laravel-5.5使用 permission 出现 Column 'model_id' cannot be null?

Question

错误信息 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'model_id' cannot be null (SQL: insert into `ks_model_has_permissions` (`model_id`, `model_type`, `permission_id`) values (, App\User, 2)) 调下面这句出现的错误 $user->givePermissionTo('add articles'); 详细代码片段 appUser.php <?php namespace App; use Illuminate\Notifications\Notifiable; use Illuminate\Foundation\Auth\User as Authenticatable; use Spatie\Permission\Traits\HasRoles; class User extends Authenticatable { use Notifiable; use HasRoles; protected $fillable = [ 'name', 'email', 'password', ]; protected $hidden = [ 'password', 'remember_token', ]; } appHttpControllersHomeController.php <?php namespace App\Http\Controllers; use Illuminate\Http\Request; use Spatie\Permission\Models\Role; use Spatie\Permission\Models\Permission; use app\User; class HomeController extends Controller { public function __construct() { $this->middleware('auth'); } public function index(User $user) { $user->givePermissionTo('add articles'); } }

Answer 1

$user = User::findOrFail($id); //$id 指的是users的ID，也就是用户ID

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那么model_id指的是什么? 就是App\User User模型的ID

相关资料

资料1
资料2

Answer 2

 Column 'model_id' cannot be null (SQL: insert into `ks_model_has_permissions` (`model_id`, `model_type`, `permission_id`) values (, App\User, 2))

• 很明显了啊 model_id 字段不能为空，你看看你 SQL : values (, App\User, 2)

Answer 3

values ('', AppUser, 2) 没有用过，但没值也给传个空的吧