Question

我的Yii2应用程序中有两个模型：

  Racks(rackID,rowID,...)
  RackObjects(rack_objectID,rackID,objectID,...)

在我的机架控制器中，我有：

public function actionUpdate($id)
{
    $model = $this->findModel($id);
    $modelsRackObjects = $model->rackObjects;

    if ($model->load(Yii::$app->request->post())) {

        $oldIDs = ArrayHelper::map($modelsRackObjects, 'rack_objectID', 'rack_objectID');
        $modelsRackObjects = Racks::createMultiple(RackObjects::classname(), $modelsRackObjects);
        Racks::loadMultiple($modelsRackObjects, Yii::$app->request->post());
        $deletedIDs = array_diff($oldIDs, array_filter(ArrayHelper::map($modelsRackObjects, 'rack_objectID', 'rack_objectID')));

        // validate all models
        $valid = $model->validate();
        $valid = Racks::validateMultiple($modelsRackObjects) && $valid;

        if ($valid) {
            $transaction = \Yii::$app->db->beginTransaction();
            try {
                if ($flag = $model->save(false)) {
                    if (!empty($deletedIDs)) {
                        Racks::deleteAll(['rackID' => $deletedIDs]);
                    }
                    foreach ($modelsRackObjects as $modelRackObjects) {
                        $modelRackObjects->rackID = $model->rackID;
                        if (! ($flag = $modelRackObjects->save(false))) {
                            $transaction->rollBack();
                            break;
                        }
                    }
                }
                if ($flag) {
                    $transaction->commit();
                    return $this->redirect(['view', 'id' => $model->rackID]);
                }
            } catch (Exception $e) {
                $transaction->rollBack();
            }
        }
    }

    return $this->render('update', [
        'model' => $model,
        'modelsRackObjects' => (empty($modelsRackObjects)) ? [new RackObjects] : $modelsRackObjects
    ]);
}

在我的＆＃34; Racks Model＆＃34;我有：

public static function createMultiple($modelClass, $multipleModels = [])
{
    $model    = new $modelClass;
    $formName = $model->formName();
    $post     = Yii::$app->request->post($formName);
    $models   = [];

    if (! empty($multipleModels)) {
        $keys = array_keys(ArrayHelper::map($multipleModels, 'rack_objectID', 'rack_objectID'));
        $multipleModels = array_combine($keys, $multipleModels);
    }

    if ($post && is_array($post)) {
        foreach ($post as $i => $item) {
            if (isset($item['rack_objectID']) && !empty($item['rack_objectID']) && isset($multipleModels[$item['rack_objectID']])) {
                $models[] = $multipleModels[$item['rack_objectID']];
            } else {
                $models[] = new $modelClass;
            }
        }
    }

    unset($model, $formName, $post);

    return $models;
}

当我更新机架表格并更改一些rackObjects时，我收到此错误：

完整性约束违规 - yii \ db \ IntegrityException SQLSTATE [23000]：完整性约束违规：1451无法删除或更新父行：外键约束失败

我的动作更新有什么问题???

由于this answer我改变了我的代码，现在当我更新记录时，子表（rackObjects）重复，旧记录没有删除!!任何想法？

Answer 1

deleteAll()不会引发beforeDelete事件。你应该循环：

$racks = Rack::findAll(['rackID' => $deletedIDs]);
foreach($racks as $rack) {
  $rack->delete();
}

在Rack模型中，假设您与hasMany有RackObjects的关系

public function beforeDelete() {
  if (parent::beforeDelete()) {
    foreach($this->rackObjects as $rackObj) {
      $rackObj->delete();
    }
    return true;
  } else {
    return false;
  }
}

Yii2动态表单操作更新获取错误

1 个答案: