Ruby on rails Rails中的逆_属于关联吗？

首先，我知道“逆”是如何在有很多关联的情况下工作的

# relationship without inverse_of
user has_many :orders

# this will generate two database queries
user.orders.first.user
Order Load (0.1ms)  SELECT  `orders`.* FROM `orders` WHERE `orders`.`user_id` = 2  ORDER BY `orders`.`id` ASC LIMIT 1
User Load (0.1ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 2 LIMIT 1

这里，user和user.order.first.user是两个不同的对象

与之相反的是

# relationship with inverse_of
user has_many :orders, inverse_of: :user

# this will generate just one database query
user.orders.first.user
Order Load (0.1ms)  SELECT  `orders`.* FROM `orders` WHERE `orders`.`user_id` = 2  ORDER BY `orders`.`id` ASC LIMIT 1

现在，user和user.order.first.user是同一个对象

但是，在这种情况下，什么样的反义词属于联想呢

# relationship with inverse_of in belongs_to association
order belongs_to :user, inverse_of: :orders

order.user.orders
# will generate two database queries
User Load (0.5ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 2 LIMIT 1
Order Load (0.1ms)  SELECT `orders`.* FROM `orders` WHERE `orders`.`user_id` = 2

在这个关系中，如果我使用逆的或不使用逆的，没有区别。也许我用错了？in的逆u属于联想的意义是什么