Odtnhj

I have a survey application that I confused on final side.
here is app models properties:

User

- Survey
 user_id

title
- Question
 title
 survey_id
 type: multiple_choice|check_boxes|short_answer
- Option
 title
 question_id

 (Till here is okay. I can create surveys these includes more nested forms) Issue is after created surveys. (users responses) 

-Response
 user_id
 survey_id
-Answer
 question_id
 response_id
 option_id

Creating survey with nested attributes is okay. Problem is at Response side. how should be my response controller and response form on Survey show.html.erb?

There is response controller nested attributes below;

 def response_params
 params.require(:response).permit(:id, :user_id, :survey_id, answers_attributes:[:question_id, :response_id, :option_id ] )
 end

I should tell that survey can includes multiple questions these with only radio_buttons (independent radio buttons are other issue)

This issue made me so tired. I'll be glad if you can help me. Thanks.
For Source code: Click for source codes

updated files:

Response model:

class Response < ApplicationRecord
 belongs_to :user
 belongs_to :survey
 has_many :answers, dependent: :destroy
 validates :survey, presence: true
 counter_culture :option
 accepts_nested_attributes_for :answers
end

Survey_controller:

def new_response
@survey = Survey.find(params[:id])
@response = @survey.responses.build

 # now, the tricky part, you have to build the Answer objects so you can use the nested form later
 @survey.questions.each do |q|
 @response.answers.build question: q
 end
 end



def create_response
 @survey = Survey.find(params[:id])
 @response = @survey.build(response_params)
 @response.user = current_user
 @response.save
end

Routes:

Rails.application.routes.draw do

 devise_for :users
 resources :surveys do 
 member do
 get :new_response
 get :create_response 
 end
 end
 root 'surveys#index'

 end

form:

- # surveys/new_response.html.haml
- # You need to define a nested route inside survey resource to create the response
= form_for @response, url: create_response_survey_path(@survey) do |f|
 - # you can iterate over all the answers already initialized
 = f.fields_for :answers do |ff|
 - # get the question from the current answer to show the title and options and a hidden_field with the question id
 - q = ff.object.question

 = q.title
 = ff.hidden_field :question_id

 - # add the radios for each options for the question
 - q.options.each do |option|
 = label_tag do
 = ff.radio_button :option_id, option.id
 = option.title

 = f.submit 'Send'

I wouldn't use the Survey's show action to show the form to create a Response, I think it's better to approach it as a new_response action to make it cleaner and leave the show action just to show the actual survey (not to respond it). Something like:

class SurveysController < ApplicationController
 def new_response
 @survey = Survey.find(params[:id])
 @response = @survey.responses.build

 # now, the tricky part, you have to build the Answer objects so you can use the nested form later
 @survey.questions.each do |q|
 @response.anwers.build question: q
 end
 end

Now, you can have a form for the response:

- # surveys/new_response.html.haml
- # You need to define a nested route inside survey resource to create the response
= form_for @response, url: create_response_survey_path(@survey) do |f|
 - # you can iterate over all the answers already initialized
 = f.fields_for :answers do |ff|
 - # get the question from the current answer to show the title and options and a hidden_field with the question id
 - q = ff.object.question

 = q.title
 = ff.hidden_field :question_id

 - # add the radios for each options for the question
 - q.options.each do |option|
 = label_tag do
 = ff.radio_button :choice_id, option.id
 = option.title

 = f.submit 'Send'

Your response_params should be something like:

def response_params
 params.require(:response).permit(answers_attributes: [:question_id, :choice_id])
end

note that I removed the :survey_id and the :user_id, you don't want a user to hack your form, change a survey_id or user_id and add responses to another survey made by another user!

and your create_response action:

def create_response
 @survey = Survey.find(params[:id])
 @response = @survey.build(response_params)
 @response.user = current_user
 @response.save
end

Hope it makes sense.