Rails 3 deprecated methods and APIs
Where can one find a list of deprecated methods, APIs, etc, in order to upgrade from Rails 2.x to Rails 3?
Answer
The Rails 3 release notes have lots of good information:
Railties now deprecates:
- RAILS_ROOT in favor of Rails.root,
- RAILS_ENV in favor of Rails.env, and
- RAILS_DEFAULT_LOGGER in favor of Rails.logger.
ActionController:
- The cookie_verifier_secret has been deprecated and now instead it is assigned through Rails.application.config.cookie_secret and moved into its own file: config/initializers/cookie_verification_secret.rb.
- filter_parameter_logging is deprecated in favor of config.filter_parameters << :password.
ActiveRecord
- named_scope in an Active Record class is deprecated and has been renamed to just scope.
- save(false) is deprecated, in favor of save(:validate => false).
- model.errors.on is deprecated in favor of model.errors[]
- ActiveRecord::Base.colorize_logging and config.active_record.colorize_logging are deprecated in favor of Rails::LogSubscriber.colorize_logging or config.colorize_logging
ActionMailer
- :charset, :content_type, :mime_version, :implicit_parts_order are all deprecated in favor of ActionMailer.default :key => value style declarations.
- Mailer dynamic create_method_name and deliver_method_name are deprecated, just call method_name which now returns a Mail::Message object.
- ActionMailer.deliver(message) is deprecated, just call message.deliver.
- template_root is deprecated, pass options to a render call inside a proc from the format.mime_type method inside the mail generation block
- The body method to define instance variables is deprecated (body {:ivar => value}), just declare instance variables in the method directly and they will be available in the view.
- Mailers being in app/models is deprecated, use app/mailers instead.