| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  |  * @author Anton Tuyakhov <[email protected]> | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  | namespace tuyakhov\jsonapi\actions; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  | use tuyakhov\jsonapi\ResourceInterface; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  | use yii\data\ActiveDataProvider; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  | use yii\db\BaseActiveRecord; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  | use yii\web\BadRequestHttpException; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | use yii\web\NotFoundHttpException; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  | use Yii; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |  * UpdateRelationshipAction implements the API endpoint for updating relationships. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  |  * @link http://jsonapi.org/format/#crud-updating-relationships | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  | class UpdateRelationshipAction extends Action | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |      * Update of relationships independently. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |      * @param string $id an ID of the primary resource | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |      * @param string $name a name of the related resource | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |      * @return ActiveDataProvider|BaseActiveRecord | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |      * @throws BadRequestHttpException | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |      * @throws NotFoundHttpException | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |     public function run($id, $name) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |         /** @var BaseActiveRecord $model */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |         $model = $this->findModel($id); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |         if (!$related = $model->getRelation($name, false)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |             throw new NotFoundHttpException('Relationship does not exist'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |         if ($this->checkAccess) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |             call_user_func($this->checkAccess, $this->id, $model, $name); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |         $this->linkRelationships($model, [$name => Yii::$app->getRequest()->getBodyParams()]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |         if ($related->multiple) { | 
                            
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                | 45 |  |  |             return new ActiveDataProvider([ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  |                 'query' => $related | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |             ]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |         } else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |             return $related->one(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  | } | 
            
                        
If you access a property on an interface, you most likely code against a concrete implementation of the interface.
Available Fixes
Adding an additional type check:
Changing the type hint: