Running subquery in zend framework 2 with if condition - zend-framework2

Question

SELECT
t1.post_id, t1.user_id, t1.total_likes, t1.total_comments,
t2.name,
if(t3.user_id, 1, 0) as user_like
FROM `game_posts` as t1
left join users as t2 ON t1.user_id=t2.user_id
left join(
select post_id, user_id from post_likes where user_id=1
)t3
on t1.post_id=t3.post_id
where t1.game_id=1
order by t1.post_id desc
I want to execute this query in zend framework 2, here is my code but i am enable to implement the second join having subquery in it.
$adapter = $this->tableGateway->getAdapter();
$sql = new Sql($adapter);
$select = $sql->select();
// MAIN POST TABLE
$select->from(array('t1' => 'game_posts'));
// GET POST USER
$select->join(
array('t2' => 'users'),
new Expression('t1.user_id = t2.user_id'),
array(
"user_name" => "name"
),
'LEFT'
);
$select->where(array("t1.game_id"=>$gameId));
$select->order("post_date DESC");
$statement = $sql->prepareStatementForSqlObject($select);
$results = $statement->execute();
$resultSet = new ResultSet();
$resultSet->initialize($results);
$result = $resultSet->toArray();
return $result;
Basically there are 3 tables game_posts, users and post_likes table,
i am fetching all the posts which has game_id=1 with name of the user who created the post along with the current user flag if he likes the post or not.
Please help me

Answer 1

There is your query :
$adapter = $this->tableGateway->getAdapter();
$sql = new Sql($adapter);
$select3 = $sql->select();
$select3->columns([post_id, user_id])->from(post_likes)->where(['user_id' => 1]);
$select = $sql->select();
$select->columns(['post_id', 'user_id', 'total_likes', 'total_comments', 'user_like' => new Expression('if(t3.user_id, 1, 0)')])
->from(['t1' => 'game_posts'])
->join(['t2' => 'users'], 't1.user_id=t2.user_id', ['name'], Select::JOIN_LEFT)
->join(['t3' => $select3], 't1.post_id=t3.post_id', [], Select::JOIN_LEFT)
->where(['t1.game_id' => $gameId])
->order('post_date DESC');