Why doesn't Rails' "errors.full_messages" replace attribute and message variables?

Question

Having a strange problem with a rails model I just created.

Here are my validations:

validates_presence_of :from_name, :message => 'Please provide a from name.'
validates_presence_of :from_email
validates_presence_of :giftition_plan_id

I'm having issues using errors.full_messages as well as f.error_messages in my form:

g = Giftition.create
g.errors.first
=> ["from_name", "Please provide a from name."]
>> g.errors.full_messages
=> ["{{attribute}} {{message}}", "{{attribute}} {{message}}", "{{attribute}} {{message}}"]

I'm just getting "{{attribute}} {{message}}". Any ideas?

UPDATE: I've uninstalled rails 3 and all the gems that were installed with it and that made the problem go away. It's not a fix though... I would still like to have rails 3 installed.

UPDATE: Sounds like upgrading to 2.3.9 fixes the problem. Unfortunately, I've given up for now, but sometime in the future I will try that.

Answer 1

I ran into this problem as well with an old 2.3.5 Rails app that I inherited. I had the 5.0 version of the i18n gem installed. I saw that it needs the %{} syntax. Doing this in config/locales/en.yml did the trick:

en:
  activerecord:
    errors:
      full_messages:
        format: "%{attribute} %{message}"

Answer 2

Upgrading to Version rails 2.3.9 fixes this problem

gem install -v 2.3.9 rails --include-dependencies

EDIT:

You also need to edit the config\environment.rb file to change the RAILS_GEM_VERSION.

RAILS_GEM_VERSION = '2.3.9'

EDIT #2:

I should note that version 2.3.9 is not the latest version of the 2.3.X branch, and you should upgrade the the latest version available.

Answer 3

I fixed locally by removing i18n-0.5.0.

experimenting with i18n-0.4.0 yields (while returning the correctly interpolated string):

The {{key}} interpolation syntax in I18n messages is deprecated. Please use %{key} instead.
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:160:in `interpolate_without_deprecated_syntax'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:155:in `gsub'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:155:in `interpolate_without_deprecated_syntax'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:188:in `preserve_encoding'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:154:in `interpolate_without_deprecated_syntax'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/i18n_interpolation_deprecation.rb:21:in `interpolate'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:48:in `translate'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n.rb:152:in `translate'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:119:in `resolve'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:104:in `default'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:103:in `each'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:103:in `default'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n/backend/base.rb:41:in `translate'
/usr/lib/ruby/gems/1.8/gems/i18n-0.4.0/lib/i18n.rb:152:in `translate'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/validations.rb:78:in `generate_message'

I guess 0.5.0 turns up the pain by outputting non-interpolated strings.

---

i18n is required by activesupport, so the way I got around loading the most recent version (0.5.0) is:

in config/preinitializer.rb ('secret' lifecycle hook that loads before activesupport):

require 'rubygems'
begin
  gem 'i18n', "~> 0.4.0"
rescue LoadError
  # no biggie, optional anyway
end

Answer 4

so i keep seeing upgrading rails as the solution to this

... or you can simply downgrade i18n to version 0.4

as outlined in this post

getting {{attribute}} {{message}} in RoR views