From 655a3667aa99ae3f7e68024b3971b5783d6396bf Mon Sep 17 00:00:00 2001
From: Jean Boussier <jean.boussier@gmail.com>
Date: Sun, 13 Apr 2014 12:24:59 -0400
Subject: Make counter cache decrementation on destroy idempotent

---
 activerecord/lib/active_record/counter_cache.rb | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'activerecord/lib/active_record/counter_cache.rb')

diff --git a/activerecord/lib/active_record/counter_cache.rb b/activerecord/lib/active_record/counter_cache.rb
index dcbdf75627..a5897edf03 100644
--- a/activerecord/lib/active_record/counter_cache.rb
+++ b/activerecord/lib/active_record/counter_cache.rb
@@ -118,5 +118,26 @@ module ActiveRecord
         update_counters(id, counter_name => -1)
       end
     end
+
+    protected
+
+      def actually_destroyed?
+        @_actually_destroyed
+      end
+
+      def clear_destroy_state
+        @_actually_destroyed = nil
+      end
+
+    private
+
+      def destroy_row
+        affected_rows = super
+
+        @_actually_destroyed = affected_rows > 0
+
+        affected_rows
+      end
+
   end
 end
-- 
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