Question

我有以下表结构：

Entity Framework model

也就是说，供应商与人（人）之间存在多对多的关系。

供应商1 - * SupplierPerson * - 1人

一个人与EmaiLAddresses，TelephoneNumbers和WebResources有一对多的关系。

第1人 - * EmailAddress
  人1 - * TelephoneNumber
  人1 - * WebResource

我突出了导航属性。

鉴于LINQ-to-Entities使用.Include（）加载依赖项并对结果集进行整形：

    ObjectQuery<Supplier> supplierQuery=((SopEntities)Context).Suppliers
                .Include("People")
                .Include("People.TelephoneNumbers")
                .Include("People.EmailAddresses")
                .Include("People.WebResources");
#if TRACE
            Trace.WriteLine(string.Format("GetAll(): {0}", supplierQuery.ToTraceString()));
#endif
            return supplierQuery;

我得到了疯狂的大而无用的SQL：

SELECT 
[Project5].[ID] AS [ID], 
[Project5].[Key] AS [Key], 
[Project5].[CompanyName] AS [CompanyName], 
[Project5].[AddressLine1] AS [AddressLine1], 
[Project5].[AddressLine2] AS [AddressLine2], 
[Project5].[TownCity] AS [TownCity], 
[Project5].[CountyState] AS [CountyState], 
[Project5].[Postcode] AS [Postcode], 
[Project5].[Country] AS [Country], 
[Project5].[C25] AS [C1], 
[Project5].[C2] AS [C2], 
[Project5].[C3] AS [C3], 
[Project5].[C4] AS [C4], 
[Project5].[C5] AS [C5], 
[Project5].[C6] AS [C6], 
[Project5].[C7] AS [C7], 
[Project5].[C8] AS [C8], 
[Project5].[C9] AS [C9], 
[Project5].[C10] AS [C10], 
[Project5].[C11] AS [C11], 
[Project5].[C1] AS [C12], 
[Project5].[C12] AS [C13], 
[Project5].[C13] AS [C14], 
[Project5].[C14] AS [C15], 
[Project5].[C15] AS [C16], 
[Project5].[C16] AS [C17], 
[Project5].[C17] AS [C18], 
[Project5].[C18] AS [C19], 
[Project5].[C19] AS [C20], 
[Project5].[C20] AS [C21], 
[Project5].[C21] AS [C22], 
[Project5].[C22] AS [C23], 
[Project5].[C23] AS [C24], 
[Project5].[C24] AS [C25]
FROM ( SELECT 
    [Extent1].[ID] AS [ID], 
    [Extent1].[Key] AS [Key], 
    [Extent1].[CompanyName] AS [CompanyName], 
    [Extent1].[AddressLine1] AS [AddressLine1], 
    [Extent1].[AddressLine2] AS [AddressLine2], 
    [Extent1].[TownCity] AS [TownCity], 
    [Extent1].[CountyState] AS [CountyState], 
    [Extent1].[Postcode] AS [Postcode], 
    [Extent1].[Country] AS [Country], 
    [UnionAll2].[C1] AS [C1], 
    [UnionAll2].[C2] AS [C2], 
    [UnionAll2].[C3] AS [C3], 
    [UnionAll2].[C4] AS [C4], 
    [UnionAll2].[C5] AS [C5], 
    [UnionAll2].[C6] AS [C6], 
    [UnionAll2].[C7] AS [C7], 
    [UnionAll2].[C8] AS [C8], 
    [UnionAll2].[C9] AS [C9], 
    [UnionAll2].[C10] AS [C10], 
    [UnionAll2].[C11] AS [C11], 
    [UnionAll2].[C12] AS [C12], 
    [UnionAll2].[C13] AS [C13], 
    [UnionAll2].[C14] AS [C14], 
    [UnionAll2].[C15] AS [C15], 
    [UnionAll2].[C16] AS [C16], 
    [UnionAll2].[C17] AS [C17], 
    [UnionAll2].[C18] AS [C18], 
    [UnionAll2].[C19] AS [C19], 
    [UnionAll2].[C20] AS [C20], 
    [UnionAll2].[C21] AS [C21], 
    [UnionAll2].[C22] AS [C22], 
    [UnionAll2].[C23] AS [C23], 
