I'm new to cakephp, I'm implementing a web service for update password where user will provide oldpassword, newpassword, username parametrs, I have to check in db if that username has the old password, then update db with newpassword.

what I have done so far is, I got the parametrs, I can fetch the data with username like this

```
 $username = $this->request->query['username'];
 $oldpassword = $this->request->query['oldpassword'];
 $dataexist = $this->User->find('first', array('fields' => array('User.id','User.username','User.password'), 'conditions' => array('User.username' => $username)));

```

Now its returning data, but if I use password field like this

```
$dataexist = $this->User->find('first', array('fields' => array('User.id','User.username','User.password'), 'conditions' => array('User.username' => $username,'User.password' => $oldpassword)));

```

Its returning empty result, even I pass correct old password..!
where I'm doing mistake, any help is much appreciated...