我有帶有表格的 Role 和 DocType 模型。DocTypes 必須由特定角色批準，并由另一個特定角色創建。這是表結構：Rolesid | nameDocTypesid | name | author_id | approveddocTypes_roles_tabledoc_type_id | role_id| role_type這是我的代碼：在 AppServiceProvider 類中：public function boot() { Schema::defaultStringLength(191); Relation::morphMap([    'approve' => 'App\Models\Role',    'create' => 'App\Models\Role', ]);}在角色類public function docTypes() {    return $this->morphToMany('App\Models\DocType', 'role','doc_type_role');    }在 DocType 類中/**     * Get the polymorphic relation with roles table     *     * @return \Illuminate\Database\Eloquent\Relations\MorphToMany     */    public function roles() {        return $this->morphedByMany('App\Models\Role', 'role','doc_type_role')->withPivot('role_type');    }    /**     * Get roles which must approve the docType     *     * @return \Illuminate\Database\Eloquent\Relations\MorphToMany     */    public function approveRoles() {        return $this->roles()->wherePivot('role_type','approve')->withPivot('sequence')->orderBy('sequence');    }    /**     * Get roles which create the docType     *     * @return \Illuminate\Database\Eloquent\Relations\MorphToMany     */    public function createRoles() {        return $this->roles()->wherePivot('role_type','create');    }但是當我將角色附加到createRoles()它時，保存到數據庫“批準”類型。$trip = User::find(1)->docTypes()->create([    "name"         => "business_trip",    "display_name" => "Business Trip",]);$trip->approveRoles()->sync([    2 => ['sequence' => 1],]);$trip->createRoles()->attach([5,3]);