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-rw-r--r--activerecord/lib/arel/visitors/visitor.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/arel/visitors/visitor.rb b/activerecord/lib/arel/visitors/visitor.rb
index d65ac820bc..9066307aed 100644
--- a/activerecord/lib/arel/visitors/visitor.rb
+++ b/activerecord/lib/arel/visitors/visitor.rb
@@ -15,7 +15,7 @@ module Arel # :nodoc: all
attr_reader :dispatch
def self.dispatch_cache
- Hash.new do |hash, klass|
+ @dispatch_cache ||= Hash.new do |hash, klass|
hash[klass] = "visit_#{(klass.name || '').gsub('::', '_')}"
end
end