From acf520457462d3987adbf540625c59e355e4d974 Mon Sep 17 00:00:00 2001
From: Xavier Noria <fxn@hashref.com>
Date: Wed, 7 May 2008 16:04:58 +0200
Subject: applies patch in
http://rails.lighthouseapp.com/projects/8994/tickets/132-document-clear_query_cache
---
.../lib/active_record/connection_adapters/abstract/query_cache.rb | 6 ++++++
1 file changed, 6 insertions(+)
(limited to 'activerecord/lib')
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
index e6b8e3ae90..2afd6064ad 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
@@ -44,6 +44,12 @@ module ActiveRecord
@query_cache_enabled = old
end
+ # Clears the query cache.
+ #
+ # One reason you may wish to call this method explicitly is between queries
+ # that ask the database to randomize results. Otherwise the cache would see
+ # the same SQL query and repeatedly return the same result each time, silently
+ # undermining the randomness you were expecting.
def clear_query_cache
@query_cache.clear if @query_cache
end
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