Django Relationship models

Welcome to chai aur code, a coding/programming dedicated channel in Hindi language. Now you can learn best of programming concepts with industry standard practical guide in Hindi language.
All source code is available at my Github account:
github.com/hit...
Our Open-Source Project is here: freeapi.app
Join me at whatsapp: hitesh.ai/what...
for community discord: hitesh.ai/discord
Instagram pe yaha paaye jaate h:
/ hiteshchoudharyofficial
HTML video series: • HTML and VSCode - gett...
Complete javascript series: • Javascript for beginne...
Complete Reactjs series: • React JS roadmap | cha...
Javascript and react interview series: • 1 call se shuru hui pl...
Backend development with Javascript: • Javascript Backend Roa...
Python Series: • Python series launch |...

[@chaiaurcode]

Docs for this video: docs.chaicode.com/relationships-and-forms/ Course: courses.chaicode.com/learn

[@nonstopcodingcodewithadity8238]

hi sir plz request hai 99 kar do comment target or 150

[@binauralbeats-relaxingmusi4336]

sir ye series kab tak complete hoga and isme total kitne video honge?

[@thekids525]

@@binauralbeats-relaxingmusi4336 aaam kho aam ki goothli na gino

[@ananya__f]

give us 9th tutorial. continue the series please

[@bhaveshkarnewar719]

ON DELETE CASCADE is used to specify that when a row is deleted from the parent table, all rows in the child table that reference the deleted row should also be deleted. This is useful for maintaining the integrity of the database.

[@informationtech-musa]

Thank you for the info.👍

[@zuhaibmirza4320]

38:47 sir debug chahiye aap jaise detail me padhate ho waise hi achha lagata hai please don't change your teaching style even if zyada views na aare ho ya reach ok mil ri ho kyunki detailed videos ki hamesha zarurat rahi h❤❤

[@amitsangwan446]

Hitesh Sir + Chai aur Code per Django Series + Explanation in Hindi Ye hai perfect combination

[@nonstopcodingcodewithadity8238]

Bhai or comment karva do

[@MarriumNaseem]

Finally, I found a series where I can learn from scratch and practice at the same time. I never comment on online videos, but this one deserves a shot (not just because the instructor asked for comments). Thankeww :)

[@keenzeen]

I was able to solve many problems only because there is documents. Kudos to you sir!!🙏🙏🙏🙏

[@jankipatel118]

I love how you show all the error that you actually face in-between... that same as real situation .. i can connect and feel good thank you so much

[@khanhuzaif4986]

after having your docs website i can say proudly ki, programming now being indianized, thanks sir for such a valuable docs it helps us alot in our development work.

[@CodingBRO]

Sir, please don't get demotivated if you don't get enough reach. I know it's hard to stay consistent. I will try my best to comment on and share every Django video. Sir, you're doing the best job. I cannot trust anyone for Django videos except you, sir. I blindly trust you, sir. I know that you will definitely complete this series, and I will always support you, sir. Stay motivated, sir. We students love you.

[@linuxmio]

Thank you sir .......... In Django, the CASCADE option is used in foreign key relationships to specify that when a referenced object is deleted, all objects that reference it should also be deleted. This is a powerful feature for maintaining referential integrity within your database.

[@TSSsniper]

#Assignment: Cascade/cascading in DBMS: So basically when a row is deleted from a table and if some other tables are related to that particular table, then their data has to be deleted as well, to maintain the Integrity of the Data stored in DB. mtlb agr parent table ka data delete kia toh child tables ka data bhi delete ho jayega, to maintain integrity of the data. mtlb ek tarah se Domino effect ki tarah h.

[@DeepakSinghKetheth]

I had to complete a Technical Assessment for a job interview, came here. A good kick start ! Thankyou sir !

[@abhisheksharma10600]

Guys please comment target pura karo, this is the least we can do to appreciate Hitesh sir. Thanks a lot for Django series sir

[@rajniagarwal8572]

Bhai mane kar diya bhot sare comment aap bhi karo

[@tuhinjamal6221]

sir you made Django easier. your teaching technique is awesome and lead us to dive into deep. thank you sir.

