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Gracefully handle upgrading apps with observers

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Rather than just raising a NoMethodError when copying the config, this
commit adds a warning message until either the rails-observers gem is
installed or the relevant config options are removed.
This commit is contained in:
Rafael Mendonça França 2012-11-28 21:55:07 -02:00
parent ccecab3ba9
commit f862376d16
1 changed files with 12 additions and 0 deletions
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12
activerecord/lib/active_record/railtie.rb
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@ -115,6 +115,18 @@ module ActiveRecord
See http://edgeguides.rubyonrails.org/security.html#mass-assignment for more information
EOF
end
unless app.config.active_record.delete(:observers).nil?
ActiveSupport::Deprecation.warn <<-EOF.strip_heredoc, []
Active Record Observers has been extracted out of Rails into a gem.
Please use callbaks or add `rails-observers` to your Gemfile to use observers.
To disable this message remove the `observers` option from your
`config/application.rb` or from your initializers.
See http://edgeguides.rubyonrails.org/4_0_release_notes.html for more information
EOF
end
ensure
ActiveSupport::Deprecation.behavior = old_behavior
end