ruby 否定ActiveRecord范围

Posted 2021-05-16

scope :finished, -> { where.not(not_finished.where_values.reduce(:and)) }

# https://blog.pivotal.io/pivotal-labs/labs/logically-negating-an-activerecord-scope
scope :not, ->(scope_name) { where(send(scope_name).where_values.reduce(:and).not) }
Post.not(:recently_tagged)

scope(:not), ->(scope) { where(scope.where_values.reduce(:and).not) }