当我在EF6中使用.Include语法时，始终会加载反向导航属性。有没有办法把它关掉？这是一个示例查询。
private static IQueryable<Account> GetAccountsEager(this IRepository<Account> repository)
{
return repository
.Queryable()
.Include(e => e.AccountLocations
.Select(l => l.Address.City.State.Country));
}
这为我提供了帐户的AccountLocations集合。但是，地址＆＃39; city上有这个反向导航属性：
public virtual ICollection<Address> Addresses { get; set; }
..因此它反向加载所有反向导航地址，以便为我提供比查询中要多得多的数据。我可以以某种方式关闭反向导航吗？
我只是从实体中删除反向导航属性，但在其他情况下，我实际上想要向后看以从城市获取地址。
感谢。
编辑1：
我刚才注意到一些奇怪的东西。这不会加载城市的反向导航地址：
return repository.Queryable()
.Include(e => e.BillToAddress.AddressType)
.Include(e => e.BillToAddress.City.State.Country);
但是，如果我添加这样的包含：
return repository.Queryable()
.Include(e => e.BillToAddress.AddressType)
.Include(e => e.BillToAddress.City.State.Country);
.Include(e => e.AccountLocations.Select(a => a.Address.City.State.Country));
然后为e.BillToAddress.City和每个AccountLocation的Address.City加载反向导航地址。为什么在第三个上添加.Select包括影响第二个包含？
exec sp_executesql N'SELECT
//removing [ProjectX].[Property] AS [Property] for brevity
//essentially a line for each property of the syntax above...
FROM ( SELECT
[Limit1].[AccountId] AS [AccountId],
[Limit1].[AccountNumber] AS [AccountNumber],
[Limit1].[Name] AS [Name],
[Limit1].[Attention] AS [Attention],
[Limit1].[BillToAddressId] AS [BillToAddressId],
[Limit1].[NickName] AS [NickName],
[Limit1].[MainPhoneNumber] AS [MainPhoneNumber],
[Limit1].[MainFaxNumber] AS [MainFaxNumber],
[Limit1].[SalesFaxNumber] AS [SalesFaxNumber],
[Limit1].[AccountClassId] AS [AccountClassId],
[Limit1].[DefaultDiscountPercent] AS [DefaultDiscountPercent],
[Limit1].[DefaultCommissionPercent] AS [DefaultCommissionPercent],
[Limit1].[PaymentTermId] AS [PaymentTermId],
[Limit1].[StatementInd] AS [StatementInd],
[Limit1].[CarrierId] AS [CarrierId],
[Limit1].[TransportationTermId] AS [TransportationTermId],
[Limit1].[AccountExecUserId] AS [AccountExecUserId],
[Limit1].[Latitude] AS [Latitude],
[Limit1].[Longitude] AS [Longitude],
[Limit1].[ServCentContractStartDate] AS [ServCentContractStartDate],
[Limit1].[ServCentDiscountPercent] AS [ServCentDiscountPercent],
[Limit1].[MastDistContractStartDate] AS [MastDistContractStartDate],
[Limit1].[MastDistDiscountPercent] AS [MastDistDiscountPercent],
[Limit1].[MastDistDiscountDays] AS [MastDistDiscountDays],
[Limit1].[MastDistLyDiscountPercent] AS [MastDistLyDiscountPercent],
[Limit1].[AccountStartDate] AS [AccountStartDate],
[Limit1].[Website] AS [Website],
[Limit1].[InvoiceAttention] AS [InvoiceAttention],
[Limit1].[PromptPayPercent] AS [PromptPayPercent],
[Limit1].[PromptPayDays] AS [PromptPayDays],
[Limit1].[Ranking] AS [Ranking],
[Limit1].[OrderDiscountInd] AS [OrderDiscountInd],
[Limit1].[PromptPayInd] AS [PromptPayInd],
[Limit1].[SalesRepAccountBypassInd] AS [SalesRepAccountBypassInd],
[Limit1].[StatusReviewBypassInd] AS [StatusReviewBypassInd],
[Limit1].[CheckCreditLimitInd] AS [CheckCreditLimitInd],
[Limit1].[CantrolInd] AS [CantrolInd],
[Limit1].[PrintInvoiceInd] AS [PrintInvoiceInd],
[Limit1].[PrintStatementInd] AS [PrintStatementInd],
