hasOne()
*
* public function getCountry()
* {
* return $this->hasOne(Country::className(), ['id' => 'country_id']);
* }
*
hasMany()
*
* public function getOrders()
* {
* return $this->hasMany(Order::className(), ['customer_id' => 'id']);
* }
*
Notice the opposite order? The docs explain why but it’s still confusing.
