How To Deal With Data Not In...

I am struggling with trying to deal with sets of data and excluding sets that already exist.

I am pretty good with Oracle SQL but not sure how to do this in Yii.

Give 2 tables: Website, User_Website

Website

(id

,website

)

User_Website

(id

,website_id

,user_id

)

I want to insert into User_Website all the id’s from the Website table that do not already exist in the User_Website

table.

Seems simple enough…in SQL it would be no problem.

Can I create a scope to make this easier?

My code in my controller is




public function createUserSite($id)

	{	// $id is from user 


                $user = User::model()->findByPK($id);

		// set criteria for query on Website

		$criteria = array(					

			'condition'=>'quality_id<='.$user->quality_id , 

			'order'=>'id',

		);

				

		//' and website.id not in (select website_id from user_website where user_id = $id,

		// with('usersites')->	


		[b]// get the websites that are not in sitereview table for that partner[/b]

               [b] $sites = Website::model()->findAll($criteria);[/b]


		foreach ($sites as $sid) {

		// for each site insert a new record.

		$reviewsite = new sitereview;

		$reviewsite-> user_id=$id;

		$reviewsite-> website_id=$sid->id;

		$reviewsite->save();

		}

I just got it to work using the subquery…not sure if there is a better more "Yii" way…

Thanks!