method

increment!

v8.1.1 - Show latest stable - Class: ActiveRecord::Persistence

increment!(attribute, by = 1, touch: nil)

public

Wrapper around #increment that writes the update to the database. Only attribute is updated; the record itself is not saved. This means that any other modified attributes will still be dirty. Validations and callbacks are skipped. Supports the touch option from update_counters, see that for more.

This method raises an ActiveRecord::ActiveRecordError when called on new objects, or when at least one of the attributes is marked as readonly.

Returns self.

# File activerecord/lib/active_record/persistence.rb, line 672
    def increment!(attribute, by = 1, touch: nil)
      raise ActiveRecordError, "cannot update a new record" if new_record?
      raise ActiveRecordError, "cannot update a destroyed record" if destroyed?

      increment(attribute, by)
      change = public_send(attribute) - (public_send(:"#{attribute}_in_database") || 0)
      self.class.update_counters(id, attribute => change, touch: touch)
      public_send(:"clear_#{attribute}_change")
      self
    end

increment!

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