Ruby on Rails 6.0 Beta 1 Deprecations

About this time last year, I covered Ruby on Rails 5.2 Deprecations and got lots of appreciative feedback. With the upcoming next major update of Ruby on Rails, I’d figure that I would do a new article and make it a tradition.

NOTE: Ruby on Rails 6.0 will require Ruby 2.5.0. So if you’re stuck on an older version of Ruby for whatever reason, you may want to consider holding off on updating your application to 6.0.

I will likely update this article as later betas and release candidates come.

ActionMailer

Deprecate ActionMailer::Base.receive in favor of  Action Mailbox .

Add  MailDeliveryJob for delivering both regular and parameterized mail. Deprecate using  DeliveryJob and  Parameterized::DeliveryJob .

ActionPack

Remove deprecated fragment_cache_key helper in favor of  combined_fragment_cache_key .

Remove deprecated methods in ActionDispatch::TestResponse .

#success? ,  missing? and  error? were deprecated in Rails 5.2 in favor of  #successful? ,  not_found? and  server_error? .

Deprecate ActionDispatch::Http::ParameterFilter in favor of  ActiveSupport::ParameterFilter .

Controller level force_ssl has been deprecated in favor of  config.force_ssl .

ActionView

Remove deprecated image_alt helper.

Deprecate calling private model methods from view helpers.

For example, in methods like  options_from_collection_for_select and  collection_select it is possible to call private methods from the objects used.

ActiveRecord

Remove deprecated #set_state from the transaction object.

Remove deprecated #supports_statement_cache? from the database adapters.

Remove deprecated #insert_fixtures from the database adapters.

Remove deprecated ActiveRecord::ConnectionAdapters::SQLite3Adapter#valid_alter_table_type? .

Deprecate config.activerecord.sqlite3.represent_boolean_as_integer .

Remove deprecated ActiveRecord::Migrator.migrations_path= .

Remove deprecated expand_hash_conditions_for_aggregates .

Deprecate passing migrations_paths to  connection.assume_migrated_upto_version .

Deprecate ActiveRecord::Result#to_hash in favor of  ActiveRecord::Result#to_a .

Deprecate column_name_length ,  table_name_length ,  columns_per_table ,  indexes_per_table ,  columns_per_multicolumn_index ,  sql_query_length , and  joins_per_query methods in  DatabaseLimits .

Deprecate update_attributes / ! in favor of  update / ! .

ActiveStorage

Replace config.active_storage.queue with two options that indicate which queues analysis and purge jobs should use, respectively:

config.active_storage.queues.analysis
config.active_storage.queues.purge

config.active_storage.queue is preferred over the new options when it’s set, but it is deprecated and will be removed in Rails 6.1.

Add ActiveStorage::Blob#open , which downloads a blob to a tempfile on disk and yields the tempfile. Deprecate  ActiveStorage::Downloading .

Use the ImageProcessing gem for Active Storage variants, and deprecate the MiniMagick backend.

This means that variants are now automatically oriented if the original image was rotated. Also, in addition to the existing ImageMagick operations, variants can now use :resize_to_fit ,  :resize_to_fill , and other ImageProcessing macros. These are now recommended over raw  :resize , as they also sharpen the thumbnail after resizing.

The ImageProcessing gem also comes with a backend implemented on libvips , an alternative to ImageMagick which has significantly better performance than ImageMagick in most cases, both in terms of speed and memory usage. In Active Storage it’s now possible to switch to the libvips backend by changing  Rails.application.config.active_storage.variant_processor to  :vips .

ActiveSupport

Remove deprecated Module#reachable? method.

Remove deprecated #acronym_regex method from  Inflections .

Deprecate ActiveSupport::Multibyte::Unicode#pack_graphemes(array) and  ActiveSuppport::Multibyte::Unicode#unpack_graphemes(string) in favor of  array.flatten.pack("U*") and  string.scan(/\X/).map(&:codepoints) , respectively.

Deprecate ActiveSupport::Multibyte::Chars.consumes? in favor of  String#is_utf8? .

Deprecate ActiveSupport::Multibyte::Unicode#normalize and  ActiveSuppport::Multibyte::Chars#normalize in favor of  String#unicode_normalize

Deprecate ActiveSupport::Multibyte::Unicode#downcase/upcase/swapcase in favor of String#downcase/upcase/swapcase .

Deprecate the use of LoggerSilence in favor of  ActiveSupport::LoggerSilence

Deprecate using negative limits in String#first and  String#last .

Allow Range#=== and  Range#cover? on Range.

Range#cover? can now accept a range argument like  Range#include? and  Range#=== .  Range#=== works correctly on Ruby 2.6.  Range#include? is moved into a new file, with these two methods

Requiring active_support/core_ext/range/include_range is now deprecated. Use  require "active_support/core_ext/range/compare_range"  instead.