gistfile1.rb

## show.html.erb
<p>
  <b>Title:</b>
	<%= editable_field @project, :title %>
</p>
<p>


##project_controller.rb 
  def update
    @project = Project.find(params[:id])
      @project.update_attributes!(params[:project])

    respond_to do |format|
      if request.xhr?
        # *** repond with the new value ***
        render :text => params[:project].values.first
      else
        redirect_to(@project, :notice => 'P was successfully updated.')
      end
    end
  end