include_eager_conditions?

# File activerecord/lib/active_record/associations.rb, line 1197
        def include_eager_conditions?(options)
          # look in both sets of conditions
          conditions = [scope(:find, :conditions), options[:conditions]].inject([]) do |all, cond|
            case cond
              when nil   then all
              when Array then all << cond.first
              else            all << cond
            end
          end
          return false unless conditions.any?
          conditions.join(' ').scan(/(\w+)\.\w+/).flatten.any? do |condition_table_name|
            condition_table_name != table_name
          end
        end