[@abhijitpradhan7860]

11:00 "cascade" refers to a specific set of actions that are triggered automatically when an event occurs on a referenced row in a parent table. It is often used in the context of referential integrity constraints, specifically within FOREIGN KEY constraints. The two most common types of cascade actions are ON DELETE CASCADE and ON UPDATE CASCADE.

[@carzone003]

CASCADE ka mtlab databases mein hota hai k jab ek parent record (jaise ek table ka row) ko delete ya update kiya jata hai, toh us par dependent child records (dosre table mein jo us parent record se related hain) ko bhi ussi tarah handle kiya jata hai.

[@MuhammadJunaid-ci5rw]

Sir Your all videos helps me to motivate and full confidence and this Django series is one of best series whenever I found so far Thanks you soo Much sir I Think paid courses mn bh itna Full in depth bahut rarely sikhaya jata hy but You are an actual Teacher and well guider 😘😘

[@serpentinagaming5920]

We need debugging details on the go , please keep it , and the most interesting is as you gave the relation between the code with different files , I love it , it's really helps me to understand how all are interconnected , thanks 😊

[@nature09997]

In databases, **CASCADE** is a rule used in foreign key constraints. It automatically updates or deletes related records in child tables when a record in the parent table is updated or deleted.

[@pramodky]

awesome, Aaj achhe se samajh aya relationship, Debuging se hum logo ko bhi Idea milta hai error ko kaise fix kiya jaye, Aap se request hai ki debuging part ko edit na kare. Thank you

[@hakoonamatata11]

"On delete cascade" is a SQL command used when connecting multiple tables using foreign key. When a data from parent table is deleted, the child tables can break but cascade commands prevents it from breaking.

[@lipikagupta4378]

Sir, This is really an amazing course. You are teaching very well. I could not find any free or paid course like this. Please, don't stop making videos.

[@hassanghani8039]

CASCADE in SQL is used to simultaneously delete or update an entry from both the child and parent table. The keyword CASCADE is used as a conjunction while writing the query of ON DELETE or ON UPDATE

[@shyampatidar6642]

CASCADE in SQL is used to simultaneously delete or update an entry from both the child and parent table.

[@AbdullahMubeenA.M]

Thank you for making the documentation so easy to read and learn from. I really appreciate your efforts.

[@AshutoshRaj-ns4vy]

Cascade: Specifies that if an attempt is made to delete or update a row with a key referenced by foreign keys in existing rows in other tables, all rows containing those foreign keys are also deleted or updated.

[@CodingBRO]

plz everyone do comment on every video of django so that we can get full series, this is how we can show our gratitude towards sir.

[@informationtech-musa]

I really enjoy when show us how to debug a specific error. It helps a lot.

[@pronitparida6786]

Debugging Code is just part of development process, seeing you working on it gives us an idea how does debugging the code works. I get such type of bugs even in small projects i build.

[@billiondollarofficial]

I always have respect to my friend who suggested your main channel Hitesh Choudhury back in 2022 Now from Hitesh to Chai aur code Thank you Sir My favourite line is-"Hey there everyone Hitesh here"

[@nonstopcodingcodewithadity8238]

It's me?

[@ArbazSiddique-ki4cp]

Cascade delete is used to automatically delete related data. When a record in a parent table is deleted, all related records in the referenced child table are also automatically deleted.

[@rajuxz1]

I am a Django + .Net developer, learnt 1 year ago. Built some projects but due to some reason I had to shift to .Net . But I love coding in Django tho. I have strong foundation of python and Django but still following Hitesh sir's course. I really struggled learning it. Thanks a lot for this sir.

[@ZuhaibMirza-c2r]

12:41 Cascade, when we use it when the parent it will delete the children automatically i.e. when we delete a data all the data that is referenced to it will be deleted

[@MuhammadAfaq-c1y]

I have seen and studied a lot of Indian teachers but you are the best sir, keep it up❤love from lahore Pakistan

[@SaiSreeRamChavali]

The on_delete=models.CASCADE part means that if an Chai instance is deleted, all ChaiReview instances related to that Chai will also be deleted.This industrial practice is used for data integrity , Ensures that there are no orphaned records in the database.

