/**
* Utility method to get an instance of a model given an identifier in the query string
* @param $modelClassName
* @param string $queryParameter
* @return \GGS\Components\Model
*/
protected static function getModelByRequest($modelClassName, $queryParameter = 'id')
{
$id = WebApplication::$request->getQueryStringParameter($queryParameter);
if (!isset($id)) {
// whoopsie, can't live without id
static::exitWithException("Invalid Request: Missing id.", 400);
}
if (!is_numeric($id) || $id < 1) {
// so far we are only using positive integer primary keys so it doesn't make sense to search for a model
// with negative key
static::exitWithException("Invalid Request: id must be positive integer", 400);
}
// convert id to a proper integer, no string values;
$id = intval($id);
// get the qualified model class name with namespace
$modelClassName = \GGS\Components\Model::getQualifiedModelClassName($modelClassName);
// get the model
$model = $modelClassName::getByPk($id);
if (!isset($model)) {
// model not found? how come? I know, a bad request.
static::exitWithException("No records found for: {$id}", 404);
}
// found it.
return $model;
}
public function validate(\GGS\Components\Model &$object, $attribute)
{
if (empty($object->{$attribute})) {
return parent::validate($object, $attribute);
}
$qualifiedModelClassName = \GGS\Components\Model::getQualifiedModelClassName($this->modelClass);
$exists = $qualifiedModelClassName::exists(array($this->attribute => $object->{$attribute}));
if (!$exists) {
$this->setError($object, $attribute, 'referenced record can not be found');
}
return $exists;
}
