ASP.NET Core Web API - 5. Repository Pattern & Dependency Injection Explained

ASP.NET Core Web API 2022 - 5. Repository Pattern & Dependency Injection Explained
UML Diagram: drive.google.com/file/d/1EbYY...
Github Repo For This Project: github.com/teddysmithdev/poke...
Twitter: / teddysmithdev
Github: github.com/teddysmithdev
Linkedin: / teddy-smith-015ba61a3
Website: www.teddysmith.io

[@afelixalves]

Great tutorial! Nice advanced (and correct) structure made simple. With so many bad approaches to API tuturials out there, this is the one to follow! Keep the great work and thanks for sharing it...

[@FoxFireImr]

Thank you, you're really darn great. I look forward to seeing the rest of your videos :)

[@abdulmlaikalomayri727]

As always great videos from teddy smith. Thank you so much.

[@SamuelFatunmbi]

Thank you very very much, Teddy. I love the way you teach.

[@monat_son]

thanks Teddy, quality content!

[@macctosh]

for larger projects its Controller -> Services -> Repositories

[@elchinmirzayev7631]

service instead of interface?

[@hafidazer1634]

This one was abit rough but got the 'get' call working, I guess I have to watch the video few more times to understand the details and again thank you very much Teddy for taking the time to make such great content. Looking forward to the other videos of this series. God bless

[@TeddySmithDev]

Yoooo thank you for your time!

[@kaydenangel3742]

Heish man you are the best👏👏

[@josephh8117]

good explanation of decoupled code. thanks t

[@user-bp7wn8el2j]

it's really great !

[@moviesexplainermarathi6753]

Love your videos brother

[@TeddySmithDev]

Thank you 🙏

[@parthsavliya4441]

God !

[@raggardy]

Hi Teddy. With IEnumerable and ICollection, can you use either or is it convention to use one and stick with it? Cheers

[@TeddySmithDev]

Use IEnumerable when you need to filter data. ICollection has more features like .length and CRUD actions.

[@boopfer387]

8:45 you say an ICollection is only read only - I believe you are referring to IEnumerable, ICollection you can add / remove but only to the end. IList has index so edit anyplace.

[@TeddySmithDev]

Did not know that. Thank you for commenting.

[@oanaghicajanucristina]

great videos! Liked and subscribed, but i have a question. Why did you use mapper? why you did not use logger? and why you didn't use service classes?

[@TeddySmithDev]

I’ve always found that going the extra and creating your own mappers can save time because you never have to debug them and can always easily change to meet needs

[@tilmandr7415]

Hey Teddy, thank you so much for this Tutorial. As an Software Developer that is familiar with the basic concepts of things like DI etc. it is easy to follow. I could imagine, that it could be hard to follow, if you dont have that background knowledge. Maybe you could link Videos that go a little deeper in that concepts in the sections. :) Greets Tilman

[@TeddySmithDev]

I made new blog posts on the topic, but my next course that I’m releasing will explain these topics better. Thanks for watching!

[@lofto8363]

i don't know what i am doing, but im lovin it

[@TeddySmithDev]

Lmao same

[@henrik3098]

thanks man

[@TeddySmithDev]

No prob thanks for watching and commenting 👍

[@etiel]

Do you use reshaper? It's very nice when it's ghosting the completion for you

[@TeddySmithDev]

No but I'll check it out. Resharper is on my to do list of things to do. Thanks for suggestion.

[@kirillzlobin7135]

10:37 IMPORTANT INFO. Services explained

[@patoledavid]

Hi Teddy, I'm trying this video today and I'm getting a 404 Undocumented Error: Not Found in the place where you see the all the Pokemon. All other server responses look to be correct. Would you have an idea on where I could be going wrong? Thanks in advance!

[@junlapunete1602]

Can I ask what font are you using?

