/**
* check if a model field value is unique
* @param \DB\Cortex $model
* @param mixed $val
* @param string $field
* @param string $context
* @return bool
*/
function unique($model, $val, $field, $context = null)
{
$valid = true;
if (empty($val)) {
return $valid;
}
if (!$this->f3->exists($context . '.unique', $errText)) {
$errText = 'This ' . $field . ' is already taken';
}
$filter = $model->dry() ? array($field . ' = ?', $val) : array($field . ' = ? and _id != ?', $val, $model->_id);
if ($model->findone($filter)) {
$this->f3->error(400, $errText);
\Flash::instance()->setKey($context, 'has-error');
$valid = false;
}
return $valid;
}
