Condition To Related

Yii 1.1 General Discussion
1

I have a Model1 that hasOne Model2, but not each Model1 hasOne Model2

And I am trying to get all Model1 that has Model2.field == 1 OR does not have Model2

in beforeFind




    public function beforeFind($event)

    {


            $this->getDbCriteria()->mergeWith(array(

            	 'with' => array('Model2' => array(

            	 	'on'=>'Model2.field=1'

            	 ),)

            ));




        return parent::beforeFind($event);

    }

the query is loading extremely long time without the proper result, and not diisplaing the correct Model2.field value