Yii2: How to validate relation? - validation

Question

I have a model with the relation called "reviews":
class ReportStructure extends \yii\db\ActiveRecord
{
const REVIEW_LIST_NAME = 'reviews';
public function getReviewList()
{
return $this->hasOne(FileIndexList::className(), ['id_owner' => 'id_report'])
->where('list_name = :list_name', [':list_name' => self::REVIEW_LIST_NAME]);
}
public function getReviews()
{
return $this->hasMany(FileIndex::className(), ['id_file_index' => 'id_file_index'])->via('reviewList');
}
}
In View, the reviews are displayed by GridView widget. The user can add or delete reviews by the other View. The user should specify at least one review. I added the validation rule to the model:
public function rules()
{
return [
['reviews', 'checkReviews'],
];
}
public function checkReviews($attribute)
{
if (count($this->reviews) === 0) {
$this->addError($attribute, 'You should add at least one review');
}
}
But it seems that rule even not fired.
public function actionIndex($idSupply, $restoreTab = false) {
$this->initData($idSupply, $report, $reestrData, $structure, $elements);
$ok = $report->load(Yii::$app->request->post()) &&
$reestrData->load(Yii::$app->request->post()) &&
Model::loadMultiple($elements, Yii::$app->request->post());
if($ok) {
$ok = $report->validate() &&
$reestrData->validate() &&
Model::validateMultiple($elements) &&
$structure->validate();
if($ok) {
$report->id_status = Status::STATUS_VERIFIED;
$this->saveData($report, $reestrData, $structure, $elements);
return $this->redirect(['supplies/update', 'id' => $idSupply]);
}
}
return $this->render('index', [
'structure' => $structure,
'report' => $report,
'reestrData' => $reestrData,
'elements' => $elements,
'restoreTab' => $restoreTab
]);
}
That's how the data is initialized. $elements are the objects of one class, I use tabular input for them.
private function initData($idSupply, &$report, &$reestrData, &$structure, &$elements) {
$report = \app\models\Reports::findOne($idSupply);
$reestrData = \app\models\ReestrData::findOne($report->id_reestr_data);
$structure = \app\models\report\ReportStructure::findOne($report->id_supply);
$elements = [
'titleIndex' => FileIndex::getInstance($structure->id_title_index, $structure->getAttributeLabel('id_title_index')),
'abstractIndex' => FileIndex::getInstance($structure->id_abstract_index, $structure->getAttributeLabel('id_abstract_index')),
'technicalSpecificationIndex' => FileIndex::getInstance($structure->id_technical_specification_index, $structure->getAttributeLabel('id_technical_specification_index')),
'contentsIndex' => FileIndex::getInstance($structure->id_contents_index, $structure->getAttributeLabel('id_contents_index')),
'imageListIndex' => FileIndex::getInstance($structure->id_image_list_index, $structure->getAttributeLabel('id_image_list_index'), false),
'tableListIndex' => FileIndex::getInstance($structure->id_table_list_index, $structure->getAttributeLabel('id_table_list_index'), false),
'textAnnexListIndex' => FileIndex::getInstance($structure->id_text_annex_list_index, $structure->getAttributeLabel('id_text_annex_list_index'), false),
'graphAnnexListIndex' => FileIndex::getInstance($structure->id_graph_annex_list_index, $structure->getAttributeLabel('id_graph_annex_list_index'), false),
'glossaryIndex' => FileIndex::getInstance($structure->id_glossary_index, $structure->getAttributeLabel('id_glossary_index'), false),
'reportIntroductionIndex' => FileIndex::getInstance($structure->id_report_introduction_index, $structure->getAttributeLabel('id_report_introduction_index')),
'reportMainPartIndex' => FileIndex::getInstance($structure->id_report_main_part_index, $structure->getAttributeLabel('id_report_main_part_index')),
'reportConclusionIndex' => FileIndex::getInstance($structure->id_report_conclusion_index, $structure->getAttributeLabel('id_report_conclusion_index')),
'bibliographyIndex' => FileIndex::getInstance($structure->id_bibliography_index, $structure->getAttributeLabel('id_bibliography_index')),
'metrologicalExpertiseIndex' => FileIndex::getInstance($structure->id_metrologicalexpertise_index, $structure->getAttributeLabel('id_metrologicalexpertise_index')),
'patentResearchIndex' => FileIndex::getInstance($structure->id_patent_research_index, $structure->getAttributeLabel('id_patent_research_index')),
'costStatementIndex' => FileIndex::getInstance($structure->id_cost_statement_index, $structure->getAttributeLabel('id_cost_statement_index')),
];
}
And tht's how the data is saved:
private function saveData($report, $reestrData, $structure, $elements) {
$reestrData->save(false);
$report->save(false);
foreach ($elements as $element) {
$element->save(false);
}
$structure->id_title_index = $elements['titleIndex']->id_file_index;
$structure->id_abstract_index = $elements['abstractIndex']->id_file_index;
$structure->id_technical_specification_index = $elements['technicalSpecificationIndex']->id_file_index;
$structure->id_contents_index = $elements['contentsIndex']->id_file_index;
$structure->id_image_list_index = $elements['imageListIndex']->id_file_index;
$structure->id_table_list_index = $elements['tableListIndex']->id_file_index;
$structure->id_text_annex_list_index = $elements['textAnnexListIndex']->id_file_index;
$structure->id_graph_annex_list_index = $elements['graphAnnexListIndex']->id_file_index;
$structure->id_glossary_index = $elements['glossaryIndex']->id_file_index;
$structure->id_report_introduction_index = $elements['reportIntroductionIndex']->id_file_index;
$structure->id_report_main_part_index = $elements['reportMainPartIndex']->id_file_index;
$structure->id_report_conclusion_index = $elements['reportConclusionIndex']->id_file_index;
$structure->id_bibliography_index = $elements['bibliographyIndex']->id_file_index;
$structure->id_metrologicalexpertise_index = $elements['metrologicalExpertiseIndex']->id_file_index;
$structure->id_patent_research_index = $elements['patentResearchIndex']->id_file_index;
$structure->id_cost_statement_index = $elements['costStatementIndex']->id_file_index;
$structure->save(false);
}

Answer 1

I eventually decided not to use validation for the relation at all and simply check reviews count in the controller:
if (count($structure->reviews) === 0) {
$ok = false;
Yii::$app->session->setFlash('danger', 'You should add at least one review!');
}

Answer 2

I think it's better to check it in beforeDelete method.
you can add this method to your model, and check, if it's the only review, then returns false.
public function beforeDelete()
{
if (!parent::beforeDelete()) {
return false;
}
if(self::find()->count() >1)
return true;
else
return false;
}