A concise guide to understanding the Repository Pattern for cleaner, more maintainable code. Let's Connect 🤝: codingconcepts.io/connect
Пікірлер: 109
@jojojawjaw3 жыл бұрын
The first 25 seconds of this tutorial alone, does a better job explaining the repository pattern than a hundred other tutorials on KZfaq. This is the best tutorial on repository pattern.
@CodingConcepts3 жыл бұрын
Thank you very much. I really appreciate it.
@sonictailsandsally11 ай бұрын
Seriously though! He get’s straight to the point!
@guilherme-l-moraes2 жыл бұрын
The only problem with this channel is that it has only two videos. Please, post more! High-quality content, easily digestible explanations, and top-notch edition. You got one more subscriber.
@CodingConcepts2 жыл бұрын
Thank you! I’m working on getting another one out.
@tsunamio7750 Жыл бұрын
This is not simply an explanation on the repository pattern. This video reaches about so many principles that young engineers have a hard time acquiring. I already knew all of those concepts but never truly acquired them. You shine bright so strong on those concepts that I now not only understand them, but I also have intuition and instinct about looking out for improvements like those to decouple and reuse code. There is no code per se, yet it did serve as a wonderful example.
@maretzelaltar7833 Жыл бұрын
this is the only video where I was able to understand Repository Pattern. Short but the way the lesson is delivered is clear and easy to digest.
@sonictailsandsally11 ай бұрын
Thank you! I had the gut feeling this vid would give me the answers I was looking for. Should have watched it first and saved time!
@jadawo2 жыл бұрын
One of the best explanations of design patterns I have ever seen. Keep up the great work
@jimbobwylie2 ай бұрын
Why do you only have 2K subscribers?! This is the only one of at least 10 previous videos that has explained Repositories for a true beginner to understand! And this video is 3 years old. Thank you for this!
@CodingConcepts2 ай бұрын
Thank you!
@mb3_media Жыл бұрын
Man, that is the bet explication about that design pattern that I've seen. Thank you so much for your effort
@drewb92 жыл бұрын
This was the best explanation of the Repository Pattern. Thank you for this.
@Johnny-pf1ni Жыл бұрын
Great explanation on the Repository pattern. It makes so much sense to me now.
@infiniteloop5804 Жыл бұрын
I don't comment often on videos, but this video definitely deserves a THANK YOU!!
@harshpatel1052 жыл бұрын
Amazing video
@ItsNylrak3 жыл бұрын
How does this guy don't have a million subs? Explains very well and is easy to understand, only thing I'd suggest is giving quick demo example in the video. Keep up the good work!
@ewomer100 Жыл бұрын
He put up two videos and ghosted.
@ItsNylrak Жыл бұрын
@@ewomer100 A year ago he seemed very promising ngl
@dylan83892 жыл бұрын
Absolutely amazing video, as a relatively inexperienced developer I’m currently learning C# and this video has made complete sense to me.
@andreigudumac4328 Жыл бұрын
Hoping that you make some more videos on design patterns. Thank you. Keep up the good work!
@yellowswordg3 жыл бұрын
Keep them coming. People will love your tutorials!
@Knigh7z2 жыл бұрын
In DDD your repositories should be per aggregate rather than business object. An aggregate may be a business object but it may be more than just one, depending on your needs to enforce consistency during a write. This usually works well with the repository as you'll open a transaction as part of the repository operation.
@nagamahesh6562 жыл бұрын
Crystal Clear Explanation.
@ricardoislasruiz31862 жыл бұрын
This is the best video about this topic I have found on KZfaq!
@CodingConcepts2 жыл бұрын
Thank you!
@balu.922 жыл бұрын
Best tutorial ever! So much explained in so little! ❤️
@zeshanrabnawaz1699 Жыл бұрын
Great Job Buddy ......
@Ajith4u813 жыл бұрын
Best video i ever heard about the Repository pattern
@shywn_mrk Жыл бұрын
I just found this video and your channel. Please continue your amazing work again and keep creating these kind of content 💪🏻
@naelshichida7940 Жыл бұрын
Hey man, thanks so much for this. Me, Dom and Max love your work.
