Flutter Clean Architecture - Learn By A Project | Full Beginner's Tutorial 

🌐 JOIN TO TELEGRAM COMMUNITY 🔗 t.me/flutterguysgp

It is so helpful that you show the errors you encounter and how to solve them. Makes a big difference, thanks.

Go to video for one who wants to learn Clean Architecture with a real world example. Definitely a good watch & bookmark for me for Future references. Thanks a lot for the valuable content. I had to pause and watch to understand, the content is very intense.

Great video! Well explained and following KISS principle. I would love to get more in depth videos and something that is not quite out there yet (at least an updated version), something like an authentication feature using OAuth or Firebase Auth alongside a simple routing system that redirects you the right presentation page depending if you are signed in or not in the meanwhile taking advantage of deep link. I think this makes a lot of sense since we are using a Clean Architecture approach to Flutter, in this way we may create an App that is multi-platform compatible and highly scalable and maintainable.

Complete the whole course, excellent work @Flutter Guys. More power to you.

Great video, exactly what I needed to start this new "clean code" journey and also thanks for providing a link to that three-part series of articles in the description. I definitely need to follow up by reading them too since I struggled a bit with following the fast paced monotone computer generated voice.

Recently I'm thought about what is good architecture for flutter project. And I met this channel and this Clean Architecture is blowing my mind. This video has concrete example so I can learn the folder structure and concepts of clean architecture. Thanks you from bottom of my hearts❤. From S.Korea as Flutter position developer.

Best clean arch explaining , thanks a lot🥳

Can't wait for more ❤❤❤

Learned a lot. Thanks!

Very nice and complete explanation, thanks a lot! Looking forward for similar videos on other topics!

Бро просто сделал титаническую работу. Спасибо

love the fireship format

Thank you so much, I am learning a lot from your videos. Subscribed!

Thank you very much for the content 💙😊

If you have multiple features for an app, would you not want to put the app database class and its generated floor code in the core package? Having it in the news feature package would make sense if that feature was going to be standalone module but Im not familiar with how that works in flutter and Im assuming thats not the case here.

@flutterguys in 28:32 you manually edit the ".g.dart" file, what happen if i re-run "flutter pub run build_runner" again?will the manual modification gets replace by generated code again?

This series is awesome ❤

Sir you just earned a new subscriber

Nice video but you should not have done those explicit correction on generated file in minutes 28:00 , there was a work around. I believe that was missed in this video. It is as follows: since the response from api is not a json array but json object; we need to parse that json object. This can be achieved by following three simple steps in their respective file: Step no 1: In article.dart file inside folder models ######## add another class named ArticleResponseModel like below and ArticleModel as before: class ArticleResponseModel { List articles; ArticleResponseModel({required this.articles}); factory ArticleResponseModel.fromJson(Map articleResponseData) { return ArticleResponseModel( articles: ((articleResponseData['articles'] ?? []) as List) .map((dynamic article) => ArticleModel.fromJson(article)) .toList()); } } class ArticleModel extends ArticleEntity { const ArticleModel({ int? id, String? author, String? title, String? description, String? url, String? urlToImage, String? publishedAt, String? content, }) : super( id: id, author: author, title: title, description: description, url: url, urlToImage: urlToImage, publishedAt: publishedAt, content: content, ); factory ArticleModel.fromJson(Map articleModelData) { return ArticleModel( author: articleModelData['author'] ?? "", title: articleModelData['title'] ?? "", description: articleModelData['description'] ?? "", url: articleModelData['url'] ?? "", urlToImage: articleModelData['urlToImage'] ?? "", publishedAt: articleModelData['publishedAt'] ?? "", content: articleModelData['content'] ?? "", ); } } Step no 2: And news_api_service.dart, new get method function looks like below ######## @GET('/top-headlines') Future getNewsArticles({ @Query("apiKey") String ? apiKey, @Query("country") String ? country, @Query("category") String ? category, }); Step no 3: Change ArticleRepositoryImpl as below: ######## class ArticleRepositoryImpl implements ArticleRepository { final NewsApiService _newsApiService; ArticleRepositoryImpl(this._newsApiService); @override Future getNewsArticle() async { try { final httpResponse = await _newsApiService.getNewsArticles( apiKey: newsAPIKey, country: countryQuery, category: categoryQuery); if (httpResponse.response.statusCode == HttpStatus.ok) { // here you need to return httpResponse.data.articles instead of httpResponse.data return DataSuccess(httpResponse.data.articles); } else { return DataFailed(DioError( error: httpResponse.response.statusMessage, response: httpResponse.response, type: DioErrorType.badResponse, requestOptions: httpResponse.response.requestOptions)); } } on DioError catch (err) { return DataFailed(err); } } } easy peasy lemon squeezy

When I have written in MVC, I've usually had another project called Domain.Shared as well as Domain. Is this a good idea for a Flutter project? What about class inheritance? As an example. A BaseEntity to hold/contain shared properties between entity classes?

