In Laravel, model observers allow you to listen to various events triggered by your Eloquent models, such as when a model is created, updated, deleted, or retrieved. Observers provide a convenient way to centralize and organize the logic related to these events.
let's see how to create observers class and how it will works:
app/Models/Product.php
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Product extends Model
{
use HasFactory;
protected $fillable = [
'name', 'price', 'slug', 'unique_id'
];
}
For Create observers class of Product Model Run Below Command,
php artisan make:observer ProductObserver --model=Product
app/Observers/ProductObserver.php
<?php
namespace App\Observers;
use App\Models\Product;
class ProductObserver
{
/**
* Handle the Product "created" event.
*
* @param \App\Models\Product $product
* @return void
*/
public function creating(Product $product): void
{
$product->slug = \Str::slug($product->name);
}
/**
* Handle the Product "created" event.
*
* @param \App\Models\Product $product
* @return void
*/
public function created(Product $product): void
{
$product->unique_id = 'PR-'.$product->id;
$product->save();
}
/**
* Handle the Product "updated" event.
*
* @param \App\Models\Product $product
* @return void
*/
public function updated(Product $product): void
{
}
/**
* Handle the Product "deleted" event.
*
* @param \App\Models\Product $product
* @return void
*/
public function deleted(Product $product): void
{
}
/**
* Handle the Product "restored" event.
*
* @param \App\Models\Product $product
* @return void
*/
public function restored(Product $product): void
{
}
/**
* Handle the Product "force deleted" event.
*
* @param \App\Models\Product $product
* @return void
*/
public function forceDeleted(Product $product): void
{
}
}
Register Observers class in provider.
app/Providers/EventServiceProvider.php
<?php
namespace App\Providers;
use Illuminate\Auth\Events\Registered;
use Illuminate\Auth\Listeners\SendEmailVerificationNotification;
use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Event;
use App\Observers\ProductObserver;
use App\Models\Product;
class EventServiceProvider extends ServiceProvider
{
/**
* The event to listener mappings for the application.
*
* @var array>
*/
protected $listen = [
Registered::class => [
SendEmailVerificationNotification::class,
],
];
/**
* Register any events for your application.
*/
public function boot(): void
{
Product::observe(ProductObserver::class);
}
/**
* Determine if events and listeners should be automatically discovered.
*/
public function shouldDiscoverEvents(): bool
{
return false;
}
}
Create Route:
routes/web.php
<?php
use Illuminate\Support\Facades\Route;
use App\Http\Controllers\ProductController;
/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/
Route::get('product', [ProductController::class, 'index']);
Create Controller
app/Http/Controllers/ProductController.php
<?php
namespace App\Http\Controllers;
use App\Models\Product;
use Illuminate\Http\Request;
class ProductController extends Controller
{
/**
* Display a listing of the resource.
*
* @return \Illuminate\Http\Response
*/
public function index()
{
$product = Product::create([
'name' => 'Platinum 1',
'price' => 10
]);
}
}
Now you can run project and see in your database Entry.
