Handle Model Events By Laravel 9 Events And Listeners


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 | Published By: Admin | Published On: Mar 12, 2022 | Category: Laravel 9

Hi friends,

Today, I am explain how to work with Handle Model Events By Laravel 9 Events And Listeners. Article gives you the classified information about handling laravel 9 model events. Inside this article we will see the concept of Laravel 9 Model events tutorial. Article gives you the classified information about laravel 9 model events. you can easy and simply use model creating event in laravel 9. In this example,I will learn you how to use model creating event in laravel 9.

If you are looking for an article about handling model events of laravel, then you are at the good place to learn. Step by step guide for model events, you are going to learn.

If you are looking for an article about model events of laravel, then you are at the good place to learn about model events and their role to use. Step by step guide for model events, you are going to learn.

Step 1: Download Laravel

Let us begin the tutorial by installing a new laravel application. if you have already created the project, then skip following step.

composer create-project laravel/laravel example-app

So let's start following example:

creating: Call Before Create Record.

created: Call After Created Record.

updating: Call Before Update Record.

updated: Class After Updated Record.

deleting: Call Before Delete Record.

deleted: Call After Deleted Record.

retrieved: Call Retrieve Data from Database.

saving: Call Before Creating or Updating Record.

saved: Call After Created or Updated Record.

restoring: Call Before Restore Record.

restored: Call After Restore Record.

replicating: Call on replicate Record.

Sometime, we need to add unique number or create slug from title then before create record you need to update this fields at time we can use those time of event. same thing when you update records then also you have to update slug and might when remove records then also you have to delete child records. so event is very helpful and i will say you must have to use when you need this type of situation.

I will explain few important events with example so you will understand how it works and how you can use it.

In this example, i will write down creating, created, updating, updated and deleted events and i will show you one by one example with output in log file so you can easily understand, how model events works.

Step 2: Create Post Model with events

Here, we will create post model with events. so let's create and put bellow code:

app/Models/Post.php
<?php
  
namespace App\Models;
  
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Log;
use Str;
   
class Post extends Model
{
    use HasFactory;
  
    protected $fillable = [
        'title', 'slug', 'body'
    ];
  
    /**
     * Write code on Method
     *
     * @return response()
     */
    public static function boot() {
  
        parent::boot();
  
        /**
         * Write code on Method
         *
         * @return response()
         */
        static::creating(function($item) { 

            Log::info('Creating event call: '.$item); 
  
            $item->slug = Str::slug($item->title);
        });
  
        /** 
         * Write code on Method
         *
         * @return response()
         */
        static::created(function($item) {           
            /*
                Write Logic Here
            */ 
  
            Log::info('Created event call: '.$item);
        });
  
        /**
         * Write code on Method
         *
         * @return response()
         */
        static::updating(function($item) {            
            Log::info('Updating event call: '.$item); 
  
            $item->slug = Str::slug($item->name);
        });
  
        /**
         * Write code on Method
         *
         * @return response()
         */
        static::updated(function($item) {  
            /*
                Write Logic Here
            */    
  
            Log::info('Updated event call: '.$item);
        });
  
        /**
         * Write code on Method
         *
         * @return response()
         */
        static::deleted(function($item) {            
            Log::info('Deleted event call: '.$item); 
        });
    }
}

Now here, we will simply call one by one model method and let's see output:

Step 3: Create Record: Creating and Created Event app/Http/Controllers/PostController.php
<?php
  
namespace App\Http\Controllers;
  
use App\Models\Post;
use Illuminate\Http\Request;
  
class PostController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        Post::create([
            'title' => 'Laravel',
            'body' => 'This is a PHP Framework.'
        ]);
  
        dd('done');
    }
}
Output Log File:
[2020-10-20 14:37:26] local.INFO: Creating event call: {"title":"Laravel","body":"This is a PHP Framework."}  
[2020-10-20 14:37:26] local.INFO: Created event call: {"title":"Laravel","body":"This is a PHP Framework.","slug":"laravel","updated_at":"2022-03-12T14:37:26.000000Z","created_at":"2022-03-12T14:37:26.000000Z","id":1}  
Step 4: Update Record: Updating and Updated Event app/Http/Controllers/PostController.php
<?php
  
namespace App\Http\Controllers;
  
use App\Models\Post;
use Illuminate\Http\Request;
  
class PostController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        Post::find(1)->update([
            'title' => 'Laravel updated',
            'body' => 'This is a PHP Framework updated'
        ]);
   
        dd('done');
    }
}    
Output Log File:
[2020-10-20 14:39:04] local.INFO: Updating event call: {"id":1,"title":"Laravel updated","body":"This is a PHP Framework updated","created_at":"2022-03-20T14:45:26.000000Z","updated_at":"2022-03-20T14:37:26.000000Z","slug":"silver"}  
[2020-10-20 14:39:04] local.INFO: Updated event call: {"id":1,"title":"silver updated","body":"This is a PHP Framework updated","created_at":"2022-03-20T14:37:26.000000Z","updated_at":"2022-03-20T14:39:04.000000Z","slug":"silver-updated"}   
Step 5: Delete Record: Deleted Event app/Http/Controllers/PostController.php
<?php
  
namespace App\Http\Controllers;
  
use App\Models\Post;
use Illuminate\Http\Request;
  
class PostController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        Post::find(1)->delete();
   
        dd('done');
    }
}    
Output Log File:
[2020-10-21 03:14:45] local.INFO: Deleted event call: {"id":1,"title":"laravel updated","body":"This is a PHP Framework updated","created_at":"2020-10-20T14:37:26.000000Z","updated_at":"2020-10-20T14:39:04.000000Z","slug":"silver-updated"}  

Now you can check from your end.

I hope it can help you...

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