can simply filter on the tenant ID in the metadata to guarantee that it is only retrieving information for that tenant. Let me know if this makes sense!

[@DonFinley]

Curious on the google drive node, is there a way to monitor subfolders? The google drive nodes both have this call out, "Changes within subfolders won't trigger this node" In other news, great video and thanks for sharing.

[@ColeMedin]

Thank you Don and great question! That is correct that the Google Drive trigger node doesn't watch subfolders. If you want to monitor subfolders, you could set up triggers for those specific folders as well. Obviously that's only realistic if you don't have dozens of subfolders. The best way to handle this without creating a trigger for each folder would be to use the Google Drive "Changes" API. You can basically tell Google Drive to alert you when a file is created/updated within a folder or your entire Drive by sending a request to a webhook which could be an n8n workflow (with a webhook trigger). This method does handle subfolders! So if you're really curious about extending this I would take a look at the Changes API!

[@DonFinley]

​@@ColeMedin Thank you, appreciate the help. I was able to work with the Google Drive search node, triggering the path every 15 minutes and searching for any files that have been modified in the last 15 minutes with this query: modifiedTime > '{{DateTime.now().minus({ minutes: 15 }).toUTC().toFormat("yyyy-MM-dd'T'HH:mm:ss'Z'") }}'

[@alex_osti]

Great work, Cole! Thank you for sharing.

[@ColeMedin]

Thank you Alex, my pleasure!!

[@gabrielzambrano772]

Bro doing God's work out here

[@ColeMedin]

Thank you Gabriel!! haha

[@MattDoman]

🙏🙏🙏🙌🙌🙌

[@zensajnani]

love these videos thank you for the value!

[@ColeMedin]

You are so welcome!!

[@ramstein74]

Great video. Just subscribed

[@ColeMedin]

Awesome, thank you very much! Glad you enjoyed it :)

[@jackmermigas9465]

super stuff man! I am using self hosted n8n and don't have postgres chat memory option. I think I'm on the latest version 1.47.0 is this something you need to install? Also there is no retrieve documents option off rag agent. When I copied your file these 2 parts were broken. Are you using cloud version?

[@ColeMedin]

@@jackmermigas9465 Thank you! That is really strange. I'm also self hosted and did not have to install anything extra for postgres chat memory or document retrieval. It honestly seems like something is off with your installation... Is it self hosted with Docker or did you use NPM? I'd love to try to help you get it working!

[@jackmermigas9465]

@@ColeMedin Thanks for the response, I'm on Render + Supabase installation. Is the latest version upto 1.58 now? Is that your version?

[@jackmermigas9465]

I figured it out I was on an old version 1.47 and didn't have docker image set to latest! Now on 1.58 and everything is showing correctly thank you!

[@ColeMedin]

Okay sweet, yep!!

[@regisaabh]

Hi Cole, do you know if it is possible to output a summary of the chat interaction? I wonder, for example, if I could add another AI assistant in this workflow to do that at the end of the chat iteration, but I don't know how to do that without screwing up the current workflow.

[@regisaabh]

Probably would be better if I simple extract the chat history and sent it out of the workflow and then create another one to do that. Just don't know how to extract it and send it out. Any idea?

[@ColeMedin]

Great question! So the chat memory is stored in the Supabase database so you can extract all the messages out based on the current session ID!

[@amineamaach4450]

Hey Cole, you forgot to mention that pgvector extension needs to be enabled to work with embedding vectors in Supabase. Thanks,

[@ColeMedin]

Thanks for pointing that out! PGVector is actually enabled as a part of the SQL script that I show how to run within the Supabase platform. But I certainly could have called that out more clearly!

[@alphaleakswithavb]

Great tutorial! Ironically, I've been stuck for a couple of days on the google drive authentication. Not able to connect n8n with google for some reason :/

[@ColeMedin]

Thank you! I'm sorry you're having issues with the Google Drive authentication? What is the specific error message you are getting?

[@alphaleakswithavb]

@@ColeMedin I believe the error was with the app being on Testing mode, it didn't allow any OAuth to proceed (contact developer - kinda funny when you are the 'developer' haha). I was able to troubleshoot by adding the email manually to google console, I guess whitelisting it for Oauth login while is Testing. I tried switching the app to Live mode but it required google review and approval, etc.

