patch_active_record_search_path_to_not_set_already_set_search_path.rb

module ActiveRecord
  module ConnectionAdapters
    module PostgreSQL
      module SchemaStatements
        alias_method :old_schema_search_path=, :schema_search_path=
        alias_method :old_schema_search_path, :schema_search_path

        def schema_search_path=(schema_csv)
          unless schema_search_path == schema_csv
            self.old_schema_search_path                                    = schema_csv
            (Thread.current[:schema_search_path_caches] ||= {})[object_id] = schema_csv
          end
        end

        def schema_search_path
          caches = Thread.current[:schema_search_path_caches] ||= {}
          caches[object_id] ||= old_schema_search_path
        end
      end
    end
  end
end