Ruby on rails Rails2+MicrosoftSQLServer:ActiveRecord返回-1但SQLServer返回记录？

为什么ActiveRecord总是通过浏览器或控制台返回-1

SQL语句：

SELECT category.categoryname,  sum(lineitems.qty) as totalSales,  
sum(lineitems.qty*size.sizeship) as volume,  
sum(lineitems.qty*lineitems.purcprice) AS totmerchandise  FROM category, products, 
orders, shipments, lineitems, size  WHERE 
category.categoryid = products.categoryid  AND products.productid = 
lineitems.productid  AND lineitems.posshipid = shipments.posshipid  AND 
shipments.posorderid = orders.posorderid  AND size.sizeid = products.size  AND 
category.categoryid NOT IN (77,79)  AND orders.orderstatus in 
(1,4,5)  AND orders.ordercomplete = 1  AND numbotincase > 0  AND orders.date >= 
'20130501'  AND orders.date < '20130531'  GROUP BY 
category.categoryname  ORDER BY category.categoryname`

当我在MicrosoftSQLServer中执行此操作时，它会加载一组记录。 但是，在Rails中，当我尝试这样做时：

query_for_category_bottles_volume_totalsales = "SELECT category.categoryname,  
sum(lineitems.qty) as totalSales,  sum(lineitems.qty*size.sizeship) as volume,  
sum(lineitems.qty*lineitems.purcprice) AS totmerchandise  FROM category, products, 
orders, shipments, lineitems, size  WHERE category.categoryid = products.categoryid  
AND products.productid = lineitems.productid  AND lineitems.posshipid = 
shipments.posshipid  AND shipments.posorderid = orders.posorderid  AND 
size.sizeid = products.size  AND category.categoryid NOT IN (77,79)  AND 
orders.orderstatus in (1,4,5)  AND orders.ordercomplete = 1  AND numbotincase > 0  
AND orders.date >= '20130501'  AND orders.date < '20130531'  GROUP BY 
category.categoryname  ORDER BY category.categoryname"

category_bottles_volume_totalsales = ActiveRecord::Base.connection.execute(query_for_category_bottles_volume_totalsales)

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这种情况不仅发生在这个查询中，而且也发生在一些简单的查询中：ActiveRecord:：Base.connection.executeselect*from orders，其中id=987；。但是，在控制台中，当我执行Order.find987时，它会返回一条记录

因此，解决方案是改变ActiveRecord进行查询的方式

  database = ActiveRecord::Base.connection

  query_for_category_bottle_casecost_case_price = "SELECT ..."

  category_bottle_casecost_case_price = database.select_all(query_for_category_bottle_casecost_case_price)

---

类别\瓶子\数量\总销售额是否设置为-1？不，该变量是在该行上创建的。请在末尾添加您的问题