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Handling tabular data loading and validation in Yii 2
How do you read and handle tabular data submission via form in Yii framework 2.0? Sometimes we want to collect user input in a batch mode. That is, the user can enter the information for multiple model instances and submit them all at once. We call this tabular input because the input fields are often presented in an HTML table.
Tabular Input Solution
If you are coming over from Yii 1 – the concepts of tabular data handling remain the same as mentioned in the Yii 1.x guide – collecting tabular input section.
The only differences in Yii 2 is that its much simpler due to available functions in the Model class for loading and validating models.
Option 1: Use a prebuilt solution
You can use a prebuilt solution to render and manage tabular data. You can use the TabularForm widget from Krajee’s yii2-builder extension package. Refer details of the TabularForm widget here.
Option 2: Doing it yourself
You can use the same concepts as mentioned in the guide link mentioned before – here are the changes you need to do for Yii 2:
To work with tabular input, we first need to create or populate an array of model instances, depending on whether we are inserting or updating the data. We then retrieve the user input data from the $_POST variable and assign it to each model. A slight difference from single model input is that we retrieve the input data using $_POST['ModelClass'][$i] instead of $_POST['ModelClass'].
Controller
Your controller can include a batch update action as shown below:
use yiibaseModel; public function actionBatchUpdate() // retrieve items to be updated in a batch mode // assuming each item is of model class 'Item' $items=$this->getItemsToUpdate(); if (Model::loadMultiple($items, Yii::$app->request->post()) && Model::validateMultiple($items)) $count = 0; foreach ($items as $item) // populate and save records for each model if ($item->save()) // do something here after saving $count++; Yii::$app->session->setFlash('success', "Processed $count records successfully."); return $this->redirect(['index']); // redirect to your next desired page else return $this->render('update', [ 'items' => $items, ]);
View
A sample code for your view file:
<div class="form"> <?php $form = ActiveForm::begin(); ?> <table> <tr><th>Name</th><th>Price</th><th>Count</th><th>Description</th></tr> <?php foreach($items as $i=>$item): ?> <tr> <td><?= $form->field($item,"[$i]name"); ?></td> <td><?= $form->field($item,"[$i]price"); ?></td> <td><?= $form->field($item,"[$i]count"); ?></td> <td><?= $form->field($item,"[$i]description"); ?></td> </tr> <?php endforeach; ?> </table> <?= Html::submitButton('Save'); ?> <?php ActiveForm::end(); ?> </div><!-- form -->