Laravel 8 - 模型事件

在这里，无涯教程将向您展示laravel 8模型事件。Laravel提供eloquent模型事件列表，每个模型事件都有自己的函数。

• creating          -  插入前调用。
• creating           -  插入后调用。
• updating          -  更新前调用。
• updated            -  更新后调用。
• deleting            -  删除前调用。
• deleted             -  删除后调用。
• retriveved       -  从数据库查询数据时调用。
• saving               -  创建或更新前调用。
• saved                 -  创建或更新后调用。
• restoring         - 在恢复前调用。
• restored          -  恢复后调用。
• replicating     - 调用重复数据。

创建Product Model

在这里，无涯教程将使用事件创建Product模型。所以一起创建并写入以下代码:

app/Models/Product.php

<?php
  
namespace App\Models;
  
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Log;
use Str;
   
class Product extends Model
{
    use HasFactory;
  
    protected $fillable = [
        'name'， 'slug'， 'detail'
    ];
  
    /**
     * 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->name);
        });
  
        /** 
         * 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); 
        });
    }
}

创建记录:Creating和Created事件

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::create([
            'name' => 'silver'，
            'detail' => 'This is silver'
        ]);
  
        dd('done');
    }
}

输出日志文件:

[2020-10-20 14:37:26] local.INFO: Creating event call: {"name":"silver"，"detail":"This is silver"}  
[2020-10-20 14:37:26] local.INFO: Created event call: {"name":"silver"，"detail":"This is silver"，"slug":"silver"，"updated_at":"2020-10-20T14:37:26.000000Z"，"created_at":"2020-10-20T14:37:26.000000Z"，"id":5}  

更新记录:Updating和Updated事件

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::find(5)->update([
            'name' => 'silver updated'，
            'detail' => 'This is silver'
        ]);
   
        dd('done');
    }
}

输出日志文件:

[2020-10-20 14:39:04] local.INFO: Updating event call: {"id":5，"name":"silver updated"，"detail":"This is silver"，"created_at":"2020-10-20T14:37:26.000000Z"，"updated_at":"2020-10-20T14:37:26.000000Z"，"slug":"silver"}  
[2020-10-20 14:39:04] local.INFO: Updated event call: {"id":5，"name":"silver updated"，"detail":"This is silver"，"created_at":"2020-10-20T14:37:26.000000Z"，"updated_at":"2020-10-20T14:39:04.000000Z"，"slug":"silver-updated"}   

删除记录:Deleted事件

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::find(5)->delete();
   
        dd('done');
    }
}

输出日志文件:

[2020-10-21 03:14:45] local.INFO: Deleted event call: {"id":5，"name":"silver updated"，"detail":"This is silver"，"created_at":"2020-10-20T14:37:26.000000Z"，"updated_at":"2020-10-20T14:39:04.000000Z"，"slug":"silver-updated"}