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

increment(attribute, by = 1)

Initializes attribute to zero if nil and adds the value passed as by (default is 1). The increment 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 2484
      def increment(attribute, by = 1)
        self[attribute] ||= 0
        self[attribute] += by
        self
      end

Defined in activerecord/lib/active_record/base.rb line 2484 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::Base

Signature

Parameters