decrement(attribute, by = 1) — ActiveRecord::Base

decrement(attribute, by = 1)

Initializes attribute to zero if nil and subtracts the value passed as by (default is 1). The decrement is performed directly on the underlying attribute, no setter is invoked. Only makes sense for number-based attributes. Returns self.

Parameters

attribute req
by opt = 1

Source

# File activerecord/lib/active_record/base.rb, line 2501
      def decrement(attribute, by = 1)
        self[attribute] ||= 0
        self[attribute] -= by
        self
      end

Defined in activerecord/lib/active_record/base.rb line 2501 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::Base

Signature

Parameters