时间戳

首页 > 解决方案 > Laravel 大规模更新，依然火的事件

laravel - Laravel 大规模更新，依然火的事件

问题描述

如文档中所述，laravel 不会在批量更新/插入/删除时触发事件。 https://laravel.com/docs/5.8/eloquent#events

它为此使用 Builder 并且不会触发事件。

例如，有没有办法在大规模更新后仍然可以触发事件？我只需要查询生成器自己提取所需的信息（日志目的）。

标签： laraveleloquent

解决方案

这实际上是可能的，但是您必须扩展 Eloquent 构建器，覆盖更新/插入方法并将事件发送到那里。一直在玩它......需要工作，但基本思想如下：

class Test extends Model
{
    protected $guarded = [];

    public $dispatchesEvents = [
        'saved' => SavedTest::class
    ];


    /**
     * INCLUDE this as a trait in your model.
     * Overwrite the eloquentBuilder.
     *
     * @param  \Illuminate\Database\Query\Builder  $query
     * @return \Illuminate\Database\Eloquent\Builder|static
     */
    public function newEloquentBuilder($query)
    {

        return new TestBuilder($query);
    }


}

扩展 eloquent builder...

class TestBuilder extends Builder
{

    /**
     * Update a record in the database and fire event.
     *
     * @param  array  $values
     * @return int
     */
    public function update(array $values)
    {

        // normal eloquent behavior.
        $result =$this->toBase()->update($this->addUpdatedAtColumn($values));

        /*
         * Fire event.
         */
        if($result){
            if( $event = Arr::get($this->model->dispatchesEvents,'saved')){

                 // at the attributes.
                $this->model->fill($this->addUpdatedAtColumn($values));

                $queryBuilder =$this->toBase();

                event(new $event($this->model,$queryBuilder));
            }

        }

    }

    public function insert(array $values)
    {

       // same idea..
    }
}

事件类：

class SavedTest
{
    use SerializesModels;
    public $model;
    public $query;

    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct($model,$query =null)
    {
        $this->model = $model;
        $this->query = $query;
    }


}

听者。

class SavedTestEvent
{


    /**
     * Create the event listener.
     *
     * 
     */
    public function __construct()
    {

    }

    /**
     * Handle the event.
     *
     * @param  object  $event
     * @return void
     */
    public function handle($event)
    {

        // The model , with the attributes.
        dump($event->model);

       // the query builder , you could extract the wheres or whatever to build your own log for it.
      dump($event->query); 


    }
}

推荐阅读