[Rails] Re: Error with errors

Neil Bye wrote in post #1018907:
> I have an app which I have upgraded to rails3. It is working fine but
> for displaying error messages.
>
> Take i.e. new.html.erb. In the model I have several validations that
> work, they do not create a user if the entries are wrong. On submission
> it dutifully returns to new.html.erb but WITHOUT the nice red error
> messages.
>
> I have been using
>
> <% if @user.errors.any? %>
> <div id="error_explanation">
> <h2><%= pluralize(@user.errors.count, "error") %> prohibited this
> user from being saved:</h2>
>
> <ul>
> <% @user.errors.full_messages.each do |msg| %>
> <li><%= msg %></li>
> <% end %>
> </ul>
> </div>
> <% end %>
>
> but that doesn't help.
>

1) Is that a partial? If so, are you actually including it in a view
somewhere, e.g.

<%= render '...../error_messages' %>

2) Is the partial named correctly, e.g.: '_error_messages.html.erb ?

3) I'm not quite sure what the directory rules are for rails, but is the
partial in a directory that can be accessed by multiple controllers,
e.g. app/views/shared/_error_messages.html.erb?

> Of course, you would have to have I think the problem may be deeper. Do you know
> what files are used when displaying the errors? Where does the error
> variable come from?.

It's 'errors' not 'error', and @user is an ActiveRecord::Base object, so
the errors() method must be defined in that class or one of that class's
parent classes.

> Could it be a js problem?

Sure. If your js says to hide any html elememts with
id="error_explanation", then none of the error messages will be visible.

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