Very Informative 😉🤞

Thanks for the video, learned a lot about new dependencies and code pattern

The video I should have seen before starting the application I’m working on xD

Thanks for the detailed explanation on the architecture....can you show how to cache remote responses to local Database too....

Tks, great content, i've learned a lot with your videos. Just one point. I dont like to my domain depend on dio package. Dio is a infrastructure concern

Thank you for giving me that "Eureka!" moments

Hello, many thanks for content! Any recomendation how to pass different combinations of query parameter/s, header/s and body to use cases? First API endpoint (use case) requires Id(query) and entity(body), second endpoint requires Id(query) and userId(header) for example. Should I create special params entity for all use case inputs?

What a great video, thanks alot !!

Thanks man ❤

Greate video

simple explanation, great video. Im looking forward for new videos keep going man

Best

hello ! is there any extention to give a folder icon like in the case of your vs thank you

Thank you for thi type of content. i was looking for it for many days

I have some concern about the ArticleState at 19:02 . Is safe using bang operator on 'props' method? I mean, both parameters are nullable so if we have the data the error will be null and I expect that there will be a crash. No?

Nice work done buddy nice explanation as per industry standards

i watched more than 10 times, thanks a lot, i gonna be a master Flutter like u Flutter Guy.

great video! one question, is it safe updating generated files by hand ? what happens when you rerun the build command ? will your manual updates not be overriden ?

Thank you very much for sharing this knowledge 🙏💚. I wanted to ask if I had many models, entities, and api services. Every time I run "build_runner build," will I have to edit all the api services to work properly the same way we did it in this video?

its better have data/domain/presentation as main layers, and then add by module like data/auth/..., that repeat on each feature all the auth/domain/data... layers, having many directories make it complex to read.. simple its better always

this is the first clean one ever and advance

Hey guys, just wanted to ask if the data from two different features can interact with each other? Im making my first app and similar to your news example, I want a Songs list and a Chords list. All data will be fetched from a local DB (one Songs table, one Chords table). Each entity/model contains a list of chords (List of entity/model). So if I wanted to edit a chord, the change needs to be reflected in each entity/model. So I'm a bit confused as to how I can achieve this. Great video btw!

what is the difference between this architecture, MVP, MVC, or MVVM and which is better

Amazing video! But few concepts goes beyond my head. Can you provide few learning resources that I can use to follow to have better understanding of the architecture. I would appreciate your headsup on this! :)

Amazing thanks ❤

Then where should I set my user token value for dio options headers?

great work and cool video!) it whould be very interesting to see the same topic in some depth: pagination. how to handle state when we have pagination in items list? and what if we need save all content, not only selected by user, for displaying when there are no conection?

Great video! Thanks for the content... I have one confusion... Could @flutterguys or someone please explain this to me?... Since the presentation layer (bloc, state, widgets, etc.) and the data layer repo implementation (for saving articles locally) depend on the ArticleEntity (the domain entity), then how does this clean architecture make layers independent from each other or at least the domain layer decoupled from the other layers? TIA

The folder structure is a bit complex, but a great video nonetheless. I would much like to see a cleaner implementation without relying on multiple dependencies. A question, at this moment, i was working on a hobby project of mysql node js api which i could call using retrofit. Flutter Bloc has went through a lot of updates. If Possible Please do an indepth video on Hydrated Bloc pattern and Retrofit CRUD Requests Would love to see your take on that.

Hi, great video. May I know what extension are you using for the folder icon?

very crisp & clear explanation .. Just wanted to ask can we use the bloc's cubit instead of old bloc state management method

As we didn't use the fromjson method but it didn't pose a problem why?

This awesome! Create another project pls 🎉

why not hive? retrofit really need dio can do most of the work ?

best❤

thnx, please a clean aechitecture project with Hive and bloc

Too fast for begineer so great video but will back later after become good at flutter !! make a medium pace videos so that it would be beginner friendly too !

Hello, can you tell how to pass bloc reference from one screen to others.

hi, after searching whole internet i found this wonderful tutorial about clean architecture, but i am little confuse about the difference of mvvm, mvc and mvi architecture vs clean architecture, somewhere in stackoverflow i read that mvvm and.... only use in presentation layer and we can use them even in clean architecture , so here in this project what kind of architecture are you using in presentation layer? and can you explain about it? thank you ❤

This could have been better if you made a bootcamp style. I will gladly watch a 24 hour version of it.

Hey, why ingredient model doesn't pass parameters to super class? Thanks

i encounter a problem took me few hours to figure it out, ArticleModel constructor name params should be super.title, if it is String ? title, all ArticleModel we get from factory, their attibute all Null

Hi I have one question why repo abstraction is in domain layer why it is not in data layer? can you please explain in comment.

hi what about other methods post put delete?

In Create Repository Classes and Models video you make the Data model extend the Domain Entity which creates a dependency on Domain Layer from Data layer. Isn't it an antipattern? Well maybe it's not, since the Data layer should be swappable and the Domain layer contains only bussiness logic that should not have any frameworks and specific implementations/technologies.

