教义多行组按计数

Question

I have the following Query with doctrine:

$q = Doctrine_Query::create()
    ->select("q.id, q.user_id, count(ua.id) as quantity")
    ->from("question q")
    ->leftJoin("q.Answers a")
    ->leftJoin("a.UserAnswers ua")
    ->groupBy("ua.user_id");

Generated SQL is:

SELECT q.id AS q__id, q.user_id AS q__user_id, COUNT(u.id) AS u__0 FROM question q LEFT JOIN answer a ON q.id = a.question_id LEFT JOIN user_answer u ON a.id = u.answer_id GROUP BY u.user_id

And the result of this query in MySQL is like:

+-------+------------+------+
+ q__id + q__user_id + u__0 +
+-------+------------+------+
+     1 +          1 +    0 +
+-------+------------+------+
+    26 +          6 +    2 +
+-------+------------+------+
+    26 +          6 +    1 +
+-------+------------+------+

Using Doctrine, there is a way to obtain "u__0" column values?

I tried:

$questions = $q->execute();
echo (count($questions));

but the result has only 2 rows (not 3).

How can I get "u__0" column values? (0, 2, 1) using Doctrine?

Answer 1

You have to loop for each result and retrieve the quantity value:

$q = Doctrine_Query::create()
    ->select("q.id as id, q.user_id as question_user_id, ua.user_id as answer_user_id, count(ua.id) as quantity")
    ->from("question q")
    ->leftJoin("q.Answers a")
    ->leftJoin("a.UserAnswers ua")
    ->groupBy("answer_user_id");

$results = $q->execute(array(), Doctrine_Core::HYDRATE_ARRAY);
foreach ($results as $result)
{
    var_dump($result['quantity']);
}

Answer 2

I changed SQL query to:

$q = Doctrine_Query::create()
    ->select("q.id, q.user_id, a.id, count(ua.id) as quantity")
    ->from("Answer a")
    ->leftJoin("a.Question q")
    ->leftJoin("a.UserAnswers ua")
    ->groupBy("ua.user_id");

And it works ;)