instance method
decrement
Ruby on Rails edge
Since v3.0.20Signature
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
-
attributereq -
byopt = 1
Source
# File activerecord/lib/active_record/persistence.rb, line 661
def decrement(attribute, by = 1)
increment(attribute, -by)
end
Defined in activerecord/lib/active_record/persistence.rb line 661
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Defined in ActiveRecord::Persistence