[@gtrusler]

Hey Cole - quick question... any chance you could describe the schema for the n8n_chat_history table? I could guess, but I'd rather not if I can help it. I was able to get the schema for the documents table by pausing the video and zooming in, but the n8n_chat_history wasn't shown. Thanks!

[@ColeMedin]

Great question! So N8N creates the n8n_chat_history table by itself which is why I didn't cover the schema. So I'd run the workflow to create the table and go into Supabase and take a look - it'll be set up for you automatically!

[@gtrusler]

@@ColeMedin I wondered about that but I must have screwed something up. I appreciate the response.

[@ColeMedin]

You bet!

[@rodillo]

Hello, excellent video! I'm having trouble extracting text from the file. I don't know what encoding it uses because the output is unrecognizable characters, so it's not possible to store the vectors. Any idea?

[@ColeMedin]

Thank you! What file type are you trying to extract from?

[@rodillo]

@@ColeMedin Hi mate, thanks for your quick response. I have already identified the problem. The issue is that this workflow only recognizes files created within Google Drive using Google Docs, as it converts Google files to text format using Drive Download. If you try to upload files externally to the folder, Drive Download cannot correctly convert the binary file to text. The solution is to remove the Google document conversion and add a switch at the start that routes the workflow to "Extract from file" nodes based on the file type. For .doc and .docx files, I routed them to a web service running Apache Tika, and through an HTTP Request node with a PUT request, I send the file and receive the text in XML format. Now, the idea is to figure out how to filter the characters inside the text chain or use another solution that allows me to convert the .doc or .docx file into another format like .txt. That said, your video has been very inspiring, and I appreciate you taking the time to share this information. New sub here!

[@AstroB1259]

This is a great and a detailed tutorial on using n8n for RAG. I noticed that although I add files to the google drive directory the app is monitoring, it still won't fetch those docs for the RAG part. Any idea why this might be happening

[@ColeMedin]

Thank you man, I appreciate it! That's strange n8n isn't picking up on new files in your Google Drive... is your workflow switched to active? You'll have to toggle it to active in the top right of the workflow view to make the Google Drive triggers work! I'd also double check and make sure the triggers are set to use the same folder you are adding files to.

[@AstroB1259]

@@ColeMedin Thank you. It seems like it is not triggering on pdf files, just google doc files, I ended up adding a new text extraction for the pdf but that didn't work either. Maybe you can look into this in the future, unless if I am the only one having this issue. Thanks again for the great content

[@ColeMedin]

Interesting... the file type shouldn't change how well the trigger works! I'll have to look into it and test it out myself. And my pleasure :)

[@AbdulrahmanHariri]

Thanks for the video. For the Supabase retriever node in n8n, is there way to specify additional filters (like a tag) to get documents within that tag or is that something that needs to be done in the match function within Supabase?

[@ColeMedin]

My pleasure and good question! You can filter on a tag or any kind of metadata within the Vector Store node you attach to the retrieval tool. It's the only additional option in the vector store node (at least for Supabase) when you click on "Add Option" in the bottom middle.

[@n8n-io]

Love it!

[@ColeMedin]

Thank you very much!!

[@franchutee5675]

For some reason, the agent prioritizes the memory and does not use the documents with the tool. When I remove the memory, it uses the documents tool perfectly. I don’t understand the logic behind this. This is the system message: You are a personal assistant responsible for answering questions using a corpus of documents. Before stating that you do not know the answer, you must use the 'documents' tool to search for relevant information in the vector store. This search should be your primary action every time you receive a question, unless it is absolutely clear that there is no useful information available. Always respond in Spanish. This version emphasizes the necessity of using the specified tools to ensure thorough document searches.

[@ColeMedin]

Interesting... I didn't run into this issue myself for this setup but I have had this happen with RAG agents before. This is especially common with models that aren't as powerful, so the easiest thing to try is to use a more powerful model if you can. Like try GPT-4o instead of GPT-4o-mini if you're using that. Also I'm curious - what kind of conversation did you have with the agent where the memory and knowledge base would have conflicting information? Is it because you added a document to the knowledge base half way through the conversation? Sometimes you have to restart the conversation when there is new information in the knowledge base, because the LLM doesn't necessarily understand that new info is available which is why it can resort to what it said earlier in the conversation.

