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-rw-r--r--activerecord/lib/active_record/railtie.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb
index dfe255ad7c..5d0424a543 100644
--- a/activerecord/lib/active_record/railtie.rb
+++ b/activerecord/lib/active_record/railtie.rb
@@ -22,6 +22,9 @@ module ActiveRecord
config.app_middleware.insert_after "::ActionDispatch::Callbacks",
"ActiveRecord::ConnectionAdapters::ConnectionManagement"
+ config.app_middleware.insert_after "::ActionDispatch::Callbacks",
+ "ActiveRecord::IdentityMap::Middleware"
+
rake_tasks do
load "active_record/railties/databases.rake"
end