class method
self.decrement_counter
Ruby on Rails 2.2.3
Since v2.2.3 Last seen in v2.3.18Available in: v2.2.3 v2.3.18
Signature
self.decrement_counter(counter_name, id)Decrement a number field by one, usually representing a count.
This works the same as increment_counter but reduces the column value by 1 instead of increasing it.
Parameters
-
counter_name- The name of the field that should be decremented. -
id- The id of the object that should be decremented.
Examples
# Decrement the post_count column for the record with an id of 5 DiscussionBoard.decrement_counter(:post_count, 5)
Parameters
-
counter_namereq -
idreq
Source
# File activerecord/lib/active_record/base.rb, line 943
def decrement_counter(counter_name, id)
update_counters(id, counter_name => -1)
end
Defined in activerecord/lib/active_record/base.rb line 943
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Defined in ActiveRecord::Base