[@lucasazevedo7053]

i struggle with the exact same problem, have you found a solution for this? I'm using mistral-large-latest model. When i clean memory, it call the tool just fine, but the second question it doesn't call the tool

[@Oliv-i2h]

Thanks for the video ! I believe your workflow has a problem, but you did not run into because your document is split in only one chunk. Indeed, if the doc is split in multiple chunks, the delete node runs multiple times and the download node runs multiple times as well (and so will the rest of the workflow, leading to duplicates in the DB). Checking the option "Execute once" is not an option if we want to maintain the capacity to handle multiple files at once. Would be happy to have a workaround that 😁

[@ColeMedin]

My pleasure, and thanks for raising this! I think you might be right, but I'll have to test it! Regardless, the workflow triggers per document that is created/updated even if they are created within the same polling minute (there would just be multiple executions at once) so you actually should be able to check the "Execute once" option.

[@Oliv-i2h]

@@ColeMedin Thank you for your quick feedback ! You're making a good point. In my case though, I want to maintain the possibility to deal with multiple docs at once (as I want to trigger manually not auto). I will keep investigating around that 😀

[@ColeMedin]

Ah okay that makes sense! I believe there is a way in n8n to merge multiple output items into one. That way you can take all the records that are outputted from the Supabase delete node and combine them so you aren't running the rest of the workflow multiple times.

[@iotgen278]

Thanks for the great video. can Qdrant or Chroma be used locally instead of hosted Supabase?

[@ColeMedin]

Thank you!! And n8n doesn't support using local vector DBs, although you can use a hosted Qdrant vector DB with n8n! If you wanted to use a local vector DB in the workflow, you could host it on the same machine that your n8n is self hosted on and then create a custom code step to work with the local vector DB.

[@vhater2006]

thanks for sharing keep it up 🤓

[@namanpatel985]

Why supabase? what is benefit of supabase vs postgres? In this video not using any advance auth mechanism to validate user and I believe same can still be done with Postgres, right?

[@ColeMedin]

Supabase is running Postgres under the hood! It's just super convenient compared to hosting Postgres yourself and it has features like authentication and row level security for expanding this solution.

[@jubinroy4987]

Can we have a bunch of videos teaching maybe Devops or docker kind of stuff after which we can put together stacks like this 😊

[@ColeMedin]

@@jubinroy4987 I appreciate the suggestion! I haven't thought too much about making content around AI devops besides this but I really like the idea so I'll seriously consider it!

[@chip902]

How would you recurse through a single Google Drive directory? I'm doing a nightly sync with my local Obsidian vault and I'd love my AI Agent to get really smart on my years of notes

[@ColeMedin]

Great question! You can create a separate n8n workflow to scrape through an entire Google Drive directory pretty easily! I might be making a video on that in the future, but essentially in n8n you can set up a workflow to list all files in a directory and then in a loop go through each one and add it to the knowledgebase similar to how I do it in the video!

[@sohail789]

Please create a video that we use all open source and setup locally

[@ColeMedin]

I do actually have a video out already where I have a similar setup that is fully local! kzbin.info/www/bejne/jJCTlYF7Yq1lndk

[@marcosbeliera1]

You are the man!

[@ColeMedin]

Thank you Marco :D

[@lucasazevedo7053]

Hey Cole, Great video! I just have one question, it looks like the atribute "file_id" isn't getting uploaded on my supabase table on the column metadata. I get only "loc" > "lines" > "to": "from": "source": and "blobType": No file_id, and it makes the expression to delete duplicates not working

[@ColeMedin]

Thank you! Sorry you are running into that! Make sure you are including the file_id in the document splitter node! I would download the workflow JSON I link in the description and check that out. It's the node below "Supabase inserter" node.

[@moses5407]

GREAT tutorial. How can this be modified to work with pdf's?

[@ColeMedin]

Thank you!! I haven't tested this with PDFs specifically myself but others have and this should work already for PDF documents! Otherwise, there is a specific "Extract from PDF" node in n8n you could use. So you could add a condition to the n8n workflow that routes to the regular text extractor when the file is not a PDF file, and route to "Extract from PDF" when it is.

[@moses5407]

@@ColeMedin Thanks for your reply and, again, for the great tutorial. I'm going to get this installed today or tomorrow and will try pdf's and let you know.

[@ColeMedin]

@@moses5407 Of course and that sounds great!