Please put subtitles on your videos. Today with AIs it is so simple and easy! This way, people from all over the world can see your videos.

Very good content, thank you! I would have a question regarding entities and models.. isn't there an easier way of doing that without writing a model that looks almost the same as the entity besides the annotations? It looks like a lot of duplicated work especially when changing the entities/modes...

btw i like your videos. i am actually one of your older subscriber

It's not really clean, the folder structure actually makes me confused :), but it's still a great video, thanks for sharing!

I'm not a fan of feature folders... I had a better experience with having the layers a the first folders. Afterward, if the project needs to be broken in modules, I would add for each module a layer structure. Important is to acknowledge that simple apps don't need that many layers and sometimes can overcomplicate a simple 3 feature app. The use case is pointless in this example and can be easily pointed out as overengineering. Use the repository directly as use cases and you will have a simpler design. You have the same flexibility, or even bigger. Less code > More code.

Hey really nice video 👍, i had one question, so what if two different features share the same state, like they depend on a reactive state, where would you put it? Should it be in the data section but it won't be from a data source but just some shared state, how do you handle this.

Hi, I'm new to the BloC pattern and Flutter so please excuse my ignorant question about the 'Create BloC' section. I looked up BloC examples online and they all seem to involve the use of StreamController in some shape or form. How come in this tutorial, only the emit is used? And thanks for the great video. Subscribed!

At first, I thought the video was playing at 1.5x speed😐 Btw...thanks for this video!!

ok but if we want to make a post for register?

I don't know if this is a good approach for big projects I mean in the example you have it is a small app and you have a huge folder structure what would happen with medium-big projects?

Great content! and I have a question in terms of scalability. as for now we only have 1 api to deal with and the sl is full of content. what if the api count goes for like 50? how to handle it in clean architecture?

waiting for your new videos

Subscribed

if you having an issue at 14:17 like "Failed to build build_runner:build_runner: ~~~~~ final error = e[0] as Object? ?? NullThrownError();" you should go to terminal agin, write; flutter pub upgrade flutter pub outdated flutter pub upgrade --major-version flutter pub get then you can try again to continue; flutter pub run build_runner build (': sorry if im mistaken , some code may be unnessecery but in total, that's works for now :')

None of the statements in initializeDependencies() method are asynchronous. Why is the function itself asynchronous?

Firstly, thanks for the video. Great explanations with great content. I have two questions. 1. Is it a good practise extending dataModel from entity? I think they should be seperate totally and we can use a mapper class for entity->model or model->entity transformations. 2. Is using methods like _buildAppBar and _buildBody legal? I agree with you, the code looks organized but I think flutter doesn't recommend doing this due to performance issues. What do you think?

عالی پسر

I'm getting the exception in the "article!urltoimage!" in the article_tile.dart file as -> "no host specified in the URL ". how to resolve this??

thanks

For those whose build_runner command is not working add retrofit_generator in dev_dependencies.

Hey! I need you help. I really like this clean architecture kind of programming because it will be more professional to use this instead of direct and hard coded practices. the problem is it is very hard to me. how can i learn it because of the complex kind of programming. how did you learn it and what was of help. Thank you

I think it's a bad arhitecture to have different blocs for remote/local. IMO you should have the remote/local repositories which are interchangable, based on network connection. It more simple/clean/maintable and reduce the boilerplate comes with having diffeent blocs for remote/local.

Great tutorial bro. Sory but I got a problem when get imageUrl _TypeError (Null check operator used on a null value) in article_tile.dart would you help this error, thanks

Thank you for this great explanation Can you please share the updated repo? the repo in the link is not updated Best Regards,

Great videos! but I have question, why after I remove the saved article, it's UI didn't re-render...? (removed article didn't disappeared) I have to go back to the prev page, then go again to Saved Articles page to get the UI changing (removed article has disappeared)

Putting the abstract "usecase" class file into the core folder seems arbitrary. It is an essential part of the domain layer and should be located there, next to the use case implementations. When you put it into "core," you have a hard link between the domain and core layer, which makes the domain layer not independent of the other layers!

instead of DataSuccess and DataFailed we can use Functional programming..

great tutorial. in minutes 28:00 i tried my code and got I/flutter null. please advice. thanks

What is the dagger alternative for Flutter?

thanks for nice video i just want to mention one thing it is not good idea to edit generated file (.g file) to solve that parse issue problem it is better to handle it by our own and change Future to Future and in article_repository_imp.dart parse it like this : List articles = (httpResponse.data['articles'] as List) .map((e) => ArticleModel.fromJson(e)) .toList();

Good. But i have doubt, is calling initialize dependencies in main methods does impact on the performance of the app, since in big app with 1000 block and more repo, how we can do it better way

really like this style ❤

Hi. Nice tutorial, but method extract is bad practice . Or no?

Best video out there for flutter clean architecture Still i've some confusion can you help me?