Question

我怎样才能达到这样的目标？
结构是=＆gt;测试有很多问题，问题有很多答案。

我在控制器中有questions = @test.questions.build和questions.answers.build。

form_for @test do |f|
  f.fields_for :questions do |question_f|
    question_f.fields_for :answers do |answer_f|
      # answer form here

直到fields_for：answers。

我错过了什么？谢谢！

Answer 1

如果您想使用嵌套表单，还应将accepts_nested_attributes_for放入Test and Question模型中：

class Test < ActiveRecord::Base
  attr_accessible :questions_attributes
  has_many :questions, dependent: :destroy
  accepts_nested_attributes_for :questions
end

class Question < ActiveRecord::Base
  attr_accessible :answers_attributes
  has_many :answers, dependent: :destroy
  accepts_nested_attributes_for :answers
end

试试这个：

form_for ([@test, @question]) do |f|

并在控制器的新操作中：

@test = Test.new
@question = Question.new
@test.questions.build
@question.answers.build

Rails fields_for inside fields_for

1 个答案: