From e3f86c80512afc7fda4c98b753c7b103331731b1 Mon Sep 17 00:00:00 2001
From: Geoff Harcourt <geoff.harcourt@gmail.com>
Date: Sat, 28 Dec 2013 15:01:39 -0500
Subject: [PATCH] Only define Impressionable::ClassMethods::DEFAULT_CACHE when
 undefined

Current behavior causes unnecessary warning messages to be issued when
using Impressionist with application preloaders such as spring.
---
 app/models/impressionist/impressionable.rb | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/app/models/impressionist/impressionable.rb b/app/models/impressionist/impressionable.rb
index c9159bc..76a2b9f 100644
--- a/app/models/impressionist/impressionable.rb
+++ b/app/models/impressionist/impressionable.rb
@@ -5,7 +5,13 @@ module Impressionist
     module ClassMethods
       attr_accessor :impressionist_cache_options
 
-      DEFAULT_CACHE = { :counter_cache => false, :column_name => :impressions_count, :unique => false }
+      unless defined?(DEFAULT_CACHE)
+        DEFAULT_CACHE = {
+          :counter_cache => false,
+          :column_name => :impressions_count,
+          :unique => false
+        }
+      end
 
       def impressionist_counter_cache_options
         @impressionist_cache_options ||= {}