Laravel __construct() - without injecting?

Question

I am getting error:

GitHubApp::__construct() must be an instance of App\Project\Repositories\GitProviderRepository

I thought Laravel does some kind of magic when it come to __construct() so i don't have to inject it into new GitHubApp();?

  use App\Project\Repositories\GitProviderRepository;

    class GitHubApp
    {
        private $gitProviderRepository;

        public function __construct(GitProviderRepository $gitProviderRepository)
        {
            $this->gitProviderRepository = $gitProviderRepository;
        }
    }

In other class:

return new GitHubApp();

Risan Bagja Pradana · Accepted Answer · 2016-11-13 17:45:06Z

6

When calling new GithubApp(), you relied on yourself to build the GithubApp instance, Laravel does not responsible for building that instance.

You have to let Laravel resolve the dependencies for you. There are numbers of way to achieve this:

Using App facade:

App::make(GithubApp::class);

Using app() helper method:

app(GithubApp::class);

Or using the resolve() helper method:

resolve(GithubApp::class);

Behind the scene, your class type and its dependencies will be resolved and instantiated by the Illuminate\Container\Container class (the parent class of Application). Specifically by the make() and build() methods.

Hope this help! :)

answered Nov 13, 2016 at 17:45

Risan Bagja Pradana

4,7143 gold badges22 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Amit Gupta · Accepted Answer · 2016-11-13 17:38:51Z

2

You can try as:

return app(GitHubApp::class);

or

return app()->make(GitHubApp::class)

It is done by the powerful IoC container of Laravel to resolve classes without any configuration.

When a type is not bound in the container, it will use PHP's Reflection facilities to inspect the class and read the constructor's type-hints. Using this information, the container can automatically build an instance of the class.

Docs

edited Nov 13, 2016 at 17:38

answered Nov 13, 2016 at 17:23

Amit Gupta

17.7k5 gold badges46 silver badges54 bronze badges

2 Comments

I'll-Be-Back Over a year ago

To improve your answer, please explain how your solution is differ from return new. What does app() do?

Amit Gupta Over a year ago

Answer updated .. If you want more information then you can read the docs, it's all there.

Collectives™ on Stack Overflow

Laravel __construct() - without injecting?

2 Answers 2

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related