[@PavanPatil-rw1je]

hell mene 20 bar ye vidio dekha hai aur bhot kuch sikha parha hu thank

[@samimanvar8248]

Using models.CASCADE ensures that your database remains consistent by automatically removing dependent records that should not exist without their parent record. This helps maintain referential integrity and prevents orphaned records.

[@adnanaliSDE]

CASCADE effect specifies that when the row of parent table is deleted the row from child table that references the row From parent table be deleted. Example: If you delete a chai On delete CASCADE on ChaiReviews will delete all the ChaiReviews associated with that chai

[@aakashchauhan5459]

ON DELETE CASCADE is used to specify that when a row is deleted from the parent table, all rows in the child table that reference the deleted row should also be deleted.

[@PersonalMobile-w4g]

CASCADE: When we set the on_delete parameter as CASCADE, deleting the reference object will also delete the referred object. This option is most useful in many relationships. Suppose a post has comments; when the Post is deleted, all the comments on that Post will automatically delete. We don't want a comment saving in the database when the associated Post is deleted.

[@utkarshsingh1128]

23:00 Admin panel for models (creating classes in admin) 34:30 Sorting issue

[@meetshihora]

mene pura youtube chhan mara lekin Django ka best containt nahi mila ae best hai sir

[@learner9-b8w]

The best part for me is the error debugging so don't remove that part sir keep introducing us to new errors every time.

[@ashishtiwari-ee2mm]

sir ji, chai aur docs me kya use kiya hai apne next js ya django, bahut khoobsurat and clean banaya hai

[@nature09997]

Sir your lecture is enough for learning and we dont go anywhere to learn Django

[@jankipatel118]

Thank you sir it is perfect series for starting learning Django

[@siddharthraturi4151]

One of the finest series of django i've ever seen , loved it sir !!

[@raj.indian72]

Please hitesh also build websocket based projects in django your teaching skills are very unique 😊 I am so thankful to you.

[@kaushikdey9404]

The debugging sections really help a lot, sir

[@crown8887]

Finally abb mai apne projects me models sahi kar paaoo ga..❤❤thanks alot sir ji..

[@HandsomeMoves]

Django me "models.CASCADE" ka matlab hai ke jab aik model (parent model) ka object delete hota hai, to us se related doosre model (child model) ke saare objects bhi automatically delete ho jate hain. Yeh ek foreign key relationship ko define karte waqt use hota hai. Detail Explanation Foreign Key Relationship: Django me "ForeignKey" aik field hoti hai jo do models ke darmiyan aik relationship banati hai. Yeh field ek model ko doosre model ke object ke sath link karti hai. models.CASCADE: Jab aap models.CASCADE ko aik ForeignKey me use karte hain, to iska matlab hai ke agar parent model ka object delete ho jata hai, to saare child model ke objects jo is parent model se related hain, wo bhi delete ho jate hain.

[@jr.devasana]

Actual seekhne ko to debugging me milta hai. Agar concepts and flow sahi karna hai to errors achy hi hai.

[@sagarghosh2897]

ye wala comment target kuch zada hi jaldi pura ho gaya. jokes apart, Sir you keep providing and we will keep supporting.

[@Vandita940]

😅vo Mane karvaya tha

[@sagarikasahoo1044]

Thank you for sharing the docs as well! They are so much helpful!

[@lolf390]

Yes please keep teaching us how to debug and fix errors as well

[@virajchavan2210]

Thanks for the django series, please keep the debugging in the videos. It helps us a lot.

[@anonymous-hf9ju]

love the debugging process please continue to show us

[@JashanpreetSingh-j7m]

38:40 ji sir bilkul , debugging part hona chahiyie , true learning vhi se ati h

[@sagarikasahoo1044]

Sir you made Django easier!! Thank you so muchhhhhh!

