/**
  * @return \yii\db\ActiveQuery
  */
 public function getLogTopics()
 {
     return $this->hasMany(YBoardLogTopic::className(), ['member_id' => 'id']);
 }
 /**
  * @return \yii\db\ActiveQuery
  */
 public function getLogTopic()
 {
     return $this->hasOne(YBoardLogTopic::className(), ['topic_id' => 'id']);
 }