[@NishanthA32]

For anyone else wondering about this, here's how I was able to implement it: I set up an IF node after the download a file node with this condition {{ $binary.data.fileExtension }} = pdf - If True, it'd go into the extract pdf text node followed by a Set node, that takes the extracted value and saves it to data. It connects to the "insert into supabase" node. - If False, it'd flow normally, into the extract document text node

[@e11e7en]

My workflow appears to only be triggered by the most recent file that was created. That is, if 2 files are uploaded between trigger events, Only one of those files will be added to Supabase. So, if your trigger runs every minute, and you exceed a file-upload rate of 1 file/minute, files will not be added to Supabase. Have you tested this scenario and ruled it out as a flaw in the workflow? I'm unable to overcome it with this current setup, as I understand it, at least.

[@ColeMedin]

Okay I did some more testing with this and right now the workflow does only handle one file being uploaded/updated at once within a minute. If you do more than one within a minute, it will trigger the workflow only once but there will be multiple items there - so you just have to loop over them to process them and index them.

[@ryudswift]

For those that have used this system and are considered new, maybe this will help you too. Vectorization Error: I got an error with SupaBase at the bottom part of the workflow. I first could get the connection to work, there was simple naming issue -I didnt know but used chat GPT to help me out. When I got it working it had another issue, something about the 'embedding size' so looked it up and followed the same sequence. troubleshooting. Basically it said to alter the table from (1536) to (3072). I'm not sure if others using this has come across this yet.

[@ColeMedin]

The embedding size you need depends on the embedding model you are using! It's 1536 if you are using the small embedding model from OpenAI.

[@pablovvick]

Thank you for the video. What wasn’t clear to me, and I would like to know before starting with this tutorial, is whether any of the documents I would upload are analyzed in the cloud or if everything is processed locally, including the database or even when the AI responds. Is everything done locally? I’d like to apply it at work, but there are certain privacy requirements that demand everything to be on-premise.

[@ColeMedin]

My pleasure and I appreciate your concern! This is not running entirely locally. The LLM I use is GPT, and I use the cloud (managed) version of Supabase. However, you could easily make this entirely local if you want! You could run the LLM yourself with Ollama (something like Llama 3.2 11b/90b) and then host Supabase yourself for the DB. And then n8n is self-hosted in this video so that is already local. I have a video on my channel where I show a similar setup that is entirely local! kzbin.info/www/bejne/jJCTlYF7Yq1lndk

[@pablovvick]

@@ColeMedin Thank you so much!

[@ColeMedin]

Of course!

[@ralpdexter8675]

Hi Cole, I have another question, if the meeting note becomes multiple chunk of vector, I've noticed that under N8N they are not passing the metadata back to the model so the issue here is that the AI model won't know which meeting date is the chunk coming from since it's stored under metadata. The alternative in my mind right now is by just storing the meeting summary as a vector and not the whole transcript to optimize the token, include the meeting date and other info in the summary content, and then store the summary into just 1 chunk (1 chunk per meeting summary) Keen to know your thoughts. Thanks!

[@ColeMedin]

Yes you are right here, and I love your thoughts for an alternative! This is one of the common pitfalls with RAG in general where if a chunk of text is retrieved from in the middle of a document, the LLM doesn't necessarily know which document it is from since only the first chunk would have the title. So I like your approach to keep it all in one chunk per meeting note! Another option is to prefix every chunk with the document title. That would require a more custom implementation though since you can do that by default with the vector document inserter node in n8n.

[@ralpdexter8675]

@@ColeMedin Thanks Cole, I just tried both of your suggestions, both worked

[@ColeMedin]

Awesome, I'm so glad to hear!

[@0xh8h]

I did not understand the purpose of n8n in this whole picture. Can I do it without n8n? Is there an alternative to n8n? Just want to see clearly where n8n fit in this picture

[@ColeMedin]

Great question! So n8n is what allows you to create this entire setup without having to code anything. The alternative to n8n would be to create this AI agent using Python and a library like LangChain. I do have a lot of content on that kind of thing as well! Or if you want other no code workflow automation alternatives to n8n, you could use Zapier or Make.com. But those are super expensive so I'd recommend n8n for sure!

[@siddhubhai2508]

At intro he said most golden lines and my most frustrating point in my mind, you won't be believe I gave my 5 days but I didn't got a proper perfect way to implement that in real life as most of them are carrying the paid promotions and use that promotions in the project which frustates me and then some are of poor quality, my gosh!!!!! And if you find a way then it works only for personal use, when it comes to the production ready build, all fails.

