How to reference grid to ActiveForm - yii2

Question

You have on one page ActiveForm as master record, and grid as child records, how can i make relation between them. At create time there isn't id of master record! Any advice is wellcome! TIA. Asim

Answer 1

There is no need to use modal in order to add the child object. You can do it in one form. If you use a modal, you'll need to create the parent object first, and then allow this modal to be shown. In this way, your worries will be invalid.
If you want to add a parent and a child in one form, you can pass both objects to the view and then put their fields in the form. Then on form submit, you validate both objects, and then if everything is fine, save the parent, and then the child, assigning the parent id to the child. You can do this in a transaction so that if the child fails, the parent won't be recorded as well or vise versa.
Here is some code:
class YourController extends Controller
{
public function actionSomething()
{
$parent = new Parent();
$child = new Child();
$request = Yii::$app->request;
if ($parent->load($request->post('Parent')) && $child->load($request->post('Child'))) {
// Do validation and if everything is fine, then save the fields
Yii::$app->db->transaction(function() {
$parent->save(false);
$child->parent_id = $parent->id;
$child->save(false);
});
}
return $this->render('view', compact('parent', 'child'));
}
}
The view:
$form = ActiveForm::begin() ?>
<?= $form->field($parent, 'fieldA') ?>
<?= $form->field($parent, 'fieldB') ?>
<?= $form->field($child, 'fieldA') ?>
<?= $form->field($child, 'fieldB') ?>
...other input fields...
<?= Html::submitButton('Save', ['class' => 'btn btn-primary']) ?>
Did you get the idea? If you have questions or problems, please ask. Here is another example. This is with an update, but the idea is the same:
Getting Data for Multiple Models