method
decrement_counter
v3.2.1 -
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- Class:
ActiveRecord::CounterCache
decrement_counter(counter_name, id)public
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)