[@josemadarieta865]

well done. subscribed

[@ColeMedin]

Thank you very much!!

[@Antonio-hx6vw]

hi @Cole thanks for this workflow I'm wondering is it possible to receive some sort of notification if there is no answer in the documents so I can see this request and later improve docs

[@ColeMedin]

Yeah you could! Basically you could tell the LLM to output something specific when it doesn't get any documents, and then have a part of the N8N workflow send a notification when that happens.

[@santiagocastrovilabella6723]

Isn't this workflow always overwritting the database (every one minure) since the File Created tool is always downloading the LAST file created? Great work by the way. Thank you.

[@ColeMedin]

Thank you very much! And no, it only polls for new files that are created every minute, meaning it won't run every minute unless a file was created in the last minute (and it can handle multiple files uploaded within a minute too). I hope that makes sense!

[@santiagocastrovilabella6723]

Nice! Thats exactly what I wanted to hear :) thank you!

[@들레민-o2d]

Hi =) 🎉 good contents! But it seems to work for updating file only, is that right? It could be done for all of the exsting files? 😮

[@ColeMedin]

Thank you!! Yes, this is only for files that are created/updated once the workflow is set up. But you can create another workflow in n8n that will get all existing files from a Google Drive folder and put those into the knowledge base! Basically you would create this workflow, run it once to add all existing files, and then not need it again.

[@regisaabh]

Basic question, but the chatbot is consulting the database from Supabase Vector Store or from the file in Google Drive?

[@treefreezoner]

I think the file from Google Drive was used only once to create the vector embeddings that were stored in the vector index. As you make a question, the AI agent would parse your prompt, and search for a vector embedding that has a similar value of what you asked for in your prompt. I'm also new to RAG, so I can't be 100% sure of what I just said. It seems that's what happens in there for me. If I'm wrong, please let me know.

[@ColeMedin]

@treefreezoner is totally right! Thank you for the response and good question @regisaabh!

[@hajduadam]

Hi Great video. For some reason supabase does not create the documents table, and i get an error message from the Delete Old Doc Rows node saying Bad request - please check your parameters column n8n_chat_histories.metadata does not exist. What could be the issue? The rest of the nodes are seems to be working.

[@ColeMedin]

Thank you! Sorry you are running into this issue though! The documents table isn't created by itself, you have to follow these instructions: python.langchain.com/docs/integrations/vectorstores/supabase/ For the delete old docs node make sure the table is documents and not n8n_chat_histories!

[@hajduadam]

@@ColeMedin Legend, thank you for helping out!!!

[@ColeMedin]

You bet!

[@nmana9759]

Do you insert the doc file manually to Supabase or you did via the chatbot? I did not see that step

[@ColeMedin]

The documents are automatically ingested into Supabase when they are created or updated in the specific Google Drive folder that my n8n workflow is watching! So nothing has to be done with the chatbot itself. That is done in the bottom part of the workflow where the two workflow triggers are "File Created" and "File Updated".

[@nmana9759]

@@ColeMedin It works now by executing the given SQL code, thank you!

[@ColeMedin]

@@nmana9759 awesome, of course!

[@mayurdotca]

World is crazy. 15 mins to search through all my PDFs.

[@ColeMedin]

Indeed! 😃

[@annasc8280]

Great! Thanks a lot!!!

[@ColeMedin]

Thank you! My pleasure 😀

[@gjsxnobody7534]

have you tried larger files? like a PDF that is 500kb or larger? My setup seems to choke on that in the embedding ollama part. I can have multiple small .doc files no problem.

[@ColeMedin]

I have tried and have experienced the same thing before! Typically that means you need more memory on whatever instance you are hosting N8N with.

[@Jonzybeatz]

thanks for the video. I would like to analyze PDF studies of several hundred pages and make summaries to extract insights. The problem is that I can't copy/paste the pdf into GPT because it goes beyond the context window. Can I use RAG to do this use case? The RAG seems to be designed more for answering specific questions from a knowledge base than for synthesizing documents.

[@ColeMedin]

You bet! You are right that RAG is meant more for answering specific questions. To summarize very large PDFs like what you are trying to do, I would suggest having the LLM summarize something like 5-10 pages at a time, and then have a final prompt where you combine all the summaries together and ask it to make a final summary.

