Laravel Repository Design Pattern

Introduction

Laravel Repository Design Pattern package provides an overview of the design pattern used in a Laravel service and repository structure. The primary goal of this pattern is to separate concerns, improve code organization, and enhance maintainability.

Repository Pattern Components

Service Layer: This layer contains the business logic of your application. It abstracts the application's functionality from the controller, promoting better separation of concerns.
Repository Layer: The repository acts as an interface to interact with the database. It abstracts the database operations from the service layer, making it easy to switch to a different data source without affecting the business logic.

Get Started

Requires PHP 8.1+

First, install package via the Composer package manager:

composer require surazdott/laravel-repository

Generating Classes

You can also generate repository class indivisually or can be generated with options.

`Basic Commands`

// Generate repository class
php artisan make:repository UserRepository

// Generate repository with service
php artisan make:repository UserRepository --service

// Generate repository with interface
php artisan make:repository UserRepository --interface

// Generate repository with interface and service
php artisan make:repository UserRepository --all

// Generate service class
php artisan make:repository-service UserService

// Generate interface class
php artisan make:repository-interface UserRepositoryInterface

To find help and options

php artisan make:repository --help

Basic usages

As the software development industry continues to evolve, there has been a focus on improving code maintainability, leading to modifications in design patterns.

`Base Class`

use SurazDott\Repositories\BaseRepository;
use SurazDott\Services\BaseService;

Let's look at a simple example:

Repository Interface

Make your initial repository interface first.

php artsian make:repository-interface UserRepositoryInterface

App\Repositories\Interfaces\UserRepositoryInterface.php

<?php

namespace App\Repositories\Interfaces;

use Illuminate\Database\Eloquent\Model;

interface UserRepositoryInterface
{
    /**
     * Find database record by id.
     *
     * @param  mixed  $id
     */
    public function findById(string $id): ?Model;
}

Repository Class

Use this command to create your first repository class.

php artisan make:repository UserRepository

App\Repositories\UserRepository.php

<?php

namespace App\Repositories;

use App\Models\User;
use App\Repositories\Interfaces\UserRepositoryInterface;
use Illuminate\Database\Eloquent\Model;
use SurazDott\Repositories\BaseRepository;

class UserRepository extends BaseRepository implements UserRepositoryInterface
{
    /**
     * Create new repository instance.
     */
    public function __construct(
        protected User $model
    ) {
    }

    /**
     * Find database record by id.
     */
    public function findById(string $id): ?Model
    {
        return $this->model->find($id);
    }
}

Service Class

Use the following command to create the service class after the interface and repository.

php artisan make:repository-service UserService

App\Service\UserService.php

<?php

namespace App\Services;

use App\Repositories\UserRepository;
use Illuminate\Support\Collection;
use Illuminate\Database\Eloquent\Model;
use SurazDott\Services\BaseService;

class UserService extends BaseService
{
    /**
     * Create new service instance.
     */
    public function __construct(
        protected UserRepository $repository
    ) {
    }

    /**
     * Find database record by id.
     *
     * @param  string  $id
     */
    public function findById($id): ?Model
    {
        return $this->repository->findById($id);
    }
}

Controller Class

Now create a Laravel controller file and use the service class as below.

php artsian make:controller UserController

App\Http\Controllers\UserController.php

<?php

namespace App\Http\Controllers;

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

class UserController extends Controller
{
    /**
     * Create a new controller instance.
     */
    public function __construct(
        private UserService $users
    ) {
    }

    /**
     * Display a listing of the resource.
     */
    public function edit(Request $request): View
    {
        $data['user'] = $this->users->findById($id);

        return view('admin.users.edit', $data);
    }
}

Eloquent Query Builder

If you want to run eloquent queries, you can call the query() function to get an eloquent builder. Example: $this->users->query()->latest()->get();

<?php

namespace App\Http\Controllers;

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

class UserController extends Controller
{
    /**
     * Create a new controller instance.
     */
    public function __construct(
        private UserService $users
    ) {
    }

    /**
     * Display a listing of the resource.
     */
    public function index(): View
    {   
        // get all users
        $data['users'] = $this->users->query()->latest()->get();

        // get active users
        $data['activeUsers'] = $this->users->query()->where('status', true)->get();

        return view('admin.users.index', $data);
    }

    /**
     * Show the form for editing the specified resource.
     */
    public function edit(Request $request): View
    {
        $data['user'] = $this->users->findById($id);

        return view('admin.users.edit', $data);
    }
}

Methods

Take a look at some of the methods in the following list.

`create()`

To insert a new record into the database, you should use create method.

$data = $request->validated();
$this->userService->create(array $data);

`find()`

To get the first record from database records, you should use find method.

$this->userService->find(string $id);

`first()`

To get the first record from database records, you should use first method.

$this->userService->first(string $id);

`findOrFail()`

To find specific record from database records, you should use findOrFail method.

$this->userService->findOrFail(string $id);

`update()`

To find specific record from database records, you should use update method.

$data = $request->validated();
$this->userService->update(string $id, array $data);

`delete()`

To delete records from database, you should use delete method and pass integer, array or string.

$this->userService->delete(mixed $ids);

`query()`

You can build the database builder by using the query method and run eloquent queries and model scopes.

$this->userService->query();

Contributing

If you find any issues or have suggestions for improvements, feel free to open an issue or create a pull request. Contributions are welcome!

License

This package is open-sourced software licensed under the MIT license.