Laravel关联创建时如何按参数屏蔽Observer的created事件

问题描述 #

需要根据传入的link_social参数控制CreatorObserver的created()方法触发逻辑：当参数为false时，阻止该方法执行。

最初编写的代码如下：

$role = $request->role == 'creator' ? 'creator' : 'sponsor';

if($request->link_social == true){
    $user = Auth::user()->$role()->create([
        'name' => $request->safe()->name,
        'about' => $request->safe()->about,
        'account_plan_id' => $accountPlan->id,
    ]);
} else{
    $user = Auth::user()->$role()->create([
        'name' => $request->safe()->name,
        'about' => $request->safe()->about,
        'account_plan_id' => $accountPlan->id,
    ])->saveQuietly();
}

执行时出现错误：

"message": "Call to undefined method App\Models\Creator::saveQuitely()"

且即使参数为false，CreatorObserver的created()事件依然会触发，该事件会在SocialPlatform表中创建记录。期望实现类似$user->role->create()->saveQuietly()的效果。

相关代码片段 #

CreatorObserver

class CreatorObserver
{
    /**
     * Handle the Creator "created" event.
     *
     * @param  \App\Models\Creator  $creator
     * @return void
     */
    public function created(Creator $creator)
    {
        if ($creator->user->social_identifier['platform'] === PlatformType::Google->value) {
            $youtube = new YoutubeService($creator->user->social_identifier);
            SocialPlatform::createFor($creator, $youtube);
        }
    }
}

User模型

public function sponsor()
{
    return $this->hasOne(Sponsor::class);
}

public function creator()
{
    return $this->hasOne(Creator::class);
}

Creator模型

class Creator extends Model
{
    use HasFactory;

    protected $guarded = [];

    public function user()
    {
        return $this->belongsTo(User::class);
    }

    public function socialPlatforms()
    {
        return $this->hasMany(SocialPlatform::class);
    }
}

解决方案 #

错误原因 #

1. 拼写错误：调用的saveQuitely()是拼写错误，正确方法名为saveQuietly()（注意是quietly）。
2. 逻辑错误：create()方法会直接触发created事件并返回已保存的模型实例，此时调用saveQuietly()无意义，模型已完成创建。

正确实现方式 #

方式一：用withoutEvents()临时禁用事件

通过withoutEvents()闭包包裹创建逻辑，临时跳过所有模型事件（包括观察者的created方法）：

$role = $request->role == 'creator' ? 'creator' : 'sponsor';

if($request->link_social == true){
    $user = Auth::user()->$role()->create([
        'name' => $request->safe()->name,
        'about' => $request->safe()->about,
        'account_plan_id' => $accountPlan->id,
    ]);
} else{
    // 临时禁用模型事件
    $user = Creator::withoutEvents(function () use ($request, $accountPlan) {
        return Auth::user()->creator()->create([
            'name' => $request->safe()->name,
            'about' => $request->safe()->about,
            'account_plan_id' => $accountPlan->id,
        ]);
    });
}

若$role可能为sponsor且对应有观察者，需根据实际情况调整闭包内的模型类。

方式二：在观察者内部添加判断逻辑

给Creator模型添加临时属性，在观察者中根据属性控制逻辑：

1. 创建模型时传递标识：

$role = $request->role == 'creator' ? 'creator' : 'sponsor';

$attributes = [
    'name' => $request->safe()->name,
    'about' => $request->safe()->about,
    'account_plan_id' => $accountPlan->id,
];

// 添加临时属性，不会存入数据库
$creator = new Creator($attributes);
$creator->skip_link_social = !$request->link_social;

Auth::user()->creator()->save($creator);

2. 修改CreatorObserver的created方法：

public function created(Creator $creator)
{
    // 标记为跳过则直接返回
    if (isset($creator->skip_link_social) && $creator->skip_link_social) {
        return;
    }

    if ($creator->user->social_identifier['platform'] === PlatformType::Google->value) {
        $youtube = new YoutubeService($creator->user->social_identifier);
        SocialPlatform::createFor($creator, $youtube);
    }
}

方案推荐 #

• 仅需临时跳过观察者事件，选方式一更简洁；
• 需要灵活扩展逻辑判断，选方式二扩展性更强。

内容的提问来源于stack exchange，提问作者Vince