Sql 如何在执行复杂联接时对其他活动记录模型隐藏列名的详细信息

以下是我在目标类中编写的查找器方法：

像这样让目标类知道ResourceObjectiveLink的resource_id列名感觉很混乱。我尝试像这样在ResourceObjectiveLink类上创建一个作用域，但当我将其链接到Objective中的以下\u-objectives\u-for\u-user方法中时，它找不到它：

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隐藏此信息的正确方法是什么？

为什么不能只使用ActiveRecord关系？不仅仅是

User has_many :resource_objective_links
User has_many :objectives, through: :resource_objective_link

Objective has_many :resource_objective_links
Objective has_many :users, through: :resource_objective_links

ResourceObjectiveLink belongs_to :user
ResourceObjectiveLink belongs_to :objective

# And now you can use:
# user = User.find(some_user_id)
# user.objectives 
# => will perform database join and return all Objectives for ResourceObjectiveLink with correct user.id

scope :for_resource, ->(resource) { where(resource_id: resource.id) }

User has_many :resource_objective_links
User has_many :objectives, through: :resource_objective_link

Objective has_many :resource_objective_links
Objective has_many :users, through: :resource_objective_links

ResourceObjectiveLink belongs_to :user
ResourceObjectiveLink belongs_to :objective

# And now you can use:
# user = User.find(some_user_id)
# user.objectives 
# => will perform database join and return all Objectives for ResourceObjectiveLink with correct user.id