[@MuhammadZharifMohdFuad]

Hi Sir, I am getting this error. System.AggregateException: 'Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: WebAPI.Interfaces.IOrderHeaderRepository Lifetime: Scoped ImplementationType: WebAPI.Repository.OrderHeaderRepository': Unable to resolve service for type 'WebAPI.Data.DataContext' while attempting to activate 'WebAPI.Repository.OrderHeaderRepository'.)' Please help

[@eihabelbrgaty8909]

Hi Teddy Million thanks for this tutorials ... I stack with ModelState Error does not exist in the current context

[@yugant]

i was stuck at the same issue . Your controller needs to inherit from ApiController (or Controller) . public class PokemonController : ControllerBase

[@supa_space]

@@yugant Thank you for this tip, I was stuck here for hours😂

[@Raj-iz9uz]

Error : Showing in Swagger : No Operations defined in spec!

[@leafmagi2796]

you really care the plural form of pokemon! Actually the full name is pocket monster, maybe the plural form is pokcet monsters :D

[@TeddySmithDev]

The official Pokémon master has spoken.

[@alidahud337]

​ @Teddy Smith Hi, if it doesn't give me the contents of the database, what should I do? it's giving me back: id: 0 articletext: "string" etc.

[@TeddySmithDev]

That is strange. Maybe you are using method with no default ie. first() and not firstOrDefault()?

[@alidahud337]

@@TeddySmithDev Where?

[@alidahud337]

@@TeddySmithDev even though i successfully seeded some data into the DB

[@alidahud337]

@@TeddySmithDev I found my issue but now another error: System.FormatException: String 'FalseData Source=DESKTOP-HGUF4HF' was not recognized as a valid Boolean., Which is inside of my connection string, but this statement raises the error: return _context.qbitArticles.OrderBy(q=>q.id).ToList();

[@AlThePal78]

Do you use this pattern a lot I was told .NET was a repository pattern or something like that so why do this ? what you think about that

[@mark63424able]

.NET is a software framework

[@omerucansu2569]

Hi sir, Why don't you use the async method

[@TeddySmithDev]

No real reason. Just didn’t add it at the time.

[@baileymorgan9986]

I am getting a CORS error when completing this video. Unsure why as I am not using CORS yet. Any ideas? I have tried multiple browsers.

[@TeddySmithDev]

You need to turn cors off explicitly. Look at my GitHub for examples.

[@baileymorgan9986]

@@TeddySmithDev No where in your github (for this project) do I see references to cors. I am not turning it on explicitly so I am not sure how to turn it off explicitly

[@evilsanta8585]

So youre bringing in the entire databse in. isn't that slower when the database becomes huge

[@TeddySmithDev]

Ef Core only builds SQL queries and doesn’t really bring any data besides what you ask

[@sylgeekhome]

Why pokemon not called pokemons inside dbset?

[@TeddySmithDev]

This is the debate of the century lmao. What is the true plural form of Pokémon??? 🤣

[@yusufkaandemirbas4451]

Is it an entry level course? By brain blowed up

[@TeddySmithDev]

May want to check intro to C# video series on my homepage

[@tylerb5803]

Fun fact, if your scrolling down because it's not working when you click run. Don't forget to build your solution first.

[@rifathossain328]

i know OOP but i am getting lost here kinda confusing .

[@yassir3841]

me too man me too

[@Shadowplayification]

I'm a little late to the party, I know, but when i try to run my code, I get this Exception: System.InvalidOperationException: 'Action 'PokemonReviewApp.Controllers.PokemonController.GetPokemons (PokemonReviewApp)' does not have an attribute route. Action methods on controllers annotated with ApiControllerAttribute must be attribute routed.' What can I do to fix this?

[@Shadowplayification]

The Exception gets thrown at app.MapControllers(); in the Program.cs class.

[@TeddySmithDev]

You might need to check to see if controller annotation is in your controller code

[@juricamihin7524]

just add using RouteAttribute = Microsoft.AspNetCore.Mvc.RouteAttribute;