[Limit1].[PromptOrderAckInd] AS [PromptOrderAckInd],
[Limit1].[AdminFeeBypassInd] AS [AdminFeeBypassInd],
[Limit1].[InsertDatetime] AS [InsertDatetime],
[Limit1].[InsertSystemUserId] AS [InsertSystemUserId],
[Limit1].[UpdateDatetime] AS [UpdateDatetime],
[Limit1].[UpdateSystemUserId] AS [UpdateSystemUserId],
[Limit1].[AccountCreditId] AS [AccountCreditId],
[Limit1].[AccountGeographicClassId] AS [AccountGeographicClassId],
[Limit1].[AccountProductClassId] AS [AccountProductClassId],
[Limit1].[SalesTeamId] AS [SalesTeamId],
[Limit1].[AddressId] AS [AddressId],
[Limit1].[Address1] AS [Address1],
[Limit1].[Address2] AS [Address2],
[Limit1].[Address3] AS [Address3],
[Limit1].[AddressTypeId] AS [AddressTypeId],
[Limit1].[PostalCodeId] AS [PostalCodeId],
[Limit1].[CityId] AS [CityId],
[Limit1].[InsertDatetime1] AS [InsertDatetime1],
[Limit1].[InsertSystemUserId1] AS [InsertSystemUserId1],
[Limit1].[UpdateDatetime1] AS [UpdateDatetime1],
[Limit1].[UpdateSystemUserId1] AS [UpdateSystemUserId1],
[Limit1].[AddressTypeId1] AS [AddressTypeId1],
[Limit1].[AddressTypeCode] AS [AddressTypeCode],
[Limit1].[AddressTypeDesc] AS [AddressTypeDesc],
[Limit1].[InsertDatetime2] AS [InsertDatetime2],
[Limit1].[InsertSystemUserId2] AS [InsertSystemUserId2],
[Limit1].[UpdateDatetime2] AS [UpdateDatetime2],
[Limit1].[UpdateSystemUserId2] AS [UpdateSystemUserId2],
[Limit1].[AddressSubTypeId] AS [AddressSubTypeId],
[Limit1].[CityId1] AS [CityId1],
[Limit1].[CityName] AS [CityName],
[Limit1].[StateId] AS [StateId],
[Limit1].[InsertDatetime3] AS [InsertDatetime3],
[Limit1].[InsertSystemUserId3] AS [InsertSystemUserId3],
[Limit1].[UpdateDatetime3] AS [UpdateDatetime3],
[Limit1].[UpdateSystemUserId3] AS [UpdateSystemUserId3],
[Limit1].[CountyId] AS [CountyId],
[Limit1].[StateId1] AS [StateId1],
[Limit1].[StateCode] AS [StateCode],
[Limit1].[StateName] AS [StateName],
[Limit1].[CountryId] AS [CountryId],
[Limit1].[InsertDatetime4] AS [InsertDatetime4],
[Limit1].[InsertSystemUserId4] AS [InsertSystemUserId4],
[Limit1].[UpdateDatetime4] AS [UpdateDatetime4],
[Limit1].[UpdateSystemUserId4] AS [UpdateSystemUserId4],
[Limit1].[CountryId1] AS [CountryId1],
[Limit1].[CountryCode] AS [CountryCode],
[Limit1].[CountryName] AS [CountryName],
[Limit1].[InsertDatetime5] AS [InsertDatetime5],
[Limit1].[InsertSystemUserId5] AS [InsertSystemUserId5],
[Limit1].[UpdateDatetime5] AS [UpdateDatetime5],
[Limit1].[UpdateSystemUserId5] AS [UpdateSystemUserId5],
[Join9].[AccountLocationId] AS [AccountLocationId],
[Join9].[AccountId] AS [AccountId1],
[Join9].[AddressId1] AS [AddressId1],
[Join9].[ShipToNumber] AS [ShipToNumber],
[Join9].[AccountLocationName] AS [AccountLocationName],
[Join9].[Attention] AS [Attention1],
[Join9].[ContactId] AS [ContactId],
[Join9].[PhoneNumber] AS [PhoneNumber],
[Join9].[FaxNumber] AS [FaxNumber],
[Join9].[BranchOfficeFlag] AS [BranchOfficeFlag],
[Join9].[UPSAccountNumber] AS [UPSAccountNumber],
[Join9].[InsertDatetime1] AS [InsertDatetime6],
[Join9].[InsertSystemUserId1] AS [InsertSystemUserId6],
[Join9].[UpdateDatetime1] AS [UpdateDatetime6],
