Yii2 before saving check if attributes are changed

Question

I want to check if some attributes in my model are changed beforeSave()to match the data stored in the database.

Is there any best practice to check if the model has changed?

My goal is si to make a story. If any attribute changes, I save a copy in the table model_history.

Answer 1

You can do this with afterSave().

public function afterSave($insert, $changedAttributes) {
    parent::afterSave($insert, $changedAttributes);
    if(!$insert) {
        // your code here like $changedAttributes['myField'];
    }
}

$changedAttributes saves attribute values ​​that have been changed.

Answer 2

You need to check for dirty attributes

yii\db\ActiveRecord::getDirtyAttributes(), , .

http://www.yiiframework.com/doc-2.0/guide-db-active-record.html#dirty-attributes