/**
  * @return \yii\db\ActiveQuery
  */
 public function getClient()
 {
     return $this->hasOne(Client::className(), ['client_id' => 'client_id']);
 }
 /**
  * @return \yii\db\ActiveQuery
  */
 public function getClients()
 {
     return $this->hasMany(Client::className(), ['client_id' => 'client_id'])->viaTable('route-client', ['route_id' => 'route_id']);
 }