[Join9].[UpdateSystemUserId1] AS [UpdateSystemUserId6],
[Join9].[AddressId2] AS [AddressId2],
[Join9].[Address1] AS [Address11],
[Join9].[Address2] AS [Address21],
[Join9].[Address3] AS [Address31],
[Join9].[AddressTypeId] AS [AddressTypeId2],
[Join9].[PostalCodeId] AS [PostalCodeId1],
[Join9].[CityId1] AS [CityId2],
[Join9].[InsertDatetime2] AS [InsertDatetime7],
[Join9].[InsertSystemUserId2] AS [InsertSystemUserId7],
[Join9].[UpdateDatetime2] AS [UpdateDatetime7],
[Join9].[UpdateSystemUserId2] AS [UpdateSystemUserId7],
[Join9].[CityId2] AS [CityId3],
[Join9].[CityName] AS [CityName1],
[Join9].[StateId1] AS [StateId2],
[Join9].[InsertDatetime3] AS [InsertDatetime8],
[Join9].[InsertSystemUserId3] AS [InsertSystemUserId8],
[Join9].[UpdateDatetime3] AS [UpdateDatetime8],
[Join9].[UpdateSystemUserId3] AS [UpdateSystemUserId8],
[Join9].[CountyId] AS [CountyId1],
[Join9].[StateId2] AS [StateId3],
[Join9].[StateCode] AS [StateCode1],
[Join9].[StateName] AS [StateName1],
[Join9].[CountryId1] AS [CountryId2],
[Join9].[InsertDatetime4] AS [InsertDatetime9],
[Join9].[InsertSystemUserId4] AS [InsertSystemUserId9],
[Join9].[UpdateDatetime4] AS [UpdateDatetime9],
[Join9].[UpdateSystemUserId4] AS [UpdateSystemUserId9],
[Join9].[CountryId2] AS [CountryId3],
[Join9].[CountryCode] AS [CountryCode1],
[Join9].[CountryName] AS [CountryName1],
[Join9].[InsertDatetime5] AS [InsertDatetime10],
[Join9].[InsertSystemUserId5] AS [InsertSystemUserId10],
[Join9].[UpdateDatetime5] AS [UpdateDatetime10],
[Join9].[UpdateSystemUserId5] AS [UpdateSystemUserId10],
CASE WHEN ([Join9].[AccountLocationId] IS NULL) THEN CAST(NULL AS int) ELSE 1 END AS [C1]
FROM (SELECT TOP (1)
[Extent1].[AccountId] AS [AccountId],
[Extent1].[AccountNumber] AS [AccountNumber],
[Extent1].[Name] AS [Name],
[Extent1].[Attention] AS [Attention],
[Extent1].[BillToAddressId] AS [BillToAddressId],
[Extent1].[NickName] AS [NickName],
[Extent1].[MainPhoneNumber] AS [MainPhoneNumber],
[Extent1].[MainFaxNumber] AS [MainFaxNumber],
[Extent1].[SalesFaxNumber] AS [SalesFaxNumber],
[Extent1].[AccountClassId] AS [AccountClassId],
[Extent1].[DefaultDiscountPercent] AS [DefaultDiscountPercent],
[Extent1].[DefaultCommissionPercent] AS [DefaultCommissionPercent],
[Extent1].[PaymentTermId] AS [PaymentTermId],
[Extent1].[StatementInd] AS [StatementInd],
[Extent1].[CarrierId] AS [CarrierId],
[Extent1].[TransportationTermId] AS [TransportationTermId],
[Extent1].[AccountExecUserId] AS [AccountExecUserId],
[Extent1].[Latitude] AS [Latitude],
[Extent1].[Longitude] AS [Longitude],
[Extent1].[ServCentContractStartDate] AS [ServCentContractStartDate],
[Extent1].[ServCentDiscountPercent] AS [ServCentDiscountPercent],
[Extent1].[MastDistContractStartDate] AS [MastDistContractStartDate],
[Extent1].[MastDistDiscountPercent] AS [MastDistDiscountPercent],
[Extent1].[MastDistDiscountDays] AS [MastDistDiscountDays],
[Extent1].[MastDistLyDiscountPercent] AS [MastDistLyDiscountPercent],
[Extent1].[AccountStartDate] AS [AccountStartDate],
[Extent1].[Website] AS [Website],
