Sometimes when I create views/controllers and models by hand I forget how rails gets error messages to appear at the top of a page.
Here is a reminder for myself for when I need to add these manually myself (by also extracting into a common pace a calling as follows).
<% flash.each do |key, value| %> <div class="alert alert-<%= key %>"><%= value %></div> <% end %>
<% if @episode.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(@episode.errors.count, "error") %> prohibited this episode from being saved:</h2> <ul> <% @episode.errors.full_messages.each do |msg| %> <li><%= msg %></li> <% end %> </ul> </div> <% end %>
If you ever can’t remember how this is done, just generate a new app and view the default rails output.
You can also extract this logic into a partial and access as follows:
<%= render 'shared/error_messages' %>