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PORails: radio button selection for nested objects
 

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    <p>I'm stuck with this simple selection task. I have this models:</p> <pre><code># id :integer(4) not null, primary key # category :string(255) # content :text class Question &lt; ActiveRecord::Base has_many :choices, :dependent =&gt; :destroy accepts_nested_attributes_for :choices end # id :integer(4) not null, primary key # content :text # correct :boolean(1) # question_id :integer(4) class Choice &lt; ActiveRecord::Base belongs_to :question end </code></pre> <p>When I create a new question, I want to specify in a nested form not only the <code>content</code> of the <code>Question</code>, but even the <code>content</code> of 3 <code>Answer</code> objects, and select with a radio button which one is the <code>correct</code> answer. In the <code>new</code> action of the controller, I have this:</p> <pre><code>def new @title = "New Question" @question = Question.new 3.times { @question.choices.build } respond_to do |format| format.html # new.html.erb format.xml { render :xml =&gt; @question } end end </code></pre> <p>This is the form code:</p> <pre><code>&lt;%= simple_form_for @question do |question_form| %&gt; &lt;%= question_form.error_notification %&gt; &lt;div class="inputs"&gt; &lt;%= question_form.input :content, :label =&gt; 'Question' %&gt; &lt;%= question_form.input :category, :collection =&gt; get_categories, :include_blank =&gt; false %&gt; &lt;% @question.choices.each do |choice| %&gt; &lt;%= question_form.fields_for :choices, choice do |choice_fields| %&gt; &lt;%= choice_fields.input :content, :label =&gt; 'Choice' %&gt; &lt;%= choice_fields.radio_button :correct, true %&gt; &lt;%= choice_fields.label :correct, 'Correct Answer' %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;/div&gt; &lt;div class="actions"&gt; &lt;%= question_form.button :submit %&gt; &lt;/div&gt; &lt;% end %&gt; </code></pre> <p>The problem is that this code produce three radio buttons with different names: you can select more than one correct answer, and this is not the correct behaviour. The names of the three radio buttons are <code>question[choices_attributes][0][correct]</code>, <code>question[choices_attributes][1][correct]</code> and <code>question[choices_attributes][2][correct]</code>.</p> <p>The question is: how can I create three radio buttons with the same name, in order to select one and only one correct answer? How can I create a correct <code>params</code> array, in order to save them in the <code>create</code> action in this way:</p> <pre><code>def create @question = Question.new(params[:question]) # render or redirect stuff.... end </code></pre> <p>Thank you very much!</p>
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    1. COi have the same problem, why nobody helped answer? :(
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    2. CODid you ever find an answer for this? Tearing my hair out over it!
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      1. UShenryeverett
 

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