[@PressaDigital-Cortes]

I think RAG AI is really good with a small volume of data, like a 10-page PDF. However, when moving to something more serious, like over 50 pages and about 20 tables in a file, it doesn't respond as well. I'm referring to a file with more than 2,000 lines

[@ColeMedin]

Yes you certainly aren't wrong! There are a lot of factors that determine how well a RAG system performs, like the embedding model, the LLM model to handle retrieved chunks, your chunk size, how you split up your documents (especially for things like tabular data), your use of metadata filters, etc. A lot of advanced RAG techniques can be used too like reranking, hybrid search, knowledge graphs, etc. All of this becomes a lot more important once you have a lot of files or very large files like you are saying!

[@akshpatel8]

This is a great video, but I am facing an issue. I want to upload docx and pdfs. I already can do pdf uploads by using Extract from Pdf node, but for wordx it has been a hassle trying to figure this out. IF you can help with this that would be great. How can I extract text from docx.

[@ColeMedin]

Thank you! Sorry you're running into that issue though. It seems n8n doesn't support docx by default unfortunately, so you would have to convert it to a Google doc or text format (something like that) first.

[@robottalks7312]

what to do when n8n is locally hosted what should be the app domain for google cloud?

[@ColeMedin]

Great question! When you have n8n hosted locally, you'll have to set up a domain and SSL certificate to be able to use Google since Google won't work with localhost unfortunately. I would suggest hosting n8n on a VPS using a service like Digital Ocean! n8n actually has great documentation on hosting in DigitalOcean: docs.n8n.io/hosting/installation/server-setups/digital-ocean/

[@arielpascua5165]

Can you make a video on Langchain, Supabase and n8n integration

[@ColeMedin]

I am certainly going to in the near future! n8n actually uses LangChain under the hood for their AI Agents, so this already is a LangChain + Supabase + n8n integration! I'm assuming you mean with code instead of n8n though?

[@0xh8h]

+1 on this. So n8n can be categorized as “orchestration tool” like langchain or LlamaIndex?

[@MattDoman]

Thanks!

[@ColeMedin]

Thank you so much for your support!!

[@AlfredNutile]

Just curious why you did not use the Supabase node for the memory connection over the Postgres node? Thanks for the video!

[@ColeMedin]

You are welcome! Maybe it's new but I'm not aware of a Supabase node for memory, but the Postgres node can be used to connect to a Supabase DB like in the video!

[@AlfredNutile]

@ ah ok so it is not some query but an actual node that uses Postgres connection the right way that makes sense.

[@RookieKiwi]

question, instead of using openai api is it possible to use ollama?

[@ColeMedin]

Great question! Yes - you can set up Ollama with n8n really easily since it's one of their chat model options! All you have to do is select the chat model on the AI Agent node, choose Ollama from the list of models, and then give the endpoint URL of your self-hosted LLM. docs.n8n.io/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.lmchatollama

[@shihfamily4301]

HI, thank you for your great tutorials first. However, I've tried to import your workflow json file but never success. Neither using self-host n8n nor n8n cloud. Any suggestion for fixing the issue? Thank you.

[@ColeMedin]

My pleasure! Sorry you are having trouble importing the workflow though! What is the error you are getting?

[@shihfamily4301]

@@ColeMedin Thanks for your replay. I've tried to import your "Supabase_RAG_AI_Agent.json" and "n8n_Workflow_RAG_AI_Agent.json" and both were showed "Could not import file: The file does not contain valid JSON data."

[@ColeMedin]

That's really weird... I tested it myself and it is working. Are you self-hosting n8n or using the cloud n8n?

[@samsweeney-l3x]

Hello, is there a way to make the Google Drive File Updated Node to get all file updates rather than just the most recent one. I made changes to two of my files, but only the most recent one is recorded (and the others are missed). Again, the same for file created, if I put 5 new folders into my folder (that i am watching with the trigger) it will only pick up one of then. Thanks for the great videos

[@ColeMedin]

Great question! So when multiple files are updated within the same minute the workflow actually triggers once with multiple files as inputs. So you have to change up the workflow to loop through all the files passed in! You can set up a "loop" node at the beginning of the workflow and the rest can be essentially the same.

