<%= error_messages_for("forum_post") %>

<%= simple_form_for(forum_post) do |f| %>
  <%= f.input :topic_id, :as => :hidden %>
  <%= dtext_field "forum_post", "body", :classes => "autocomplete-mentions" %>

  <%= f.button :submit, "Submit", :data => { :disable_with => "Submitting..." } %>
  <%= dtext_preview_button "forum_post", "body" %>
<% end %>