[@bhabanisankarnayak75]

35:51 sir please ese hi debugging part ko rakhiye... It's very useful for beginners like me

[@pushparajmehta]

I have learnt js and react from you your content are always great and this django series is mind blowing ❤

[@awesome-kartikey]

11:32 Cascade in Database In a database, a CASCADE is a referential action that occurs when a row in a parent table is deleted or updated, and the changes are propagated to the child tables that have a foreign key relationship with the parent table. This ensures data consistency and maintains referential integrity. Operations CASCADE supports two primary operations: ON DELETE CASCADE: Automatically deletes the child table rows when the parent table row is deleted. ON UPDATE CASCADE: Automatically updates the child table rows when the parent table row is updated. Example in Django Blog Code Suppose we have a Django blog application with two models: Post and Comment. A post can have multiple comments, but a comment belongs to only one post. Python from django.db import models class Post(models.Model): title = models.CharField(max_length=200) content = models.TextField() class Comment(models.Model): post = models.ForeignKey(Post, on_delete=models.CASCADE) content = models.TextField() In this example: Post is the parent table. Comment is the child table with a foreign key post referencing Post. on_delete=models.CASCADE specifies the CASCADE action. When a Post is deleted, Django automatically deletes all associated Comment instances due to the ON DELETE CASCADE action. This ensures that we don't have orphaned comments without a parent post. Similarly, if we update a Post instance, the changes will be reflected in the associated Comment instances due to the ON UPDATE CASCADE action. By using CASCADE, we maintain data consistency and ensure that the database remains in a valid state.

[@AcezeroGame]

Great day to learn. Love from Nepal 🇳🇵 ❤️

[@KukuG28]

Never found a better series on Django than this in Hindi.

[@MukeshKumar-nn4nq]

CASCASE : Its actually a database feature and django build on the top of it , this actually means deleting the object that associated as foreign key as soon as data deleted. I know english itni achi nhi hai , toh example de dete hai. insta post delete k saath sare comments bhi delete ho ja rhe hai. Shayari terms mein : "Hum to dubenge sanam tumko bhi le dubege" Nahar mein nahaane ke terms mein : "dubta aadmi bachaane waale ko bhi le dubta hai"

[@TechAlgorithms]

Excited for upcoming video lectures

[@k.chetankumar6533]

Sir aap bas video bante raho... Hum target complete karte rahenge

[@nonstopcodingcodewithadity8238]

😅😅thx bro

[@Kumar-tz5qh]

01💯tahnku sir pls aur video bnaiye sir

[@GyanendraSingh-rz4ej]

Sir, your series are very good and another level. Thank you a lot Sir.

[@kotlashashank4767]

Hello Hitesh sir! plz don't cut the debugging part in video. I like to see the how you fix the issues

[@ahtritcodes7219]

Sir keep the debugging part that helps to read and understand errors

[@shadullahsad9700]

Sir u r the best.. We want real world development.. Dont cut it viya..

[@zuhaibmirza4320]

2:32 Sir ji comment targt completed agla video please jaldi laye ga❤❤

[@MEB_KunalArya]

bhaiya target poora hogya hai please share the next video

[@KunalPatil-il4je]

studing django second time, aab dheere dheere samaz aa raha hai....

[@saharanstudio8683]

Amazing teaching style. Love it

[@trickyplay]

I was looking to learn relationship, best video

[@reachrehman]

Best Teaching Method in the World From PK 🥰🥰

[@nonstopcodingcodewithadity8238]

class City(models.Model): # define model fields for a city class Property(models.Model): city = models.ForeignKey(City, on_delete = models.CASCADE) # define model fields for a property

[@Freak_15]

