Question

我有一个调查控制器，它会将questions，answers和user收集到UserSurveyAnswer模式中。

我正在尝试扩展它以允许文本答案（如果需要）。目前，您可以勾选任意数量的答案，但我很难将其扩展为允许文本答案（:text_answer）

目前，我正在从我的控制器指向此功能

user_survey_answer.rb

 def self.update_answer(user_param, user_id)
    begin
      user_param[:survey].each do |survey|
        survey_id = survey[:id]
        survey[:question].each do |qs|
          question_id = qs[:id]
          answer_ids = qs[:answer_ids]
          answer_ids.collect{|answer_id| self.create({:user_id => user_id, :survey_id =>survey_id, :question_id => question_id, :answer_id => answer_id}) }

              #new bit, which doesn't work
            qs[:answer].each do |text_answer|
              self.create({:user_id => user_id, :survey_id =>survey_id, :question_id => question_id, :answer_id => text_answer[:id], :text_answer => text_answer[:text_answer]})
            end
              #end new bit

        end
      end
      return true
    rescue Exception => exc
      return false
    end
  end

以下是服务器如何显示通过的信息。

"user"=>{"survey"=>[
    {"id"=>"1", "question"=>[
        {"id"=>"1", "answer_ids"=>["1"]}
    ]
    },
    {"id"=>"2", "question"=>[
        {"id"=>"2", "answer"=>[
            {"id"=>"2", "text_answer"=>"dwqdw"}
        ]
        }
    ]}
]}

关于如何将上述信息（特别是第二部分）保存到我的UserSurveyAnswer模态中的任何想法？

编辑：完整的UserSurveyAnswer模式

class UserSurveyAnswer < ActiveRecord::Base

  validates_uniqueness_of :user_id, :scope => [:survey_id, :question_id, :answer_id]

  belongs_to :user
  belongs_to :survey
  belongs_to :question
  belongs_to :answer

  def self.update_answer(user_param, user_id)
    begin
      user_param[:survey].each do |survey|
        survey_id = survey[:id]
        survey[:question].each do |qs|
          question_id = qs[:id]
          answer_ids = qs[:answer_ids]
          answer_ids.collect{|answer_id| self.create({:user_id => user_id, :survey_id =>survey_id, :question_id => question_id, :answer_id => answer_id}) }

          text_answer = qs[:answer]
          UserSurveyAnswer.create(user_id: user_id, survey_id: survey_id, question_id: question_id, answer_id: text_answer[:id], text_answer: text_answer[:text_answer])


        end
      end
      return true
    rescue Exception => exc
      return false
    end
  end


end

Answer 1

首先，我会使用嵌套属性，因此所有这些都会自动保存，而不是您手动完成所有这些操作。但是，我不确定行self.create是否有意义。我以前从未真正从模型中创建过对象。如果我理解你的关联，你应该把：

UserSurveyAnswer.create(user_id: user_id, survey_id: survey_id, question_id: question_id, answer_id: text_answer[:id], text_answer: text_answer[:text_answer])

编辑：所以我也要将它之前的行更改为：

answer_ids.collect{|answer_id| UserSurveyAnswer.create(user_id: user_id, survey_id: survey_id, question_id: question_id, answer_id: answer_id) }

Answer 2

我把它从模态中删除并意识到当存在文本问题时，answer_ids不会，因此该函数在第一个保存行上失败：

answer_ids.collect{|answer_id| self.create({:user_id => user_id, :survey_id =>survey_id, :question_id => question_id, :answer_id => answer_id}) }

一旦我为此进行了异常处理（以及第二次保存的后续处理），一切都有效！

感谢@ryan k的帮助

在轨道中自定义保存参数

2 个答案: