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    copied!<p>I usually just use flash[:notice] for notification messages such as "Your account was updated successfully" and either flash[:error] or <code>error_msg_for</code> for error messages. I use error_msg_for errors caused by validation failure and flash[:error] for all other kinds of error messages. Unless absolutely necessary I take care not to set them both on the same action. </p> <p>I also try to avoid returning a use to a form they just submitted if their action succeeded. I think it's sending contradictory signals to post a success message and send the user back to the form they just submitted. My rule of thumb is "redirect on success, render on failure." For example, I will <code>redirect to @user</code> if @user is saved on an update, but will render :edit if the save is unsuccessful.</p> <p>Sample controller code.</p> <pre><code>before_filter :identify_user, :except =&gt; :index def update @user = User.find(params[:id]) if @user.update_attributes(params) flash[:notice] = "Your account was updated successfully" redirect_to @user else render :action =&gt; :edit end end def index end def identify_user begin @user = User.find(params[:id]) rescue flash[:error] = "You specified an unknown user" redirect users_path end end </code></pre> <p>My notification partial called in my application layout.</p> <pre><code>&lt;div id="notification_area"&gt; &lt;% flash.each do |key, value| %&gt; &lt;% if value %&gt; &lt;div id="&lt;%=key%&gt;"&gt; &lt;%= value %&gt; &lt;/div&gt; &lt;%end%&gt; &lt;%end%&gt; &lt;/div&gt; </code></pre>
 

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