f.error_messages in Rails 3.0

Question

Rails 3.0 deprecated f.error_messages and now requires a plugin to work correctly - I however want to learn how to display error messages the (new) native way.

Answer 1

I'm pretty sure all you'd need to do is reference @post.comments

So you could do something like:

<% @post.comments.each do |comment| %>
    <% if comment.errors.any? %>

    <% comment.errors.full_messages.each do |msg| %>
        
<%= msg %>
    <% end %>

    <% end %>
<% end %>

Or just pull all the errors out out:

comment_errors = @post.comments.map(&:errors)

and then loop through them in your display logic to output each of the comment errors.