Phalcon MySQL UPDATE not working - php

Question

I am trying to create RESTful API and I am trying to update my MySQL database row through Phalcon via pure queries. But I run into the issue that the query is runned Phalcon status->success() returns true but when I look into the db values are the same as before.
I tried to change from SQL queries to using model->update() but has the same issue. Both values country_id and university_id are integers.
Any clue or workaround?
My POST handling function:
$app->post("/api/user/university/{id:[0-9]+}", function($id) use ($app){
$university_id = $app->request->getPost("university_id");
$country_id = universities::findFirstById($university_id)->country_id;
$phpql = "UPDATE users
SET university_id=:university_id:,
country_id=:country_id:
WHERE
id=:user_id:";
$status = $app->modelsManager->executeQuery($phpql, array(
'user_id' => $id,
'university_id' => $university_id,
'country_id' => $country_id
));
$response = new Response();
if($status->success() == true){
$response->setStatusCode(201, "Created");
$response->setJsonContent(
array(
'status' => 0
)
);
} else {
$response->setStatusCode(409, "Conflict");
$errors = array();
foreach ($status->getMessages() as $message) {
$errors[] = $message->getMessage();
}
$response->setJsonContent(
array(
'status' => 'ERROR',
'messages' => $errors
)
);
}
return $response;
});

Answer 1

Is university_id and country_id part of PK ? If yes then phalcon don't allow to change primiary keys. If you need such behaviour remove those columns from primiary key and use uniquness validator.