[Extent1].[InvoiceAttention] AS [InvoiceAttention],
[Extent1].[PromptPayPercent] AS [PromptPayPercent],
[Extent1].[PromptPayDays] AS [PromptPayDays],
[Extent1].[Ranking] AS [Ranking],
[Extent1].[OrderDiscountInd] AS [OrderDiscountInd],
[Extent1].[PromptPayInd] AS [PromptPayInd],
[Extent1].[SalesRepAccountBypassInd] AS [SalesRepAccountBypassInd],
[Extent1].[StatusReviewBypassInd] AS [StatusReviewBypassInd],
[Extent1].[CheckCreditLimitInd] AS [CheckCreditLimitInd],
[Extent1].[CantrolInd] AS [CantrolInd],
[Extent1].[PrintInvoiceInd] AS [PrintInvoiceInd],
[Extent1].[PrintStatementInd] AS [PrintStatementInd],
[Extent1].[PromptOrderAckInd] AS [PromptOrderAckInd],
[Extent1].[AdminFeeBypassInd] AS [AdminFeeBypassInd],
[Extent1].[InsertDatetime] AS [InsertDatetime],
[Extent1].[InsertSystemUserId] AS [InsertSystemUserId],
[Extent1].[UpdateDatetime] AS [UpdateDatetime],
[Extent1].[UpdateSystemUserId] AS [UpdateSystemUserId],
[Extent1].[AccountCreditId] AS [AccountCreditId],
[Extent1].[AccountGeographicClassId] AS [AccountGeographicClassId],
[Extent1].[AccountProductClassId] AS [AccountProductClassId],
[Extent1].[SalesTeamId] AS [SalesTeamId],
[Extent2].[AddressId] AS [AddressId],
[Extent2].[Address1] AS [Address1],
[Extent2].[Address2] AS [Address2],
[Extent2].[Address3] AS [Address3],
[Extent2].[AddressTypeId] AS [AddressTypeId],
[Extent2].[PostalCodeId] AS [PostalCodeId],
[Extent2].[CityId] AS [CityId],
[Extent2].[InsertDatetime] AS [InsertDatetime1],
[Extent2].[InsertSystemUserId] AS [InsertSystemUserId1],
[Extent2].[UpdateDatetime] AS [UpdateDatetime1],
[Extent2].[UpdateSystemUserId] AS [UpdateSystemUserId1],
[Extent3].[AddressTypeId] AS [AddressTypeId1],
[Extent3].[AddressTypeCode] AS [AddressTypeCode],
[Extent3].[AddressTypeDesc] AS [AddressTypeDesc],
[Extent3].[InsertDatetime] AS [InsertDatetime2],
[Extent3].[InsertSystemUserId] AS [InsertSystemUserId2],
[Extent3].[UpdateDatetime] AS [UpdateDatetime2],
[Extent3].[UpdateSystemUserId] AS [UpdateSystemUserId2],
[Extent3].[AddressSubTypeId] AS [AddressSubTypeId],
[Extent4].[CityId] AS [CityId1],
[Extent4].[CityName] AS [CityName],
[Extent4].[StateId] AS [StateId],
[Extent4].[InsertDatetime] AS [InsertDatetime3],
[Extent4].[InsertSystemUserId] AS [InsertSystemUserId3],
[Extent4].[UpdateDatetime] AS [UpdateDatetime3],
[Extent4].[UpdateSystemUserId] AS [UpdateSystemUserId3],
[Extent4].[CountyId] AS [CountyId],
[Extent5].[StateId] AS [StateId1],
[Extent5].[StateCode] AS [StateCode],
[Extent5].[StateName] AS [StateName],
[Extent5].[CountryId] AS [CountryId],
[Extent5].[InsertDatetime] AS [InsertDatetime4],
[Extent5].[InsertSystemUserId] AS [InsertSystemUserId4],
[Extent5].[UpdateDatetime] AS [UpdateDatetime4],
[Extent5].[UpdateSystemUserId] AS [UpdateSystemUserId4],
[Extent6].[CountryId] AS [CountryId1],
[Extent6].[CountryCode] AS [CountryCode],
[Extent6].[CountryName] AS [CountryName],
[Extent6].[InsertDatetime] AS [InsertDatetime5],
[Extent6].[InsertSystemUserId] AS [InsertSystemUserId5],
[Extent6].[UpdateDatetime] AS [UpdateDatetime5],
