Change html form id generated by form_for rails 3.1

Question

I have this form_for:

<%= form_for [post, Comment.new,], :remote => true do |f| %>
<%= f.text_area :content, :cols =>10, :rows => 1%>
<%          


        

Answer 1

I think the :namespace option is what you're looking for.

It appends the name to the form's id as well as all input and label fields.

e.g

<%= form_for [post, Comment.new,], namespace: 'NAMESPACE', :remote => true do |f| %>
    <%= f.text_area :content, :cols =>10, :rows => 1%>
<% end %>

Would generate:

Form id = NAMESPACE_new_comment

Textarea id = NAMESPACE_comment_content

From the docs:

:namespace - A namespace for your form to ensure uniqueness of id attributes on form elements. The namespace attribute will be prefixed with underscore on the generated HTML id