clm-a

Array.prototype.shuffle = function( b ) {
 var i = this.length, j, t;
 while( i ) {
  j = Math.floor( ( i-- ) * Math.random() );
  t = b && typeof this[i].shuffle!=='undefined' ? this[i].shuffle() : this[i];
  this[i] = this[j];
  this[j] = t;
 }
 return this;
};

clm-a

<%= form_for parent do |parent_form_builder| %>
  <%= parent_form_builder.text_field :name %>
  <% parent.children.each_with_index do |child, index| %>
    <% parent_form_builder.fields_for :children, child do |child_form_builder| %> 
      <%= child_form_builder.select :age, (0..99).to_a %>
      <%# generates "parent[:children_attributes][index][age]" as name for the input %>
    <% end %>
  <% end %>
  <%= f.submit %>
<% end %>

clm-a

# Find me at https://gist.github.com/863277
# Run me with "rails new myapp -J -m https://gist.github.com/raw/863277/rails3-template-with-devise-compass-and-friends.rb"
# You should visit
# http://everydayrails.com/2011/02/28/rails-3-application-templates.html
# http://railswizard.org
# http://stackoverflow.com/questions/4999207/rails-3-application-templates
# https://github.com/fnichol/rails-template-recipes
# for some inspiration about application templates.
# twitter.com/@clmntlxndr