OData 生成错误的 URL 还是只是我使用了错误的关键字

Question

我有一个这样的查询，

https://example.com/_vti_bin/exampleService/exampleService.svc/Categories?
$filter=Products/any(x:x/Status eq toupper('DELETED'))&
$select=ID,Products/Status,Products/Title&
$expand=Products

但它不是根据 status = deleted 过滤数据集并返回状态未删除等的产品。

我查看了 SQL 跟踪，它正在生成类似这样的内容，

exec sp_executesql N'SELECT 
    [Project2].[C1] AS [C1], 
    [Project2].[C2] AS [C2], 
    [Project2].[C3] AS [C3], 
    [Project2].[ID] AS [ID], 
    [Project2].[C4] AS [C4], 
    [Project2].[C5] AS [C5], 
    [Project2].[C8] AS [C6], 
    [Project2].[ID1] AS [ID1], 
    [Project2].[C6] AS [C7], 
    [Project2].[C7] AS [C8], 
    [Project2].[Title] AS [Title], 
    [Project2].[Status] AS [Status]
    FROM ( SELECT 
        [Extent1].[ID] AS [ID], 
        1 AS [C1], 
        N''DataAccess.Product'' AS [C2], 
        N''ID'' AS [C3], 
        N''Products'' AS [C4], 
        N'''' AS [C5], 
        [Extent2].[ID] AS [ID1], 
        [Extent2].[Title] AS [Title], 
        [Extent2].[Status] AS [Status], 
        CASE WHEN ([Extent2].[ID] IS NULL) THEN CAST(NULL AS varchar(1)) ELSE N''DataAccess.Product'' END AS [C6], 
        CASE WHEN ([Extent2].[ID] IS NULL) THEN CAST(NULL AS varchar(1)) ELSE N''Title,Status,ID'' END AS [C7], 
        CASE WHEN ([Extent2].[ID] IS NULL) THEN CAST(NULL AS int) ELSE 1 END AS [C8]
        FROM  [dbo].[Categories] AS [Extent1]
        LEFT OUTER JOIN [dbo].[Products] AS [Extent2] ON [Extent1].[ID] = [Extent2].[ProductID]
        WHERE ([Extent1].[ClientID] = @p__linq__0) AND ( EXISTS (SELECT 
            1 AS [C1]
            FROM [dbo].[Products] AS [Extent3]
            WHERE ([Extent1].[ID] = [Extent3].[ProductID]) AND (([Extent3].[Status] = (UPPER(N''DELETED''))) OR (([Extent3].[Status] IS NULL) AND (UPPER(N''DELETED'') IS NULL)))
        ))
    )  AS [Project2]
    ORDER BY [Project2].[ID] ASC, [Project2].[C8] ASC',N'@p__linq__0 int',@p__linq__0=23

如果我只想要状态为“已删除”的产品而不需要其他任何东西，使用“eq”是否正确？

编辑

我正在使用 OData V3，将 WCF 数据服务与 EF 一起使用

Answer 1

我相信问题出在查询中。 形成您所说的网址，例如...

// get me categories
https://example.com/_vti_bin/exampleService/exampleService.svc/Categories?

// where any product is deleted
$filter=Products/any(x:x/Status eq toupper('DELETED'))&

// return the category id, product status and title
$select=ID,Products/Status,Products/Title&
$expand=Products

换句话说，您正在过滤已删除状态的类别，而不是其中的产品。 您可以添加第二个过滤器来处理产品过滤并仅返回类别及其过滤后的产品集。

尝试这样的事情...

https://example.com/_vti_bin/exampleService/exampleService.svc/Categories?
$filter=Products/any(x:x/Status eq toupper('DELETED'))&
$select=ID,Products/Status,Products/Title&
$expand=Products/any(p:p/Status eq toupper('DELETED'))

根据您的情况，最好将查询转过来......

https://example.com/_vti_bin/exampleService/exampleService.svc/Products?
$filter=Status eq toupper('DELETED')&
$select=Category/ID,Status,Title

...通过提取一组产品及其相关类别 ID，您可以获得相同的结果，但可以直接在基本查询中过滤这些产品，而不是更复杂的子集合过滤器。

正如聊天中所讨论的，这确实需要一个有效的 OData 模型，其中正确定义了产品和类别之间的关系。