Method: ActiveRecord::Persistence#increment

Defined in:
activerecord/lib/active_record/persistence.rb

#increment(attribute, by = 1) ⇒ Object

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.



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# File 'activerecord/lib/active_record/persistence.rb', line 632

def increment(attribute, by = 1)
  self[attribute] ||= 0
  self[attribute] += by
  self
end