How to include a query using the repository pattern in Laravel?

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Using the repository pattern in Laravel is quite simple. Here are the steps to follow:

1. Create a repository interface: A repository interface defines the public methods that the repository will expose. For example, if you want to fetch a list of users, you can define a method called getAllUsers() in your interface.

2. Create a repository implementation: The implementation of the repository interface contains the actual implementation of the methods defined in the interface. In this implementation, you can define the queries that fetch the required data from the database.

3. Create a service class: The service class acts as a mediator between the controller and the repository. It contains the business logic for fetching and manipulating data. This class should accept an instance of the repository as a constructor parameter so that it can use the repository's methods.

4. Inject the repository instance into the service class: You can inject the repository instance into the service class using dependency injection. This makes it easy to switch out the implementation of the repository if you need to.

5. Use the service class in the controller: Finally, you can use the service class in the controller to fetch and manipulate data. Since the service class contains the business logic, you can keep your controller methods clean and concise.

Here is an example of how to fetch a list of users using the repository pattern in Laravel:

1. Create a repository interface:

<?php

namespace App\Repositories;

interface UserRepositoryInterface
{
    public function getAllUsers();
}

1. Create a repository implementation:

<?php

namespace App\Repositories;

use App\User;

class UserRepository implements UserRepositoryInterface
{
    public function getAllUsers()
    {
        return User::all();
    }
}

1. Create a service class:

<?php

namespace App\Services;

use App\Repositories\UserRepositoryInterface;

class UserService
{
    private $userRepository;

    public function __construct(UserRepositoryInterface $userRepository)
    {
        $this->userRepository = $userRepository;
    }

    public function getAllUsers()
    {
        return $this->userRepository->getAllUsers();
    }
}

1. Inject the repository instance into the service class:

<?php

namespace App\Providers;

use App\Repositories\UserRepository;
use App\Repositories\UserRepositoryInterface;
use App\Services\UserService;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    public function register()
    {
        $this->app->bind(UserRepositoryInterface::class, UserRepository::class);

        $this->app->bind(UserService::class, function ($app) {
            return new UserService($app->make(UserRepositoryInterface::class));
        });
    }
}

1. Use the service class in the controller:

<?php

namespace App\Http\Controllers;

use App\Services\UserService;
use Illuminate\Http\Request;

class UserController extends Controller
{
    private $userService;

    public function __construct(UserService $userService)
    {
        $this->userService = $userService;
    }

    public function index(Request $request)
    {
        $users = $this->userService->getAllUsers();

        return view('users.index', ['users' => $users]);
    }
}