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POAdd one nested record from several records at once in Rails 3
 

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  1. POAdd one nested record from several records at once in Rails 3
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    <p>I've been stuck for a few days on this and although I managed to find a few relevant answers, nothing seems to cover the two features I need altogether.</p> <p>Basically I've got a "Question", and "Answer" model. I want to show as many answer fields as questions are there, and create them using my custom controller. I also want to assign either session id if not signed in, or user Id to the answer (so then I can work out who answered once they register). I managed to show the fields, but now they won't save, only thing I get is an "internal error" message on the view and an exception on the console:</p> <pre><code>!! Unexpected error while processing request: expected Array (got Rack::Utils::KeySpaceConstrainedParams) for param `question' </code></pre> <p>This are what my models / controller look like:</p> <p><strong>step1_controller.rb</strong></p> <pre><code>class Configurator::Step1Controller &lt; ApplicationController before_filter :authenticate_user! def new @questions = Question.includes(:choices).all() end def create Question.update_attributes(params[:question].keys, params[:question].values) flash[:notice] = 'Reports were successfully updated.' redirect_to root_path end end </code></pre> <p><strong>models/answer.rb</strong></p> <pre><code>class Answer &lt; ActiveRecord::Base attr_accessible :weight, :user_id, :question_id belongs_to :user belongs_to :question end </code></pre> <p><strong>models/question.rb</strong></p> <pre><code>class Question &lt; ActiveRecord::Base attr_accessible :created_at, :desc, :updated_at, :title, :created_by_id, :updated_by_id, :tag_id, :answers_attributes belongs_to :created_by, :class_name =&gt; 'User' belongs_to :updated_by, :class_name =&gt; 'User' belongs_to :tag has_many :choices has_many :answers has_many :user, :through =&gt; :answers accepts_nested_attributes_for :answers end </code></pre> <p><strong>routes.rb</strong></p> <p>namespace :configurator do get "step1", :to => 'step1#new', :as => :step1 post "step1" => "step1#create", :as => :step1 end</p> <p><strong>view</strong></p> <pre><code>&lt;%= form_for :question, :url =&gt; configurator_step1_path do -%&gt; &lt;% for question in @questions %&gt; &lt;%= fields_for "question[]", question do |question_fields| %&gt; &lt;%= question_fields.hidden_field :id %&gt; &lt;%= question_fields.label :title, question.title %&gt; &lt;%= question_fields.fields_for :answers, [Answer.new] do |li_fields| %&gt; &lt;%= li_fields.text_field :weight %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;%= submit_tag "Create line items" %&gt; &lt;% end %&gt; &lt;% if false %&gt; &lt;%= f.fields_for :answers, [Answer.new]*5 do |li_fields| %&gt; &lt;%= li_fields.label :weight %&gt; &lt;%= li_fields.text_field :weight %&gt; &lt;% end %&gt; &lt;br&gt; &lt;% end %&gt; </code></pre>
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