instance method
increment!
Ruby on Rails edge
Since v3.0.20Signature
increment!(attribute, by = 1, touch: nil)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.
Parameters
-
attributereq -
byopt = 1 -
touchkey = nil
Source
# File activerecord/lib/active_record/persistence.rb, line 645
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)
counters = { attribute => change, touch: touch }
self.class.all_queries_scope.where!(_query_constraints_hash).update_counters(counters)
public_send(:"clear_#{attribute}_change")
self
end
Defined in activerecord/lib/active_record/persistence.rb line 645
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Defined in ActiveRecord::Persistence