moving method to subclass that actually uses the method

activerecord/lib/active_record/associations/class_methods/join_dependency/join_association.rb

@@ -123,6 +123,10 @@ def process_conditions(conditions, table_name)
             Arel.sql(interpolate_sql(sanitize_sql(conditions, table_name)))
           end
 
+          def sanitize_sql(condition, table_name)
+            active_record.send(:sanitize_sql, condition, table_name)
+          end
+
           def join_target_table(relation, *conditions)
             relation = relation.join(target_table, join_type)
 

activerecord/lib/active_record/associations/class_methods/join_dependency/join_part.rb

@@ -14,7 +14,7 @@ class JoinPart # :nodoc:
           # association.
           attr_reader :active_record
 
-          delegate :table_name, :column_names, :primary_key, :reflections, :sanitize_sql, :arel_engine, :to => :active_record
+          delegate :table_name, :column_names, :primary_key, :reflections, :arel_engine, :to => :active_record
 
           def initialize(active_record)
             @active_record = active_record