Yii2 Active Record 的生命周期

/**
 * @event Event an event that is triggered when the record is initialized via [[init()]].
 */
const EVENT_INIT = 'init';
/**
 * @event Event an event that is triggered after the record is created and populated with query result.
 */
const EVENT_AFTER_FIND = 'afterFind';
/**
 * @event ModelEvent an event that is triggered before inserting a record.
 * You may set [[ModelEvent::isValid]] to be `false` to stop the insertion.
 */
const EVENT_BEFORE_INSERT = 'beforeInsert';
/**
 * @event AfterSaveEvent an event that is triggered after a record is inserted.
 */
const EVENT_AFTER_INSERT = 'afterInsert';
/**
 * @event ModelEvent an event that is triggered before updating a record.
 * You may set [[ModelEvent::isValid]] to be `false` to stop the update.
 */
const EVENT_BEFORE_UPDATE = 'beforeUpdate';
/**
 * @event AfterSaveEvent an event that is triggered after a record is updated.
 */
const EVENT_AFTER_UPDATE = 'afterUpdate';
/**
 * @event ModelEvent an event that is triggered before deleting a record.
 * You may set [[ModelEvent::isValid]] to be `false` to stop the deletion.
 */
const EVENT_BEFORE_DELETE = 'beforeDelete';
/**
 * @event Event an event that is triggered after a record is deleted.
 */
const EVENT_AFTER_DELETE = 'afterDelete';
/**
 * @event Event an event that is triggered after a record is refreshed.
 * @since 2.0.8
 */
const EVENT_AFTER_REFRESH = 'afterRefresh';