[PHP知识库]无涯教程: Laravel 8 - 模型事件

在这里，我将向您展示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，我们将使用事件创建Product模型。所以让我们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:

https://www.learnfk.com/article-how-to-use-model-events-in-laravel-8example

[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"}