[@aicentaur]

🎯 Key points for quick navigation: 00:00:00 *🚀 Introduction to RAG AI Agent* - Discusses limitations of existing RAG tutorials and introduces a more robust solution using n8n and Supabase, - Highlights the ease of combining n8n and Supabase for a production-ready, cost-effective RAG AI agent. 00:01:10 *📚 Demonstration of RAG AI Agent* - Shows the initial setup of the RAG AI agent with an empty knowledge base, - Demonstrates adding a document to the knowledge base and querying it. 00:04:03 *🛠️ Building the RAG AI Agent* - Provides a step-by-step guide to setting up the RAG AI agent using n8n and Supabase, - Mentions the availability of a GitHub repository for easy setup. 00:05:13 *🔧 Setting Up Supabase* - Explains how to set up Supabase for chat memory and vector database, - Details the credentials needed for integration with n8n. 00:06:33 *💬 Configuring n8n Workflow* - Describes the n8n workflow setup, including chat triggers and AI agent configuration, - Highlights the use of GPT for the chat model and Supabase for chat memory. 00:09:12 *🗂️ Managing Knowledge Base Updates* - Discusses handling file updates and preventing duplicates in the vector database, - Emphasizes the importance of deleting old vectors before inserting new ones. 00:11:06 *📂 Google Drive Integration* - Explains integrating Google Drive to manage document updates and additions, - Details the process of extracting text content from documents for the knowledge base. 00:14:07 *🧠 Finalizing the RAG AI Agent* - Summarizes the complete setup of the RAG AI agent, - Encourages further enhancements and customization for better performance. Made with HARPA AI

[@ColeMedin]

Thank you for this!!

[@JosefMaxHajda]

great video! Thank you so much. I have some questions though :) Does this also work with PDF? From the Step "download files" I get the impression it is just for google drive filetypes. Exactly in this step I get the following error when putting a load of PDFs in the google drive folder: Multiple matching items for expression [item 0] An expression here won't work because it uses .item and n8n can't figure out the matching item. (There are multiple possible matches) Try using .first(), .last() or .all()[index] instead of .item or reference a different node. Any Idea what this is? So far my supabase database is completely empty. no change no matter if I put one PDF or 30 in the folder When I just let it sitting there it ran again 4 minutes later with only one item from drive with an error in "insert into supabase". unfortunately for some reason it will not open the node to tell me the error .... If I can find it, I will send it as another comment I am running a docker installation on a Synology NAS THANK YOU SO MUCH!

[@JosefMaxHajda]

well it just says internal error...

[@JosefMaxHajda]

alright. when I create a google drive text file and execute the steps manually it works. I have now my first element in the database of supabase. I guess it is just not made for PDF files... So I need to find a way to convert PDFs to Google Drive Docs. You don't happen to have a workflow for that, do you? :D

[@ColeMedin]

Thank you Josef! This workflow doesn't inherently work with PDFs unfortunately. However, you can make it work with PDFs pretty easily! There is a specific "Extract Document Text" node in n8n for extracting PDFs. So if you add the "Extract Document Text" node, there will be a list of file types and PDF is one of them. You'll just have to route the workflow to that node when the file type is PDF, and the other extract node when it isn't. I hope that makes sense! You could also convert the PDFs as you mentioned in your other comment, but it's probably a lot easier to not have to!

[@JosefMaxHajda]

@@ColeMedin hello there :) Indeed I created a separate WF for just converting PDF to txt. I now have a folder in my google drive which is called "PDF Converter" and contains an input and an output folder. so this solution is fine. Had some problems with some documents which contained non unicode signs... and for some reason the WF does not start for me.... so if I put something in the google drive folder I linked in your workflow it just does not start... I have to start it manually. I start, it processes one document, I stop it, start it again etc. until all documents are done.

[@ColeMedin]

@@JosefMaxHajda Sounds like a good solution! I'm sorry the trigger isn't working for you though... Is your workflow toggled to "active" in the top right of the builder?

[@gazorbpazorbian]

this only needs to be able to connect it to a local LLM like lmstudio or ollama

[@ColeMedin]

You can actually connect to a local Ollama LLM inside the n8n workflow! It's one of the supported options when you select the chat model for the n8n Tools Agent. All you have to supply is the local URL (localhost + port) that the LLM is running on.

[@iany00]

Why not use Qdrant instead of Supabase? Supabase is better?

