Laravel 5.4 User模型无法使用can()方法，说方法不存在

Question

在PostController创建帖子：

public function store(PostRequest $request, Topic $topic)
{
    // Get user id.
    $user = Auth::user();
    if ($user->can('create')) {
        //
    }
}

相关策略：

class PostPolicy extends Policy
{
    public function before(User $user)
    {
        if ($user->status > 0) {
            return true;
        }
    }

    public function create(User $user)
    {
        return true;
    }
}

报错：
Call to undefined method Illuminate\Database\Query\Builder::can()

Answer 1

在User类中需要添加Authorizable Trait。

use Illuminate\Foundation\Auth\Access\Authorizable;

class User implements Authenticatable, CanResetPassword
{
    use Authorizable;
    ...