Rails fields_for inside fields_for

How can I achieve something like this?
The structure is => a test has many questions, and a question has many answers.

我怎样才能实现这样的目标?结构是=>测试有很多问题,一个问题有很多答案。

I have questions = @test.questions.build and questions.answers.build in the controller.

我在控制器中有问题= @ 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

It works untill the fields_for :answers.

它的工作原理直到fields_for:answers。

What am I missing? Thanks!

我错过了什么?谢谢!

1 个解决方案

#1

You should also put accepts_nested_attributes_for in your Test and Question model if you want use nested form:

如果要使用嵌套形式,还应在您的测试和问题模型中放置accepts_nested_attributes_for:

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

Try this:

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

and in your new action in controller:

并在控制器中的新操作中:

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

#1