Working on a rails form generator. As easy as:

<%= easy_form_for(@user) %>

or as advanced as:

<%= easy_form_for(@user,

                :only => [:name, (:username if @user.username.blank?), :email, :birthday, :city, :state_id, :zipcode, :country_id, :bio, :diet_id, :me_gender, :you_gender],
                :field_options => {
                  :email    => {:type => "email", :autocapitalize => "off"},
                  :submit   => {:disable_with => "Saving…".html_safe, :class => "button white full"},
                  :birthday => {
                    :order         => [:month, :day, :year],
                    :start_year    => 12.years.ago.year,
                    :end_year      => 60.years.ago.year,
                    :include_blank => true},
                  :me_gender  => {:label => "My Gender"},
                  :you_gender => {:label => "Desired Gender"}
                }) do |f| %>

<%= f.label :label_id, "My Straightedginess" %>
<table id="my-label">
  <% Label.all.each do |label| %>
    <tr>
      <td><%= f.radio_button :label_id,              label.id, :checked => @user.label == label %></td>
      <th><%= f.label        "label_id_#{label.id}", label.name.titleize %></th>
    </tr>
  <% end %>
</table>

<%= f.label :your_labels_attributes, "Desired Straightedginess" %>
<table id="desired-labels">
  <% Label.all.each_with_index do |label, index| %>
    <%= f.fields_for "your_labels_attributes[#{index}]", :child_index => index do |ff| %>
      <tr>
        <% if @user.desired_labels.include? label %>
          <%# HACK remove find from view, do it in the controller %>
          <%= ff.hidden_field :id, :value => @user.your_labels.where(:label_id => label.id).first.id, :style => "display:none" %>
          <td><%= ff.check_box :_destroy, { :checked => true }, 0, 1 %></td>
          <th><%= ff.label     :_destroy, label.name.titleize %></th>
        <% else %>
          <td><%= ff.check_box :label_id, {}, label.id %></td>
          <th><%= ff.label     :label_id, label.name.titleize %></th>
        <% end %>
      </th>
    <% end %>
  <% end %>
</table>

<% end %>