ruby-on-rails - 如何创建“通过”关联？

Organization和Link通过Node关联。
Organization

has_many :nodes
has_many :links, through: :nodes, source: :where_first_links

Node

belongs_to :organization
has_many :where_first_links, class_name:  "Link",
                             foreign_key: "first_node_id"
has_many :where_second_links, class_name:  "Link",
                              foreign_key: "second_node_id"

Link

belongs_to :first_node,  class_name: "Node"
belongs_to :second_node, class_name: "Node"

问题：如何将Link关联回Organization？我试过下面这一行，但似乎不起作用（ArgumentError: Unknown key: :through.）：

belongs_to :organization,
           through: :first_node,
           source: :where_first_links,
           inverse_of: :links

最佳答案

通过密钥不支持属于关联
你应该用has_one联想

has_one :first_node_organization,
        through: :first_node,
        class_name: 'Organization',
        source: :organization

关于ruby-on-rails - 如何创建“通过”关联？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/35083313/