[@ColeMedin]

Good question - both are great! I prefer Supabase in use cases like this because it's a nice open source platform that also has a SQL DB (used for chat memory) and authentication along with PGVector for RAG. Qdrant is just a vector DB.

[@YouCanDoWeb]

I got this to all work but it only works for one pdf in the folder it ignores the others.. what am I doing wrong?

[@ColeMedin]

Did you upload them all at once? This is a simple workflow that only handles one upload at a time. But you can implement a loop to handle multiple file uploads at once if you want! The workflow doesn't need to change much, just adding a loop node.

[@AutoMateLabs_br]

HELP ME COLE!!! I'm struggling with my Rag Agent because it seems like he doesn't like to work that much... Despite de retrieval process brings excellent information to the agent, most of the times he answers "I don't know". There's a "default" system prompt for the Retrieve Documents LLM that says: "..if you don't know the answer, just say that you don't know" and I think he is taking that tip really serious. How can I face this problem???

[@ColeMedin]

Interesting... so you're seeing that the right document chunks are retrieved from Supabase but the LLM still says it doesn't know the answer? I'm curious which LLM you are using. I've seen it a lot with less powerful LLMs that it will have the right context and still think it doesn't know the answer. I'd try gpt-4o or Claude 3.5 Sonnet and see if that helps. Otherwise, sometimes starting a new conversation can help because the LLM gets into a weird loop where it constantly thinks it doesn't know anything.

[@werneylima6172]

At 9:29, you didn’t actually explain how to fill in the information for the Postgres chat memory node. At an earlier point, you entered Supabase and accessed the database and API sections and said we would need that later. Later, you accessed the Postgres chat memory and said that you had already shown how to configure it when you showed Supabase! Basically, you said: we will need this later, and when the time came, you said you had already explained how to set up the node earlier! And I couldn’t fill in the information for the node because there wasn’t actually that explanation in the tutorial, especially regarding the password.

[@ColeMedin]

Shoot I'm sorry! The password will be your Supabase DB password you get in the database tab in the Supabase settings. You set the database password when you create it in Supabase.

[@hajduadam]

Can you make a video how to talk to a postgressql db?

[@ColeMedin]

Great suggestion, I appreciate it! I'll be making more SQL AI agent videos in the future and this would be a great addition to what I've been thinking!

[@hajduadam]

@@ColeMedin Can't wait mate! Great videos.

[@ColeMedin]

Thanks man!

[@jackmermigas9465]

How can we setup so you can add pdfs, excel files, different types of files and have it extract them into text to be able to be embedded? I tried using a switch but it won't accept any schema from the binary files. Any ideas?

[@ColeMedin]

Great question Jack! This would involve a bit more of an in depth flow where you would add branching to your workflow based on the file type. I've done this before with n8n so I know it's pretty easy to set up. Basically you would add an "if" (router) node to your n8n workflow. If the file type from the Google Drive trigger (you could use the mimeType property) is a PDF, then you would route to a "Extract from PDF" node, if it's an Excel file, you would route to a "Extract from XLSX" file, etc. If you click on the "Extract from File" node in n8n you'll see a list of options that includes these. Then you have all of those separate "extract from file" nodes route back to the rest of the workflow that handles the extracted text. Hopefully that all makes sense!

[@digitalmole8236]

My metadata is not mapped into the Supabase vector store. So things like file_id do not get added to every chunk that's uploaded. This means every time a file is updated it's still creating duplicates because there doesn't seem to be any way to add the file_id metadata to the text chunks - please can you help em resolve this. thanks

[@ColeMedin]

Sorry that's happening! I'm guessing the file_id addition isn't included in the document loader node in the workflow. I would download the workflow JSON I have and take a look at that! That's the node connected to and right below the Supabase inserter node.

[@gjsxnobody7534]

what's the difference between supabase in this video an your postgres video? which one is better?

[@ColeMedin]

Could you clarify what you are asking? Do you mean Supabase versus Qdrant for RAG?

[@gjsxnobody7534]

@ sorry, I thought supabase and postgres are competitors. And you made 1 starter video with Postgres and the other with Supabase. Maybe I’m asking the wrong question. Mainly I want to know which Chatbox plugin I can use in WP to interface with N8N

[@ColeMedin]

Supabase is actually using Postgres under the hood, so they are not competitors! And could you clarify what you mean by your second question?