Calculated attribute in AR, how to reference DB atributes whitin the object?

Yii 1.1 General Discussion
1

Hi! How can I use a calculated attribute in AR, the sum of two database fields, for instance?

I tried to add a method in the model class like this:


	

abstract class BaseClase extends ActiveRecord {

public static function getTotal() {

	return $this->minor + $this->major;	

}

My test code is:




$clase = Clase::model()->findByPk(1);			

echo $clase->othervalue; //This attribute reference works fine

echo $clase->total;  //This raises an error.

I get this error: Using $this when not in object context

What I’m doing wrong? ‘minor’, ‘major’, and ‘othervalue’ are fields in the database and attributes of the AR.

2

Your function should not be “static”. Just remove that word from getTotal() and you’re good.

3

Oh, i’m a dork! I copied it from another method and never realizes about the static modificator. Thank you Karl!