Do not create new model via 'createMultiple' method, but use existing when update is required

[just-greg-me]

We we create new model the Yii validator is see that it's new, and the validators see this like new model, so, we can't work clearly with unique fields

[pczi]

I had the same problem, everything works fine if you respect the following 3 points: (1) Don't forget to put the hidden "id" field in the dynamic part of your form. (2) In actionUpdate, first populate with the old records: $modelActions = $model->inspectActions; (3) Then use the $pk parameter of the createMultiple like this (attention, $pk defaults to 'id' so set this parameter if your pk is different, mine is ID_Action): $oldIDs = ArrayHelper::getColumn($modelActions, 'ID_Action'); $modelActions = Model::createMultiple(Actions::classname(), $modelActions, 'ID_Action'); Model::loadMultiple($modelActions, Yii::$app->request->post()); $deletedIDs = array_diff($oldIDs, array_filter(ArrayHelper::getColumn($modelActions, 'ID_Action')));

-> createMultiple will then match the dynamic models by their Primarykey and create new ones if you added some records dynamically.

[marcinmisiak]

I think You need add PK in $model[] in foreach (line 35, 38) `<?php

namespace app\modules\portfolio\models;

use Yii; use yii\helpers\ArrayHelper;

class Model extends \yii\base\Model { /**

• Creates and populates a set of models.
• @author Marcin Misiak : add Primary Key to foreach loop $models[$i]; line: 35, 38
• @param string $modelClass
• @param array $multipleModels

• @return array */ 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, 'id', 'id'));
     $multipleModels = array_combine($keys, $multipleModels);
  }
  
  if ($post && is_array($post)) {
      foreach ($post as $i => $item) {
  
          if (isset($item['id']) && !empty($item['id']) && isset($multipleModels[$item['id']])) {
              $models[$i] = $multipleModels[$item['id']];
  
          } else {
              $models[$i] = new $modelClass;
  
          }
      }
  }
  
  unset($model, $formName, $post);
  
  return $models;

  } }`