多次射击的Laravel事件应该只会被激活一次

Question

我有一个名为Project的模型，它有一些像这样的模型事件设置，

class Project extends Eloquent {
    public static function boot()
    {
        parent::boot();
        // new project created
        static::created(function($project)
        {
             // create the data informing the client to pull the new project information
             $pullData = [
                'id' => $project->id,
                'item' => 'project',
                'type' => 'created',
                'interface' => '/project/basic/'.$project->id
            ];
            foreach($project->organisation->users as $user) {
                if ($user->id != $project->user_id)
                    Pusherer::trigger('private-user'.$user->id, 'project:createdPull', $pullData);
                }
            }

            Event::subscribe(new ProjectEventHandler);
            Event::fire('project.create', array($project));

            Event::fire('project.create', array($project));
            Event::forget('project.create');


            Event::subscribe(new OrganisationEventHandler);
            Event::fire('organisation.project.add', array($project,  $project->organisation, $project->user));
            Event::forget('organisation.project.add');
    });
}

我创建了一个这样的项目，

    $project = new Project;
    $project->name = $this->first_name . "'s example project";
    $project->slug = Stringhelpers::_uriHash( time() . $project->name );
    $project->uri_hash = Stringhelpers::_slugify($project->name);
    $project->total_cost = "1000.00";
    $project->start_date = date('Y-m-d H:i:s', time());
    $project->finish_date = date('Y-m-d H:i:s', strtotime('+1 month'));
    //$project->owner_id = $this->id;
    $project->client_id = $client->id;
    $project->status = 2;
    $project->user_id = $this->id;
    $project->organisation_id = $organisation->id;
    $project->archived_at = "0000-00-00 00:00:00";
    //$project->socketId = $this->socketId;

    //Add the created user to the project as a just watcher.
    //$project->flushEventListeners();

    if($project->save()) {
        $project->users()->attach(array($this->id => array('role' => 3, 'last_tab' => 'home')));
    }

在我看来，这应该在模型上触发一次创建的事件，并且每个订阅的事件一次，但是它会使事件或创建的事件被激活3次，是否有理由这样做？

=======进一步详情======

我在我的进程中保存了多个模型，我注意到我在之前的保存时会触发多个事件，所以我执行以下操作，我也得到了Item事件，

$project = new Project;
    $project->name = $this->first_name . "'s example project";
    $project->slug = Stringhelpers::_uriHash( time() . $project->name );
    $project->uri_hash = Stringhelpers::_slugify($project->name);
    $project->total_cost = "1000.00";
    $project->start_date = date('Y-m-d H:i:s', time());
    $project->finish_date = date('Y-m-d H:i:s', strtotime('+1 month'));
    //$project->owner_id = $this->id;
    $project->client_id = $client->id;
    $project->status = 2;
    $project->user_id = $this->id;
    $project->organisation_id = $organisation->id;
    $project->archived_at = "0000-00-00 00:00:00";
    //$project->socketId = $this->socketId;

    //Add the created user to the project as a just watcher.
    //$project->flushEventListeners();

    if($project->save()) {
        $project->users()->attach(array($this->id => array('role' => 3, 'last_tab' => 'home')));
    }

$item = new Item;
    $item->name = $this->first_name . "'s example item";
    $item->percentage_complete = 0;
    $item->project_id = $project->id;
    $item->workflow_id = 0;
    $item->user_id = $this->id;
    $item->start_date = $project->start_date;
    $item->finish_date = $project->finish_date;
    //$item->socketId = $this->socketId;
    //$item->flushEventListeners();
    $item->save();

我的项目模型看起来像这样，

public class Item extends Eloquent {

public static function boot() { 

        parent::boot();

        // new item created 
        static::created(function($item) {
            // fire project pusher events
            Pusherer::trigger('project_'.$item->project_id, 'item:created', $item, $item->socketId);

            Log::info("ITEM CREATE CALLBACK STARTED");
            // fire off notifications and activity feeds
            Event::subscribe( new ProjectEventHandler );
            Event::fire('item.create', $item);
            // Event::forget('item.created');
            Log::info("ITEM CREATE CALLBACK FINISHED");
        });
}
}

为什么每次保存时都会聚集我的事件？