laravel withCount 统计关联数量

roleModel定义关联 hasmany 

public function users(){

	return $this->hasMany('App\Models\Users', 'role_id', 'role_id');

}

return  $this->query()->withCount("users")->get();

　　

　　

 

统计关联数量，单个用法

$posts = Post::withCount('comments')->orderBy('id','desc')->paginate(6);

多个用法

$posts = Post::withCount(['comments','zans'])->orderBy('id','desc')->paginate(6);

调用

$post->comments_count