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Rails app error messages helper... allows <%= f.error_messages %> in form_for blocks.
module ErrorMessagesHelper
# Render error messages for the given objects. The :message and :header_message options are allowed.
def error_messages_for(*objects)
options = objects.extract_options!
# options[:header_message] ||= I18n.t(:"activerecord.errors.header", :default => "Invalid Fields")
# options[:message] ||= I18n.t(:"activerecord.errors.message", :default => "Correct the following errors and try again.")
messages = objects.compact.map { |o| o.errors.full_messages }.flatten
unless messages.empty?
content_tag(:div, :class => "message message--error") do
list_items = messages.map { |msg| content_tag(:li, msg) }
content_tag(:ul, list_items.join.html_safe)
end
end
end
module FormBuilderAdditions
def error_messages(options = {})
@template.error_messages_for(@object, options)
end
end
end
ActionView::Helpers::FormBuilder.send(:include, ErrorMessagesHelper::FormBuilderAdditions)
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@leonardofaria leonardofaria commented Aug 28, 2014

I just updated the code to works fine in Rails 4
https://gist.github.com/leonardofaria/bf88d8fb1e5cf1fd2a0b

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