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POrailscast 197 how to: function add_fields
 

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  1. POrailscast 197 how to: function add_fields
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    <p>I am following the railscast 197 but Im using rails 3.1.3,jquery and scaffold, no nifty:scaffold,everything works fine but I can't add fields, in that episode Ryan Bates give the code for jquery, but is not working for me, here is my code...thanks in advance.</p> <p>in <strong>javascript/application.js</strong></p> <pre><code>function remove_fields(link) { $(link).prev("input[type=hidden]").val("1"); $(link).closest(".fields").hide(); } function add_fields(link, association, content) { var new_id = new Date().getTime(); var regexp = new RegExp("new_" + association, "g"); $(link).parent().before(content.replace(regexp, new_id)); } </code></pre> <p><strong>helper/application_helper.rb</strong></p> <pre><code>module ApplicationHelper def link_to_remove_fields(name, f) f.hidden_field(:_destroy) + link_to_function(name, "remove_fields(this)") end def link_to_add_fields(name, f, association) new_object = f.object.class.reflect_on_association(association).klass.new fields = f.fields_for(association, new_object, :child_index =&gt; "new_#{association}") do |builder| render(association.to_s.singularize + "_fields", :f =&gt; builder) end link_to_function(name, h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")")) end end </code></pre> <p><strong>_questions_fields.html.rb</strong></p> <pre><code>&lt;div class="fields"&gt; &lt;p&gt; &lt;%= f.label :content, "Pregunta" %&gt; &lt;%= link_to_remove_fields "remover", f%&gt;&lt;br /&gt; &lt;%= f.text_area :content, :rows =&gt; 3 %&gt;&lt;br /&gt; &lt;/p&gt; &lt;p&gt; &lt;% f.fields_for :answers do |builder| %&gt; &lt;%= render 'answer_fields', :f =&gt; builder %&gt; &lt;% end %&gt; &lt;/p&gt; &lt;p&gt;&lt;%= link_to_add_fields "Agregar respuesta", f, :answers %&gt;&lt;/p&gt; &lt;/div&gt; </code></pre> <p><strong>_form.html.rb</strong></p> <pre><code>&lt;%= form_for @asurvey do |f| %&gt; &lt;%= f.label :name, "Nombre de encuesta" %&gt;&lt;br /&gt; &lt;%= f.text_field :name %&gt; &lt;/p&gt; &lt;%= f.fields_for :questions do |builder| %&gt; &lt;%= render 'question_fields', :f =&gt; builder %&gt; &lt;% end %&gt; &lt;p&gt;&lt;%= link_to_add_fields "Agregar pregunta", f, :questions %&gt; &lt;p&gt;&lt;%= f.submit "Crear" %&gt;&lt;/p&gt; &lt;% end %&gt; </code></pre>
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