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method

increment

Importance_1
Ruby on Rails latest stable (v4.0.2) - 0 notes - Class: ActiveRecord::Persistence
increment(attribute, by = 1) public

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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