[Extent6].[UpdateSystemUserId] AS [UpdateSystemUserId5]
FROM [dbo].[Account] AS [Extent1]
INNER JOIN [Common].[Address] AS [Extent2] ON [Extent1].[BillToAddressId] = [Extent2].[AddressId]
INNER JOIN [Common].[AddressType] AS [Extent3] ON [Extent2].[AddressTypeId] = [Extent3].[AddressTypeId]
INNER JOIN [Common].[City] AS [Extent4] ON [Extent2].[CityId] = [Extent4].[CityId]
INNER JOIN [Common].[State] AS [Extent5] ON [Extent4].[StateId] = [Extent5].[StateId]
INNER JOIN [Common].[Country] AS [Extent6] ON [Extent5].[CountryId] = [Extent6].[CountryId]
WHERE [Extent1].[AccountId] = @p__linq__0 ) AS [Limit1]
LEFT OUTER JOIN (SELECT [Extent7].[AccountLocationId] AS [AccountLocationId], [Extent7].[AccountId] AS [AccountId], [Extent7].[AddressId] AS [AddressId1], [Extent7].[ShipToNumber] AS [ShipToNumber], [Extent7].[AccountLocationName] AS [AccountLocationName], [Extent7].[Attention] AS [Attention], [Extent7].[ContactId] AS [ContactId], [Extent7].[PhoneNumber] AS [PhoneNumber], [Extent7].[FaxNumber] AS [FaxNumber], [Extent7].[BranchOfficeFlag] AS [BranchOfficeFlag], [Extent7].[UPSAccountNumber] AS [UPSAccountNumber], [Extent7].[InsertDatetime] AS [InsertDatetime1], [Extent7].[InsertSystemUserId] AS [InsertSystemUserId1], [Extent7].[UpdateDatetime] AS [UpdateDatetime1], [Extent7].[UpdateSystemUserId] AS [UpdateSystemUserId1], [Extent8].[AddressId] AS [AddressId2], [Extent8].[Address1] AS [Address1], [Extent8].[Address2] AS [Address2], [Extent8].[Address3] AS [Address3], [Extent8].[AddressTypeId] AS [AddressTypeId], [Extent8].[PostalCodeId] AS [PostalCodeId], [Extent8].[CityId] AS [CityId1], [Extent8].[InsertDatetime] AS [InsertDatetime2], [Extent8].[InsertSystemUserId] AS [InsertSystemUserId2], [Extent8].[UpdateDatetime] AS [UpdateDatetime2], [Extent8].[UpdateSystemUserId] AS [UpdateSystemUserId2], [Extent9].[CityId] AS [CityId2], [Extent9].[CityName] AS [CityName], [Extent9].[StateId] AS [StateId1], [Extent9].[InsertDatetime] AS [InsertDatetime3], [Extent9].[InsertSystemUserId] AS [InsertSystemUserId3], [Extent9].[UpdateDatetime] AS [UpdateDatetime3], [Extent9].[UpdateSystemUserId] AS [UpdateSystemUserId3], [Extent9].[CountyId] AS [CountyId], [Extent10].[StateId] AS [StateId2], [Extent10].[StateCode] AS [StateCode], [Extent10].[StateName] AS [StateName], [Extent10].[CountryId] AS [CountryId1], [Extent10].[InsertDatetime] AS [InsertDatetime4], [Extent10].[InsertSystemUserId] AS [InsertSystemUserId4], [Extent10].[UpdateDatetime] AS [UpdateDatetime4], [Extent10].[UpdateSystemUserId] AS [UpdateSystemUserId4], [Extent11].[CountryId] AS [CountryId2], [Extent11].[CountryCode] AS [CountryCode], [Extent11].[CountryName] AS [CountryName], [Extent11].[InsertDatetime] AS [InsertDatetime5], [Extent11].[InsertSystemUserId] AS [InsertSystemUserId5], [Extent11].[UpdateDatetime] AS [UpdateDatetime5], [Extent11].[UpdateSystemUserId] AS [UpdateSystemUserId5]
FROM [dbo].[AccountLocation] AS [Extent7]
INNER JOIN [Common].[Address] AS [Extent8] ON [Extent7].[AddressId] = [Extent8].[AddressId]
INNER JOIN [Common].[City] AS [Extent9] ON [Extent8].[CityId] = [Extent9].[CityId]
