功能在模型内部更新时没有被触发-PHP中文网问答

我有一个像这样的模型：

class Equipment extends Model
{
    use HasFactory,softDeletes;
    protected $table = 'equipments';
    protected $fillable = ['station_id', 'parent_id', 'code', 'name', 'description', 'creator_id','deletor_id','updator_id'];
    protected $softDelete = true;

    protected $dates = ['deleted_at'];

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

 //it doesn't called at all!
        static::updated(function (Model $model) {
            Log::error('calling refreshTree');
            $model->refreshTree();
        });


        static::created(function (Model $model) {
            $model->refreshTree();
        });



        static::deleted(function (Model $model) {
            $model->refreshTree();
        });

    }


    public function refreshTree(){
        Log::error('refreshTree');
        $equipment = DB::table('equipments')->get();
        $treeData = $this->generateTree($equipment);

        $jsonData = json_encode($treeData);
        Redis::set(config('redis.EquipmentTree'),$jsonData);
    }

    private function generateTree($data, $parentId = 0) {
        $tree = [];

        foreach ($data as $item) {
            if ($item->parent_id == $parentId) {
                $children = $this->generateTree($data, $item->id);


                $node = [
                    'id' => $item->id,
                    'text' => $item->name,
                    'editURL'=>route('dashboard.basic-info.equipments.edit',['id'=>$item->id]),
                    'children' => $children
                ];
                if(count($children) <= 0)
                    unset($node['children']);

                array_push($tree, $node);
            }
        }

        return $tree;
    }

}

当我创建模型时，创建函数被触发，但当我更新模型时，更新函数没有被触发

//Equipment::where('id',$id)->update(['parent_id'=>$recordTarget['id']]); //它没有生效
//我也尝试了这个:
            $equipment = Equipment::find($id);
            $equipment->parent_id = $recordTarget['id'];
            $equipment->save();

全部回复(1)

P粉1655228862023-08-09 09:30:12 1楼

当使用查询构建器实例或批量更新时，即使你只针对一行进行操作，事件监听器也不会触发

Equipment::where('id',$id) //right here you get a Builder instance
    ->update([]); //will not trigger the event listener as it is a mass update

要触发它，你需要使用模型实例

Equipment::where('id',$id)->first() //This returns a model instance
    ->update([]); //will trigger the event listener as it is a single instance update

这也等同于

$equipment = Equipment::find($id);
$equipment->parent_id = ..;
$equipment->save();

并且你可以看到，在模型上调用update()与在查询构建器上调用update()是不同的。

当你考虑到，要触发这些事件，代码需要一个模型的实例来与之一起工作，就像static::updated(function (Model $model) {那样。如果你的查询不同，例如Equipment::where('id','>',$id)，为了处理所有事件，它需要查询所有受影响的行，为它们生成模型实例，然后使用这些模型调用事件。

这会降低性能

但是如果没有其他办法，你可以明确地这样做

$equipments = Equipment::where('id','>',$id)->get();
foreach ($equipments as $equipment) {
    $equipment->update(['parent_id'=>$recordTarget['id']]);
}

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