@abymathew575 Жыл бұрын
really good video with good diagrams. Expecting more videos from you.
@jasontaylor8304 Жыл бұрын
Awesome video! Very clean and clear and explanation is spot on.
@javierolazaran72273 жыл бұрын
Loved the topic and the explanation.
@SuhasBharadwajK10 ай бұрын
This is such high-quality content, man! Superb production. You deserve tons of more subscribers. Maybe pushing more videos every week will do the trick.
@shaziakaleem44112 жыл бұрын
Very well explained. Life saver literally. Thank you
@shaharts83333 жыл бұрын
Great video boss👍💥👌
@arsenhakobyan00 Жыл бұрын
This is such a great video. I'm so glad I found your channel. Are you planning on creating more videos like this?
@JD-sn1lr2 жыл бұрын
In the Generic Implementation section, I think you wanted the IRepository to have a Find method of T entity Find(long id) because it will return the T type for any implementation and not just User
@CodingConcepts2 жыл бұрын
You are right! Thank you for pointing that out! That was an oversight on my part. I’ll see if I can add a note at that part of the video to clarify things. Thanks again for letting me know!
@emirhansoylu2 жыл бұрын
Wow, this is amazing work. Thank you!
@doointhedoo10 ай бұрын
Great videos. Subscribed. Would like to see more industry real life examples. Especially this part ( 10:46 ).
@slowmollyfar Жыл бұрын
Thanks a lot for these explanations, illustrations nice as well
@paulstanley27893 жыл бұрын
Great video.I hope you can make some more.
@twentxx Жыл бұрын
Man, this is very good video Thank you 😊 We will waiting for your videos
@bokunochannel842072 жыл бұрын
awesome content, more about design pattern please.
@ashishchandra4078 Жыл бұрын
Great explanation , thank you :)
@MsLiberanimus Жыл бұрын
the best explanation ever 🙌🙌🙌
@juanavalo2 жыл бұрын
Great video!
@mohamedQ Жыл бұрын
nice and easy to understand straight to the point thx a lot
@nilpunch23 жыл бұрын
You are cool, make more videos like this, and your channel will grow very quickly!
@AkhmadKhanifZyen2 жыл бұрын
this is high quality concepts, too bad this channel ended up only with 2 videos. i still waiting for another concepts. keep up the good work.
@CodingConcepts2 жыл бұрын
Thanks! I’m working on another video. Apologize for the delay!
@Zoreens2 жыл бұрын
@@CodingConcepts :D
@CodingConcepts2 жыл бұрын
@@Zoreens I’m working on one. Promise 🙂
@josephthecreator Жыл бұрын
Amazing video, thank you.
@ahmeda.algily49982 жыл бұрын
Wow , just wow 👏👏
@pheroqt12382 жыл бұрын
Hey, are you planning to continue on design patterns (and other topics) in this channel? Really nice explanations!
@CodingConcepts2 жыл бұрын
Appreciate the nice comment. I am working on another video. Just takes me some time because it’s something I do in my spare time and I’ve been busy at work. I plan on going through the DDD concepts first and take it from there.
@pawekoaczynski45052 жыл бұрын
just the video I needed, thanks c:
@kieljnsz4 ай бұрын
Thanks man! Please post more
@CodingConcepts4 ай бұрын
Thank you!
@nikhilgoyal007 Жыл бұрын
thanks very much!
@alexgavidia73562 жыл бұрын
The best! Thanks
@ksdekamil2 жыл бұрын
great job
@sanamjha12092 жыл бұрын
eagerly waiting new video.
@utkachannel4411 Жыл бұрын
wow, thank you very much !
@yaulinfung96153 жыл бұрын
keep it up!
@rasimatics2 жыл бұрын
Great!!!
@stevenkjames2 жыл бұрын
Cool
@ruslanustiuhov55103 жыл бұрын
nice one!
@lorenzosala35273 жыл бұрын
Thank you so much!
@CodingConcepts3 жыл бұрын
You’re welcome!
