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decrement

decrement(attribute, by = 1)

Instance Public methods

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.

Links:

https://github.com/rails/rails/blob/abb92690ee7c3e447427963ad6000526908c1e53/activerecord/lib/active_record/persistence.rb#L308

doc_ruby_on_rails

2015-06-20 00:00:00

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