Yii CDbCriteria query matching mutiple rows in one table - mysql

Question

I'm trying to figure out how to build a query using Yii's CDbCriteria that would be equivalent to the following:
SELECT
*
FROM
user u
JOIN (
SELECT *
FROM skill_assessment s
WHERE s.skill = 'HTML'
AND s.score >= 80
) b ON
(u.id = b.userId)
JOIN (
SELECT *
FROM skill_assessment s
WHERE s.skill = 'CSS3'
AND s.score >= 80
) c ON
(u.id = c.userId);
etc...
Here's what I have so far, that isn't working:
$criteria = new CDbCriteria();
$criteria->alias = "u";
$criteria->select = "*";
$criteria->join = "JOIN skill_assessment s ON (u.id=s.userId)";
for($i = 0; $i < count($skill_filters); $i++) {
$criteria->addCondition("s.skill='".$skill_filters[$i]->skill."' AND s.score >= ".$skill_filters[$i]->level);
}
$users = UserModel::model()->findAll($criteria);
Any help would be greatly appreciated.
Thanks in advance.
EDIT:
I was able to build out the sql query as a string and use findAllBySql, which returned the correct UserModels that matched my search criteria, the problem is that I haven't been able to get it to return the related SkillAssessmentModels. They don't come back either with the initial query, like this:
$users = UserModel::model()->with('skill_assessments')->findAllBySql($sql);
nor if I get the results like this:
$users = UserModel::model->findAllBySql($sql);
foreach($users as $user)
{
$user->skill_assessments = $user->getRelated('skill_assessments');
}
Any thoughts on how I can get those related models?
The strange thing is that elsewhere in my application, I CAN get the related models if I do this:
$user = UserModel::model->findByPk($id);
$user->skill_assessments->getRelated('skill_assessments');

Answer 1

Second param for addCondition is by default 'AND'. Is this what you are looking for? May be you should define 'OR' for $operator and add braces around condition.
But in your case addCondition will by applied to the user table, not to the JOIN.
I think that this should work for you:
$criteria = new CDbCriteria();
$criteria->alias = "u";
$criteria->together= "skill_assessment";
$where = array();
for($i = 0; $i < count($skill_filters); $i++) {
$where[] = "(s.skill='".$skill_filters[$i]->skill."' AND s.score >= ".$skill_filters[$i]->level . ')';
}
$criteria->join = 'JOIN skill_assessment s ON (u.id=s.userId' . ( $where ? ( ' AND (' . join( ' OR ', $where ) . ')' ) : '') . ')';
$users = UserModel::model()->findAll($criteria);
Fetch _skill_assessment_ like this:
foreach( $users->skill_assessment as $skill_assessment )
{
echo $skill_assessment->userId;
}

Answer 2

At this level keep it simple:
$sql="select * from mytable where id = :id";
$cmd = Yii::app()->db->createCommand($sql)->bindParam("id", $res_id);
$cmd->execute();

Answer 3

Thanks a lot to Boris Belenski!
What you suggested wasn't quite what I needed, but it did get me to what I needed. Here is what I ended up with that works:
$str = "abcdefghijklmnopqrstuvwxyz";
$idxs = str_split($str);
$criteria = new CDbCriteria();
$criteria->alias = "u";
$joins = array();
for($i = 0; $i < count($skill_filters); $i++)
{
$joins[] = " JOIN (SELECT * FROM skill_assessment s WHERE s.skill = '" . $skill_filters[$i]->skill ."' AND s.score >= " . $skill_filters[$i]->level . ") " . $idxs[$i] . " ON (u.id = " . $idxs[$i] . ".userId) ";
}
$criteria->join = join(' ', $joins);
$users = UserModel::model()->findAll($criteria);
foreach($users as $user)
{
$user->skill_assessments = $user->getRelated('skill_assessments');
}
The really key part is that $joins array.
This will allow you to get all the users that match ALL the criteria for row matches in the skill_assessments table.
Also, I could probably lazily load the skill assessments in the View in a normal view, but I need to get all the skill_assessments for each user now in order to pass them back in an ajax response with the user.