@andrey_aka_skif8 ай бұрын
The Repository pattern seems simple. Great! I need to implement it in my project! I'm making it. Fabulous! Wait... I need filters... Damn. What I should do? Should I add filtering methods to the repository? It is a bad idea. I need to read the Internet. Hmm... CQRS? Now I have to use the Repository only to update the business object. To get composite data I have to use Queries. They are not so clean anymore. They usually know about the database type. What's the result? The simple idea of a Repository results in a complex mess of Repositories and Queries. Usually there is also a Unit of Work running nearby. What do you think about compound queries in the context of the Repository?
@CodingConcepts8 ай бұрын
For most cases it’s usually acceptable to have different method definitions. -FindByName -FindByEmail -FindByPhone etc.. If your query is particularly complex, or it needs to be used in other areas of the system, typically complex business logic, you may want to look into the specification pattern. In short, you would encapsulate the query logic inside the specification object, and then inject that specification wherever needed, in this case, a repository. Happy Coding! Rob
@TramoTech2 жыл бұрын
👍
@abdelrahmanmoubarak79342 жыл бұрын
That's really great
@egor.cleric Жыл бұрын
What about aggregation root?
@InfoAufArabisch5 ай бұрын
Could you please elaborate more about the test problem at 02:24 till 02:45? I don't understand how this makes it harder to write a test
@CodingConcepts5 ай бұрын
Of course! At 2:24 I was trying to illustrate a scenario where a lot of logic resides in the controller. When you see "thick" or "bulky" controllers like this, it becomes very difficult to test your code because of the dependencies these controllers are using. ie: a database. The design at 2:45 is improved because it moves the database dependency out of the controller and into the repository. This puts us in a position to use a Mock for our repository to better target the specifc area of code we're looking to test. Hope this answers your question. Happy Coding! Rob
@noblenetdk Жыл бұрын
impressingly precise and consice. Haven't seen this explained that clear before. Do the pattern have any drawbacks? Keep up the good work!
@CodingConcepts Жыл бұрын
Interesting question! I haven't thought about it from this context. There isn't an obvious tradeoff or drawback that comes to mind. I would say the biggest debate I've seen regarding the pattern has delt with specific implementations. Particularly when injecting an Object Relational Mapper (ORM) such as Entity Framework, which already implements the Repository Pattern (with unit of work) itself and will lead to code duplication and violation of the DRY principle (Don't Repeat Yourself).
@pictzone Жыл бұрын
@@CodingConcepts Why would you inject an ORM if you already created a custom data access layer with the repository pattern? The only reason I see where you would reach such a situation is if your main data access is already an ORM and you also integrate your own repository for more custom work. Wouldn't this scenario only create complementary code, thus not violating the DRY principle? (i mean it's still not 100% DRY, but still reasonably well)
@CodingConcepts Жыл бұрын
@@pictzone Great question! There is no definitive answer to this and it really comes down to the trade-offs you're willing to accept. I find myself writing my own repository classes because I find it makes my code much more testable. I'm a strong advocate for Test Driven Development (TDD) and I believe good code is testable code. By writing my own repositories, I'm able to easily mock their return values with testing tools such as Moq. I'm able to reduce the duplicate code it creates, which you've correctly identified, by using generic repositories in a lot of cases. ORM tools do provide in memory testing tools, but I just don't find the usability as streamlined as Moq. So for me, I find the trade off of increased testability at the cost of some duplication acceptable.
@alexaugusto59352 жыл бұрын
In case the data comes from another application, like from another REST API. Can the implementation of the Repository, be the consumer client of the REST API? Or Repository Pattern only applies to something like Databases?
@CodingConcepts2 жыл бұрын
You’re typically going to be using the repository pattern in conjunction with a database or some other data store. You could receive data from a REST Api such as a CustomerId to then fetch additional information about that customer using a repository. I hope that clears things up for you.
@kislayapant61192 жыл бұрын
Great explanation. Just one suggestion, please do not use Uppercase everytime. It is sometimes very hard to read the content displayed over the screen.
@CodingConcepts2 жыл бұрын
Thanks for the feedback!