Chai aur Django mei attendance laga do sir. Video 7 ko already notify mei rakh dia hai, kayi dino se chalta hua ye intezaar aaj kthm hone mei hai. Suna tha aap course videos record krne mei busy the, koi baat nahi humne bhi unn dino beth ke React ko thoda aur seekh lia.... Btana chahunga ki Chai aur backend with Javascript abhi tak maine nahi dekha hai, Django hi mera first Backend work hai, Django ke baare mei aur padha thoda deep mei toh pta chala ki naa toh ye opinionated hai aur naa hi completely unopinioned, Best of both worlds likha tha... Koshish yahi rahegi ki Django ko hindi mei seekhu or Backend with Javascript ko Hitesh Choudary english channel pr seekhu, Usme aapne bola tha ki harr baar aapne bar raise hi kia hai, uss wali series me vo sb toh hogi hi jo isme tha pr Deployment, AWS, Docker vgera bhi cover karne ke plan mei ho. Vaise toh shayad hi tab tak ka intezaar karunga kyunki jab already Chai aur Backend hai toh Intezaar jyada kar paunga ya nhi pta nahi, ek baar Jisse react padh rha hu usse react ho jaye toh Project mei dimaag jyada chalega, Appwrite vagera ke jo aapke projects hain unhe bhi dhyan denge. Chai aur Backend vaha se shuru toh karunga pr tab tak I'm sure kaafi videos aa hi jayengi English channel pr, Itni toh aajayengi ki work kar pau, optimization vagera toh aap baad me btaoge hi shayad Baki freecodecamp vagera toh hai hi, Lage haath git ko bhi thoda brush up kar lunga, 2-3 din hi toh lagenge :)

[@nonstopcodingcodewithadity8238]

bhai or comment kar do mane bhi bhot sare comment kare hai and frnds and sabko share kar ke bol do comment karne ko aap bhi

[@nonstopcodingcodewithadity8238]

bhai dosto se bhi comment karva lo

[@adarshjhaxiif-1289]

phir se wohi baat bolunga, - "Sir aap content ki quality ekdum aise hi rakhiye, comments, likes toh hm dekh hi lenge"❤

[@AnantSrivastava-h7n]

char cup chai ka code mera roz ka na mujko koi roke na kisi ne roka

[@Anku-b9]

😂

[@nonstopcodingcodewithadity8238]

😮😮sir bhot accha padhaye hai

[@CrazyCode-o7c]

finally most awaited relationship has published 😂😂

[@Dev-KD569]

11:49 in simple words sir cascade e query hai jo tab use ati hai jab user data ko delete kar ta hai aur us time hi jo bhi tables hoti hai us user kae naam ki vo bhi delete ho jati hai

[@soumalyadas1123]

38:31 - please show the raw stuff, as in this video. How things get debugged really helps.

[@prabhatpani5495]

Awesome tutorial Hitesh, Thanks so much

[@chaiaurcode]

Most welcome!

[@shoaibbhira5199]

Next vedioa bejhay sir G ye completely ho gai he

[@PavanPatil-rw1je]

Sir, you're doing the best job and thank for all of this

[@supratickmondal4739]

Thank you sir, sometimes it's hard to follow the sequence of the video with docs it's easier ❤🎉

[@riteshkapoor4589]

this is the best playlist for django

[@mrgtxgamerz1]

sir, urgent need a video on web sockets from basics to deploy in production, i am struggling to find any guidence that is in production mode, in past i have built one websocket server and its working on local machine but i does not have an idea to how to connect the nextjs server to web socket server, sir reply kr dena, video aayegi?? 🚨🚨🚨🚨🚨🚨

[@nonstopcodingcodewithadity8238]

hi bro sir padhayage but comment 350 hote hee new video aaygai tho share kar ke bola

[@adityaagarwal3724]

Thx

[@adityaagarwal3724]

Hi

[@informationtech-musa]

Reading documentation is a beneficial habit that enhances understanding of concepts beyond your current knowledge.

[@int_topics]

good video. I find it little bit difficult. might watch once more. going to read docs, it might help. Overall, playlist is great. Keep debugging part as it helps us how to debug while building projects.

[@ArtiGulia-h9g]

Sir ap bhoot acha padhata ho thanks sir

[@WorldOfMini]

I prefer more of you videos over docs as its intresting

[@manojagarwal5554]

Wow 😲 I am new to this channel and its best django playlist

[@NishuSingh12951]

Django is fun when learning from hitesh sir :)

[@jr.devasana]

Cascade is delete related row content also. Agar chai model delete krengy to chai model ka agar koi connection chaiVariety me dia hai to us constraint ko bhi auto delete delete kar dega.

[@moiz217]

thanks for very informative video.