ちょうど Rails enum でなんで強制ArgumentErrorやねーんってなってたところなのでこの変更はありがたい » Make enums validatable without raising error by mechnicov · Pull Request #49100 · rails/rails https://t.co/jeBFkfAD3n

— toshimaru (@toshimaru_e) September 7, 2023

Rails enum validataion

class Conversation < ActiveRecord::Base
  enum :status, [ :active, :archived ], validate: true
end

conversation = Conversation.new

conversation.status = :unknown
conversation.valid? # => false

conversation.status = nil
conversation.valid? # => false

conversation.status = :active
conversation.valid? # => true

ref. ActiveRecord::Enum | RailsDoc(β)