has_many通过不能修改关联

Question

我有三个模特:艾蒙，贝拉和林戈

class Almon < ActiveRecord::Base

  belongs_to :bela, dependent: :destroy
  has_many :lingos, through: :bela, dependent: :delete_all

  accepts_nested_attributes_for :bela
  accepts_nested_attributes_for :lingos, :allow_destroy => true
end

我试图在Almon中提交一个嵌套的表单，

无法修改关联'Almon#Lingos‘，因为源反射类'Lingo’通过:has_many与'Bela‘相关联。

有人能告诉我我做错了什么吗？

Answer 1

您需要使用has_many而不是belongs_to，如下所示：

has_many :belaes, dependent: :destroy
has_many :lingoes, through: :belaes, dependent: :delete_all