@yosiyosiro38662 жыл бұрын
I sub
@newagene8276 Жыл бұрын
What can be done for other complex operation how to segregate those in terms of repositories? outrside crud we might need more methods in a large software
@CodingConcepts Жыл бұрын
Take a look at the specification pattern
@fodiecamara96510 ай бұрын
Post more videos
@pgbpro202 жыл бұрын
Very helpful! Flexibility is spelled wrong throughout haha.
@CodingConcepts2 жыл бұрын
Thank you for letting me know!
@iMaxos2 жыл бұрын
GOLD
@futsuchinpo9892Ай бұрын
thanks man
@CodingConceptsАй бұрын
You’re welcome!
@futsuchinpo9892Ай бұрын
@@CodingConcepts woah you still active on KZfaq ? Nice
@CodingConceptsАй бұрын
Yup 🙂
@andianwar5784 Жыл бұрын
come back bro
@feoktant3 жыл бұрын
Are you sure about generic interface repo? Not all repositories should look like this. Some business objects should not be deleted, other should not be updated.
@CodingConcepts3 жыл бұрын
I agree. Not trying to make the argument that a generic repository is best in all cases. Just trying to show different strategies and implementations. Appreciate your comment.
@m3hdim3hdi9 ай бұрын
what is the difference between the DAO and the Repository pattern?
@CodingConcepts9 ай бұрын
There is a pretty good discussion I had in the comments about this with another viewer. I linked the comment below. Let me know if that clears things up. kzfaq.info/get/bejne/rpxzZZOrzcCsp2w.html&lc=UgwoV2MDbSnxx_sXtFR4AaABAg
@titobundy4 ай бұрын
@@CodingConcepts I don't see the discussion. Is the url correct?
@CodingConcepts4 ай бұрын
@@titobundy Sorry about that. I'm not seeing the comment any more. I will post the discussion here. Question: I might be confused but i find this pattern really similar to the use of Data Access Objects. Are there any differences ? Should we be using one over the other ? Reply: A Data Access Object (DAO) is all about data persistence. It will sit below the Repository, and will match one to one with an underlying database table or view. It's an object representation of the underlying data schema. It's logicless. The return type of a repository is going to be an Entity or Aggregate which are business objects. They may closely resemble the underlying data schema, but you're getting business objects back. Which will have some form of business logic in them. In general, you'll see DAOs used in more complex architectures, to handle specific persistence requirements. Question: So if i understood correctly, they are used together and DAO will return data as JSON for example, when Repository will cast it to Business objects (and perform other operations) ? Do you have some tips on how to know if we should use DAO, repository or both ? Reply: A repository is an abstraction of a collection of objects. A DAO is an abstraction of data persistence. A UserRepository should only ever return User. It shouldn't for example return a RoleObject. A UserDAO on the other hand, it would be acceptable to return information about a User and have another method to return information about it's Roles. As it's only concern is how the information is persisted/stored in the database. The key thing to note here is it's just returning data for you. A good use case for a DAO would be when the underlying data schema is very complex. Perhaps, that UserObject needs several database operations behind the scenes to construct. Put logic like that in a DAO, not a Repository. An Object Relational Mapper (ORM) such as Entity Framework, is going to eliminate the need for a DAO in most cases. It's going to do most of that work for you.
@titobundy4 ай бұрын
@@CodingConcepts Thank for your post. I would like to have your point of view. Do you think tools like TypeOrm or Spring Data, which apply the repository pattern, do so according to Martin Fowler's definition in his book Refactoring or perhaps Eric Evans in his book DDD, or do you think such implementations are closer to what DAO offers?
@CodingConcepts4 ай бұрын
@@titobundy I can't speak specifically to TypeOrm or SpringData as I haven't used those tools before, I mainly use Entity Framework. But in general, I would say both. Modern ORM's are applying the repository "by the book" but are also becoming exceptionally well at mapping complex data objects. I would expect the need for a DAO layer to decrease over time.
@CandiceWilliams_ Жыл бұрын
I wish I had more time to pick this up so I know how to communicate with my devs and explain how I need to be able to access payment history and user referrals with my flutter app so I can create reports to keep my affiliates and stockholders up to date… if any one has any tips please share. I appreciate you so much in advance.