app/views/customailer/mail_templates/_form.html.erb
<%= form_for(@mail_template) do |f| %>
<% if @mail_template.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@mail_template.errors.count, "error") %> prohibited this mail template from being saved:</h2>
<ul>
<% @mail_template.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :body %><br />
<%= f.text_area :body %>
</div>
<div class="field">
<%= f.label :path %><br />
<%= f.text_field :path %>
</div>
<div class="field">
<%= f.label :locale %><br />
<%= f.select :locale, I18n.available_locales %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>