Phalcon: specific column on joined PHQL - phalcon

Question

The below PHQL generates a complex resultset like it should:
$phql = "SELECT User.*, ProductUser.* "
. "FROM ProductUser "
. "INNER JOIN User "
. "WHERE ProductUser.product_id = 5";
Replacing ProductUser.* with an existing column like ProductUser.id causes an error:
MESSAGE: The index does not exist in the row
FILE: phalcon/mvc/model/row.zep
LINE: 67
This is version 2.0.6. Is this a bug or am I making a mistake somewhere? According to the documentation it should be fine.

Answer 1

It was my mistake (expecting the row to always be an object).
I hope this helps someone because looping complex resultsets is not in the documentation.
$result = $this->modelsManager->createQuery($phql)->execute();
if ($result instanceof \Phalcon\Mvc\Model\Resultset\Complex) {
foreach ($result as $rows) {
foreach ($rows as $row) {
if (is_object($row)) {
$modelData = $row->toArray());
// this is what I needed
} else {
$id = $row;
}
}
}
}

Answer 2

First of all you're missing the ON clause in your query.
Anyways, it's easier and more error prone to use Phalcon's query builder for querying:
<?php
// modelManager is avaiable in the default DI
$queryBuilder = $this->modelsManager->createBuilder();
$queryBuilder->from(["product" => 'Path\To\ProductUser']);
// Inner join params are: the model class path, the condition for the 'ON' clause, and optionally an alias for the table
$queryBuilder->innerJoin('Path\To\User', "product.user_id = user.id", "user");
$queryBuilder->columns([
"product.*",
"user.*"
]);
$queryBuilder->where("product.id = 5");
// You can use this line to debug what was generated
// $generatedQuery = $queryBuilder->getPhql();
// var_dump($generatedQuery);
// Finish the query building
$query = $queryBuilder->getQuery();
// Execute it and get the results
$result = $query->execute();
// Now use var_dump to see how the result was fetched
var_dump($result);
exit;