Yii2 show error when exception occurs - exception

Question

I have this code in my controller:
...
if (Model::validateMultiple($ttepk)) {
$transaction = \Yii::$app->db->beginTransaction();
try {
foreach ($ttepk as $ttep) {
$ttep->save(false);
if (!$ttep->assignPs()) {
throw new UserException('assignPs failed');
}
}
$transaction->commit();
return $this->redirect(['index']);
} catch (Exception $ex) {
$transaction->rollBack();
throw $ex;
}
}
...
in model:
...
public function assignPs() {
foreach (...) {
$ttepetk[...] = new Ttepet;
$ttepetk[...]->ttepId = $this->id;
... // set other attributes
}
}
if (Model::validateMultiple($ttepetk)) {
foreach ($ttepetk as $ttepet) {
$ttepet->save(false);
}
return true;
} else {
return false;
}
}
...
Everything is working fine (no inserts are happening if any of the models fail validation), except that I would like to see the exact error, exactly by which Ttep (each Ttep is a model) and by which Ttepet (Ttep:Ttepet = 1:N) has the error happened, and what was that. Now I see the Exeption page only, and I don't know how to make the errors visible. Please point me to the right direction. Thanks!

Answer 1

You could iterate on each single model validating one by one and getting the errors when occurs ...
if (Model::validateMultiple($ttepetk)) {
foreach ($ttepetk as $ttepet) {
$ttepet->save(false);
}
return true;
} else {
foreach($ttepetk as $model){
if ($model->validate()) {
// all inputs are valid
} else {
// validation failed: $errors is an array containing error messages
$errors = $model->errors;
}
}
return $errors;
}
you can get the errors this way
$myErrorResult = $ttep->assignPs();
if (!$myErrorResult) {
......