    [UnionAll2].[C24] AS [C24], 
    CASE WHEN ([UnionAll2].[C2] IS NULL) THEN CAST(NULL AS int) ELSE 1 END AS [C25]
    FROM  [dbo].[Supplier] AS [Extent1]
    OUTER APPLY  (SELECT 
        [UnionAll1].[C1] AS [C1], 
        [UnionAll1].[PersonID] AS [C2], 
        [UnionAll1].[SupplierID] AS [C3], 
        [UnionAll1].[SupplierID1] AS [C4], 
        [UnionAll1].[ID] AS [C5], 
        [UnionAll1].[Title] AS [C6], 
        [UnionAll1].[FirstName] AS [C7], 
        [UnionAll1].[Initials] AS [C8], 
        [UnionAll1].[LastName] AS [C9], 
        [UnionAll1].[Position] AS [C10], 
        [UnionAll1].[DepartmentID] AS [C11], 
        [UnionAll1].[ID1] AS [C12], 
        [UnionAll1].[Number] AS [C13], 
        [UnionAll1].[Name] AS [C14], 
        [UnionAll1].[PersonID1] AS [C15], 
        [UnionAll1].[TelephoneNumberTypeID] AS [C16], 
        [UnionAll1].[C2] AS [C17], 
        [UnionAll1].[C3] AS [C18], 
        [UnionAll1].[C4] AS [C19], 
        [UnionAll1].[C5] AS [C20], 
        [UnionAll1].[C6] AS [C21], 
        [UnionAll1].[C7] AS [C22], 
        [UnionAll1].[C8] AS [C23], 
        [UnionAll1].[C9] AS [C24]
        FROM  (SELECT 
            CASE WHEN ([Extent4].[ID] IS NULL) THEN CAST(NULL AS int) ELSE 1 END AS [C1], 
            [Extent2].[PersonID] AS [PersonID], 
            [Extent2].[SupplierID] AS [SupplierID], 
            [Extent2].[SupplierID] AS [SupplierID1], 
            [Extent3].[ID] AS [ID], 
            [Extent3].[Title] AS [Title], 
            [Extent3].[FirstName] AS [FirstName], 
            [Extent3].[Initials] AS [Initials], 
            [Extent3].[LastName] AS [LastName], 
            [Extent3].[Position] AS [Position], 
            [Extent3].[DepartmentID] AS [DepartmentID], 
            [Extent4].[ID] AS [ID1], 
            [Extent4].[Number] AS [Number], 
            [Extent4].[Name] AS [Name], 
            [Extent4].[PersonID] AS [PersonID1], 
            [Extent4].[TelephoneNumberTypeID] AS [TelephoneNumberTypeID], 
            CAST(NULL AS int) AS [C2], 
            CAST(NULL AS varchar(1)) AS [C3], 
            CAST(NULL AS varchar(1)) AS [C4], 
            CAST(NULL AS int) AS [C5], 
            CAST(NULL AS int) AS [C6], 
            CAST(NULL AS varchar(1)) AS [C7], 
            CAST(NULL AS varchar(1)) AS [C8], 
            CAST(NULL AS int) AS [C9]
            FROM   [dbo].[SupplierPerson] AS [Extent2]
            INNER JOIN [dbo].[Person] AS [Extent3] ON [Extent3].[ID] = [Extent2].[PersonID]
            LEFT OUTER JOIN [dbo].[TelephoneNumber] AS [Extent4] ON [Extent3].[ID] = [Extent4].[PersonID]
            WHERE [Extent1].[ID] = [Extent2].[SupplierID]
        UNION ALL
            SELECT 
            2 AS [C1], 
            [Extent5].[PersonID] AS [PersonID], 
            [Extent5].[SupplierID] AS [SupplierID], 
            [Extent5].[SupplierID] AS [SupplierID1], 
            [Extent6].[ID] AS [ID], 
