gistfile1.erb

<%- elements.group_by{|value, _, _| form.object.column_by_name(value).options[:group]}.each do |group, options| -%>
<%= group.humanize %>
<% options.each do |value, label, checked| %>
<%- id = [form.object_name, filter.name, value].join('_').underscore -%>
<%= form.label filter.name, options.merge(:for => id) do -%>
<%= form.check_box(filter.name, form.datagrid_extra_checkbox_options.merge(:multiple => true, :id => id, :checked => checked), value.to_s, nil) -%>
<%= text -%>
<%- end -%>
<%- end -%>
<%- end -%>