INNER JOIN [Common].[State] AS [Extent10] ON [Extent9].[StateId] = [Extent10].[StateId]
INNER JOIN [Common].[Country] AS [Extent11] ON [Extent10].[CountryId] = [Extent11].[CountryId] ) AS [Join9] ON [Limit1].[AccountId] = [Join9].[AccountId]
) AS [Project2]
ORDER BY [Project2].[AccountId] ASC, [Project2].[AddressId] ASC, [Project2].[AddressTypeId1] ASC, [Project2].[CityId1] ASC, [Project2].[StateId1] ASC, [Project2].[CountryId1] ASC, [Project2].[C1] ASC',N'@p__linq__0 int',@p__linq__0=21067
这是DbContextConfiguration：
public DataContext(string nameOrConnectionString)
: base(nameOrConnectionString)
{
_instanceId = Guid.NewGuid();
Configuration.LazyLoadingEnabled = false;
Configuration.ProxyCreationEnabled = false;
}
以下是执行查询的方法（使用.FirstOrDefault（））：
public static Account GetEager(
this IRepository<Account> repository,
int id)
{
var query = repository.GetQueryableEager();
return query.FirstOrDefault(e => e.AccountId == id);
}
这是一个城市：
public partial class City: Entity, IDatabaseMetaData
{
public int CityId { get; set; } // CityId (Primary key)
public string CityName { get; set; } // CityName
public int StateId { get; set; } // StateId
public DateTime InsertDatetime { get; set; } // InsertDatetime
public int InsertSystemUserId { get; set; } // InsertSystemUserId
public DateTime? UpdateDatetime { get; set; } // UpdateDatetime
public int? UpdateSystemUserId { get; set; } // UpdateSystemUserId
public int? CountyId { get; set; } // CountyId
// Reverse navigation
public virtual ICollection<Address> Addresses { get; set; } // Address.FK_Address_CityId
// Foreign keys
public virtual County County { get; set; } // FK_City_CountyId
public virtual State State { get; set; } // FK_City_StateId
public City()
{
InsertDatetime = System.DateTime.Now;
Addresses = new List<Address>();
InitializePartial();
}
partial void InitializePartial();
}
答案 0 :(得分：4)
我认为你所看到的是“关系修复”的结果：
关系修复可确保在第二个实体进入ObjectContext时自动链接相关对象。
http://blogs.msdn.com/b/alexj/archive/2009/10/13/tip-37-how-to-do-a-conditional-include.aspx
在您的情况下，由于您包含AccountLocation.Address.City，因此EF会加载相关的Address实体以及您请求的相关City个实体，并且作为“修复 - 的一部分 - “它正在添加加载的Address实体，这些实体将成为City - ＆gt; Address与City.Addresses导航集合的一对多关系的一部分。
您可以在this link找到另一个示例。在您的情况下，延迟加载和代理创建也被禁用 - 但是，该链接不包括禁用此行为的方法。
答案 1 :(得分：2)
在预先加载时，您可以在EF中排除反向导航属性吗？
没有
正如另一个答案中所解释的那样，EF具有 relationship fixup 的这个过程，它将已加载到上下文中的所有实体编织在一起。你不能以任何方式阻止这个过程。因此，如果你不自己拿东西，你总会得到这个膨胀的Json字符串。 （我无法解释或重现你似乎找到的急切加载差异，但这些应该成为一个新问题的主题。我不会计算对它们总是发生，希望它们会解决你当前的问题）。
所以这就是关键：控制。这取决于你的情况什么是最好的策略，但有一些选择。
将查询投影为匿名类型并将其序列化为JSON。只是一个最小的例子：
repository.Queryable()
.Select(e => new
{
Account = e.Name,
AccountLocations =
e.AccountLocations
.Select(l => new
{
Address = new { l.Address.Street, l.Address.Number },
City = l.Address.City.Name,
Country = l.Address.City.Country.Name,
})
});
有些人会对从方法中返回匿名类型感到沮丧，即使它是在JSON中，但对我而言，它只是一种以某种所需格式返回JSON的方法。它只会使无类型的JavaScript世界更近一步。
对命名类型的结构（DTO或视图模型，类型）执行相同的操作。
创建没有双向关联的专用上下文。这是一个经常被遗忘的选项，但为什么总是有一个上下文来访问您的数据？仅确保上下文使用的类（或由上下文生成的类）具有与属于主上下文的类不同的名称。
顺便说一句，通过这样做，您还可以定制从数据库中获取的数据量，以便您序列化所需的数据。