Rails 6 adds negative scopes on enum
Rails 6 now by default adds negative enum scopes to filter records easily.
ReadRails 5 Active Record attributes API
Rails 5 makes the attribute API public to converts the attribute value to an appropriate Ruby type.
ReadRuby 2.6 Range#cover? accepts Range object as argument
Ruby 2.6 Range#cover? accepts Range object as argument and returns boolean if the object is comparable and within range.
ReadWhat happened to ActiveRecord::Base in Rails 5?
In Rails 5, ActiveRecord models no longer inherit from ActiveRecord::Base. ActiveRecord models now inherit from Application Record.
ReadMagic frozen string literal comment in Ruby 2.3
Adding string immutability in Ruby 2.3 by adding the magic comment on the top of the file
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