construct_conditions

# File activerecord/lib/active_record/associations/has_many_through_association.rb, line 122
        def construct_conditions
          table_name = @reflection.through_reflection.quoted_table_name
          conditions = construct_quoted_owner_attributes(@reflection.through_reflection).map do |attr, value|
            "#{table_name}.#{attr} = #{value}"
          end
          conditions << sql_conditions if sql_conditions
          "(" + conditions.join(') AND (') + ")"
        end