Laravel 5：级联软删除

Question

我有 offers 和 services 表。

服务是优惠的子项。到目前为止，我已经建立了软删除报价的功能。我还将如何软删除附加的服务？这是我的代码：

移民优惠

Schema::create('offers', function(Blueprint $table)
{
    $table->increments('id')->unsigned();
    ...    
    $table->timestamps();
    $table->softDeletes();
});

移民服务

Schema::create('services', function(Blueprint $table) 
{
    $table->increments('id');
    $table->integer('offer_id')->unsigned();   
    ...
    $table->timestamps();
    $table->softDeletes();
});

Schema::table('services', function($table) 
{
    $table->foreign('offer_id')
          ->references('id')
          ->on('offers');
});

模型报价

use SoftDeletes;
protected $dates = ['deleted_at'];

public function services() {
    return $this->hasMany('App\Service');
} 

模型服务

public function offer() {
    return $this->belongsTo('App\Offer');
} 

删除方法

public function destroy($id)
{
    $offer = Offer::find($id);
    $offer->delete();
}

感谢大家的帮助。

Answer 1

我已将此代码放入 Offer 模型中：

protected static function boot() {
    parent::boot();

    static::deleting(function($offer) {
        $offer->services()->delete();
    });
}

并添加了缺失的

use SoftDeletes;
protected $dates = ['deleted_at'];

在服务模型中。

Answer 2

您应该为此使用Eloquent events。

Offers::deleted(function($offer) {
    $offer->services()->delete();
});

Offers::restored(function($offer) {
    $offer->services()->withTrashed()->restore();
});

Answer 3

如果你想在你的 Eloquent 模型中获得级联的 softDeletes，我强烈推荐使用这个库 iatstuti/laravel-cascade-soft-deletes

作曲家

// get it with composer.
$ composer require iatstuti/laravel-cascade-soft-deletes="1.0.*"

快速示例

入门示例中提供的那个。

<?php

namespace App;

use App\Comment;
use Iatstuti\Database\Support\CascadeSoftDeletes;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class Post extends Model
{
    use SoftDeletes, CascadeSoftDeletes;

    protected $cascadeDeletes = ['comments'];

    protected $dates = ['deleted_at'];

    public function comments()
    {
        return $this->hasMany(Comment::class);
    }
}  

Answer 4

你可以这样做。

self::deleting(function($offer) {
    $offer->services()->delete();
});

self::restoring(function ($offer) {
   $offer->services()->restore();
});

您应该先删除/恢复子记录（服务），然后再删除/恢复父记录（报价）。如果不这样做，将触发引用完整性 MySql 错误。