學說多行GROUPBY算

Question

我有以下查詢教義：

生成的SQL是：

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 

而這個查詢在MySQL的結果是這樣的：

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

使用Doctrine，有一種方法可以獲得「u__0」列值嗎？

我嘗試：

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

但結果僅具有2行（未3）。

如何獲得「u__0」列值？ （0,2,1）使用Doctrine？

Answer 1

我改變SQL查詢：

$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"); 

和它的作品;）

Answer 2

你必須循環每個結果和檢索quantity值：

$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']); 
}