How to create objects of different classes depending on an attribute in Yii2?

Question

Yii

There is a basic model, there are its heirs. It is necessary that, depending on the attribute, for example type, a new model of the {Type}{BaseModel} class is created, if type is specified, or of the {BaseModel} class, if type is not specified. How can this be implemented?

Answer 1

single table inheritance

Answer 2

To do this, you need to override the ActiveRecord instantiate static method, which is responsible for creating the model object

static function instantiate($row)
    {
        if ($row['type'] == self::TYPE_ARTICE)
            return new Article();

        return new static();
    }

The logic of the method is taken from the head, well, the essence must be understood