What is the story
Think that you have a blog and you want to show top ten posts in your index page, and imagine that you have many posts in your site, in this scenario you should send a query to your database per user who open your first page ...
so what can you do ?
You can fetch it every hour f.e. and save it and then serve it to the user without need to use db
lets start
step one
First define your route
routes/web.php
<?php
use Illuminate\Support\Facades\Route;
Route::get('/', 'PostController@index');
step two
Define your controller
<?php
namespace App\Http\Controllers;
use App\Repositories\Post\PostRepositoryInterface;
class PostController extends Controller
{
private $postRepository;
public function __construct(PostRepositoryInterface $postRepository)
{
$this->postRepository = $postRepository;
}
public function index()
{
return $this->postRepository->getTopTen();
}
}
step three
Make Repository directory in you app directory and fill it like this
└── Post
├── PostCachedRepository.php
├── PostRepositoryInterface.php
└── PostRepository.php
PostCachedRepository.php
<?php
namespace App\Repositories\Post;
use Illuminate\Support\Facades\Cache;
class PostCachedRepository implements PostRepositoryInterface
{
private $postRepository;
public function __construct(PostRepository $postRepository)
{
$this->postRepository = $postRepository;
}
public function getTopTen()
{
$value = Cache::remember('topTen', 3600, function () {
return $this->postRepository->getTopTen();
});
return $value;
}
}
PostRepositoryInterface.php
<?php
namespace App\Repositories\Post;
interface PostRepositoryInterface {
public function getTopTen();
}
PostRepository.php
<?php
namespace App\Repositories\Post;
use App\Post;
class PostRepository implements PostRepositoryInterface
{
public function getTopTen()
{
return Post::orderBy('star', 'desc')->take(10)->get();
}
}
step four
your post model and migration file
app/Post.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Post extends Model {}
And migration file
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreatePostsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('posts', function (Blueprint $table) {
$table->id();
$table->string('title', 100);
$table->text('text');
$table->integer('star');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('posts');
}
}
step five
Set cache driver config
Go to .env file and change CACHE_DRIVER to CACHE_DRIVER=database
Then run these commands
php artisan cache:table
php artisan migrate
step six
Add these lines in top of the app/Providers/AppServiceProvider.php
use App\Repositories\Post\PostCachedRepository;
use App\Repositories\Post\PostRepositoryInterface;
And then add this line in register method
$this->app->bind(PostRepositoryInterface::class, PostCachedRepository::class);
Done :)
Top comments (2)
nice tutorials thx , I will implement this in golang
You're welcome