            [Extent6].[Title] AS [Title], 
            [Extent6].[FirstName] AS [FirstName], 
            [Extent6].[Initials] AS [Initials], 
            [Extent6].[LastName] AS [LastName], 
            [Extent6].[Position] AS [Position], 
            [Extent6].[DepartmentID] AS [DepartmentID], 
            CAST(NULL AS int) AS [C2], 
            CAST(NULL AS varchar(1)) AS [C3], 
            CAST(NULL AS varchar(1)) AS [C4], 
            CAST(NULL AS int) AS [C5], 
            CAST(NULL AS int) AS [C6], 
            [Extent7].[ID] AS [ID1], 
            [Extent7].[Email] AS [Email], 
            [Extent7].[Name] AS [Name], 
            [Extent7].[PersonID] AS [PersonID1], 
            CAST(NULL AS int) AS [C7], 
            CAST(NULL AS varchar(1)) AS [C8], 
            CAST(NULL AS varchar(1)) AS [C9], 
            CAST(NULL AS int) AS [C10]
            FROM   [dbo].[SupplierPerson] AS [Extent5]
            INNER JOIN [dbo].[Person] AS [Extent6] ON [Extent6].[ID] = [Extent5].[PersonID]
            INNER JOIN [dbo].[EmailAddress] AS [Extent7] ON [Extent6].[ID] = [Extent7].[PersonID]
            WHERE [Extent1].[ID] = [Extent5].[SupplierID]) AS [UnionAll1]
    UNION ALL
        SELECT 
        3 AS [C1], 
        [Extent8].[PersonID] AS [PersonID], 
        [Extent8].[SupplierID] AS [SupplierID], 
        [Extent8].[SupplierID] AS [SupplierID1], 
        [Extent9].[ID] AS [ID], 
        [Extent9].[Title] AS [Title], 
        [Extent9].[FirstName] AS [FirstName], 
        [Extent9].[Initials] AS [Initials], 
        [Extent9].[LastName] AS [LastName], 
        [Extent9].[Position] AS [Position], 
        [Extent9].[DepartmentID] AS [DepartmentID], 
        CAST(NULL AS int) AS [C2], 
        CAST(NULL AS varchar(1)) AS [C3], 
        CAST(NULL AS varchar(1)) AS [C4], 
        CAST(NULL AS int) AS [C5], 
        CAST(NULL AS int) AS [C6], 
        CAST(NULL AS int) AS [C7], 
        CAST(NULL AS varchar(1)) AS [C8], 
        CAST(NULL AS varchar(1)) AS [C9], 
        CAST(NULL AS int) AS [C10], 
        [Extent10].[ID] AS [ID1], 
        [Extent10].[Url] AS [Url], 
        [Extent10].[Name] AS [Name], 
        [Extent10].[PersonID] AS [PersonID1]
        FROM   [dbo].[SupplierPerson] AS [Extent8]
        INNER JOIN [dbo].[Person] AS [Extent9] ON [Extent9].[ID] = [Extent8].[PersonID]
        INNER JOIN [dbo].[WebResource] AS [Extent10] ON [Extent9].[ID] = [Extent10].[PersonID]
        WHERE [Extent1].[ID] = [Extent8].[SupplierID]) AS [UnionAll2]
)  AS [Project5]
ORDER BY [Project5].[ID] ASC, [Project5].[C25] ASC, [Project5].[C2] ASC, [Project5].[C3] ASC, [Project5].[C5] ASC, [Project5].[C1] ASC

使用People填充供应商，但不填写TelephoneNumbers，EmailAddresses或WebResources。

在SQL Management Studio中执行时，我得到了不完整的记录集：

screenshot of SQL result

显然，由于我对其功能的误解，.Include（）无效。

我真的希望避免单独调用People模式。我怎样才能生成有用的SQL？

实体框架：多对多.Include（）不起作用

0 个答案: