entity-framework - 告诉实体框架为此外键使用正确的名称

Question

编辑：我可能应该包括电子邮件、地址和电话实体：

Public Class AddressEntity
    Inherits AddressComplexEntity

    <IgnoreForCompare()>
    Public Property AddressId() As Guid

    Public Sub New()
        AddressId = Guid.NewGuid()
    End Sub
End Class

Public Class AddressComplexEntity
    Inherits BaseEntity(Of AddressComplexEntity)
    Public Property Street() As String
    Public Property Suite() As String
    Public Property City() As String
    Public Property State() As String
    <MaxStringLength(10)> _
    Public Property ZipCode() As String
    Public Property Country() As String
End Class

Public Class PhoneEntity
    Inherits BaseEntity(Of PhoneEntity)

    Public Sub New()
        _PhoneId = Guid.NewGuid
    End Sub

    Public Property PhoneTypeId() As Integer
    Public Property PhoneType() As PhoneType
    Public Property AreaCode() As Integer
    Public Property Prefix() As Integer
    Public Property LineNumber() As Integer
    Public Property PhoneId() As Guid
End Class

Public Class EmailEntity
    Inherits BaseEntity(Of EmailEntity)

    Public Sub New()
        EmailId = Guid.NewGuid
    End Sub

    Public Sub New(ByVal Email As String)
        Me.New()
        Me.Email = Email
    End Sub

    Public Property EmailId As Guid
    Public Property PersonId As Guid
    Public Property Person As PersonEntity
    Public Property Email As String
End Class

我有以下表格：

CREATE TABLE [dbo].[Person](
    [PersonId] [uniqueidentifier] NOT NULL,
    [FirstName] [nvarchar](255) NULL,
    [MiddleName] [nvarchar](255) NULL,
    [LastName] [nvarchar](255) NULL,
    [DateOfBirth] [datetime] NULL,
    [DateOfBirthIsGuess] [bit] NULL,
    [NickName] [nvarchar](255) NULL,
    [Suffix] [nchar](10) NULL,
    [Gender] [char](1) NULL,
        [SSN] [numeric](9, 0) NULL,
 CONSTRAINT [PK__Person__04E4BC85] PRIMARY KEY CLUSTERED 
(
    [PersonId] ASC
)
    )

CREATE TABLE [dbo].[Patient](
    [PatientId] [uniqueidentifier] NOT NULL,
    [CenterNumber] [nvarchar](10) NOT NULL,
    [GuarantorNumber] [nvarchar](10) NOT NULL,
    [DependantNumber] [nvarchar](10) NOT NULL,
    [GuarantorId] [uniqueidentifier] NULL,
    [PatientInsurance] [varchar](50) NULL,
    [PrimaryCarePhysician] [varchar](255) NULL,
    [PatientFirstIsPrimaryCarePhysician] [bit] NOT NULL,
 CONSTRAINT [PK__Patient__47DBAE45] PRIMARY KEY NONCLUSTERED 
(
    [PatientId] ASC
))

CREATE TABLE [dbo].[Guarantor](
    [GuarantorId] [uniqueidentifier] NOT NULL,
    [CenterNumber] [nvarchar](10) NOT NULL,
    [GuarantorNumber] [nvarchar](10) NOT NULL,
    [IndustrialClientNumber] [int] NULL,
    [Employer] [varchar](4000) NULL,
 CONSTRAINT [PK__Guarantor__44FF419A] PRIMARY KEY CLUSTERED 
(
    [GuarantorId] ASC
))

Public Class PersonEntity

    Public Sub New()
        Me.PersonId = Guid.NewGuid
    End Sub

    Public Property PersonId() As Guid

    Public Property Address() As ICollection(Of AddressEntity)
    Public Property Email() As ICollection(Of EmailEntity)
    Public Property Phone() As ICollection(Of PhoneEntity)
    Public Property FirstName() As String
    Public Property MiddleName() As String
    Public Property LastName() As String
    Public Property Suffix() As String
    Public Property DateOfBirth() As Nullable(Of Date)
    Public Property Gender() As Char
    Public Property Ssn() As Nullable(Of Integer)
End Class

Public Class PatientEntity
    Inherits Person.PersonEntity


    Public Property Visits() As IList(Of VisitEntity)

    Public Property GuarantorId() As Guid
    Public Property Guarantor() As GuarantorEntity
    Public Property Center() As CenterEntity
    Public Property DependantNumber() As String
    Public Property PatientInsurance() As String
    Public Property PrimaryCarePhysician() As String
    Public Property PatientFirstIsPrimaryCarePhysician() As Boolean
    Public Property GuarantorNumber() As String

    Public Sub New()
        MyBase.New()
        _Visits = New List(Of VisitEntity)
    End Sub
End Class

Public Class GuarantorEntity
    Inherits Person.PersonEntity

    Public Sub New()
    End Sub

    Public Property CenterNumber() As String
    Public Property GuarantorNumber() As String
    Public Property CenterGuarantorNumber() As String
    Public Property IndustrialClientNumber() As Integer
    Public Property Employer() As String
End Class

这是我的 dbcontext 的设置： public class MyRepository : DbContext { public MyRepository() : this("PatientFirst") {}

    public MyRepository(string connectionNameOrString)
        : base(connectionNameOrString)
    {
        //don't want to create or update the database
        Database.SetInitializer<MyRepository>(null);
    }

    public DbSet<GuarantorEntity> Guarantors { get; set; }
    public DbSet<PersonEntity> People { get; set; }
    public DbSet<PatientEntity> Patients { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Configurations.Add(new VisitEntityConfiguration());
        modelBuilder.Configurations.Add(new PersonEntityConfiguration());
        modelBuilder.Configurations.Add(new GuarantorEntityConfiguration());
        modelBuilder.Configurations.Add(new PatientEntityConfiguration());
        modelBuilder.Configurations.Add(new AddressEntityConfiguration());
        modelBuilder.Configurations.Add(new EmailEntityConfiguration());
        modelBuilder.Configurations.Add(new PhoneEntityConfiguration());
    }
}

public class VisitEntityConfiguration : EntityTypeConfiguration<VisitEntity>
{
    public VisitEntityConfiguration()
    {
        ToTable("vVisit");
        HasKey(v => v.VisitId);
    }
}

public class PersonEntityConfiguration : EntityTypeConfiguration<PersonEntity>
{
    public PersonEntityConfiguration()
    {
        ToTable("vPerson");
        HasKey(p => p.PersonId);

        HasMany(p => p.Address)
            .WithMany()
            .Map(m =>
                     {
                         m.MapLeftKey("PersonId");
                         m.MapRightKey("AddressId");
                         m.ToTable("vPersonAddress");
                     });

        HasMany(p => p.Phone)
            .WithMany()
            .Map(m =>
                     {
                         m.MapLeftKey("PersonId");
                         m.MapRightKey("PhoneId");
                         m.ToTable("vPersonPhone");
                     });

        HasMany(p => p.Email)
            .WithRequired()
            .HasForeignKey(e => e.PersonId);
    }
}

public class PatientEntityConfiguration : EntityTypeConfiguration<PatientEntity>
{
    public PatientEntityConfiguration()
    {
        ToTable("vPatient");
        HasKey(p => p.PersonId);
        Ignore(p => p.Guarantor);
        Ignore(p => p.Center);
        //HasOptional(p => p.Guarantor);
    }
}

public class GuarantorEntityConfiguration : EntityTypeConfiguration<GuarantorEntity>
{
    public GuarantorEntityConfiguration()
    {
        ToTable("vGuarantor");
        HasKey(g => g.PersonId);
        Ignore(g=>g.CenterGuarantorNumber);
    }
}

public class AddressEntityConfiguration : EntityTypeConfiguration<AddressEntity>
{
    public AddressEntityConfiguration()
    {
        ToTable("vAddress");
        HasKey(a => a.AddressId);
    }
}

public class EmailEntityConfiguration : EntityTypeConfiguration<EmailEntity>
{
    public EmailEntityConfiguration()
    {
        ToTable("vEmail");
        HasKey(e => e.EmailId);
    }
}

public class PhoneEntityConfiguration : EntityTypeConfiguration<PhoneEntity>
{
    public PhoneEntityConfiguration()
    {
        ToTable("vPhone");
        HasKey(p => p.PhoneId);
        Ignore(p=>p.PhoneType);
    }
}

在我的担保人控制器中，如果我只是对 dbset 进行正常查询，而不包括 Email 属性，我会得到我期望的返回 xml，但是当我在查询中包含 email 属性时，它会给我一个 sql 错误：

public GuarantorEntity GetGuarantorEntity(Guid id)
{
    GuarantorEntity guarantorEntity = db.Guarantors
        .Include(p => p.Address)
        .Include(p => p.Phone)
        .Include(p => p.Email) //If you comment this line out everything works, but of course you don't get email object populated
        .FirstOrDefault(r => r.PersonId == id);
    if (guarantorEntity == null)
    {
        throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotFound));
    }

    return guarantorEntity;
}

这是我得到的错误（减去只是告诉我 SQL 抛出错误的堆栈跟踪）：

<Error><Message>An error has occurred.</Message><ExceptionMessage>Invalid column name 'Person_PersonId'.</ExceptionMessage><ExceptionType>System.Data.SqlClient.SqlException</ExceptionType><StackTrace></StackTrace></Error>

在包含电子邮件的情况下，出于某种原因试图调用 FK 列“Person_PersonId”，为什么它会使用它而不是仅使用“PersonId”，因为它在电子邮件对象上被调用。如何让它为 FK 使用“PersonId”而不是“Person_PersonId”？

score 2 · Accepted Answer

这个映射...

HasMany(p => p.Email)
    .WithRequired()
    .HasForeignKey(e => e.PersonId);

...是不正确的。您必须使用：

HasMany(p => p.Email)
    .WithRequired(e => e.Person)
    .HasForeignKey(e => e.PersonId);

如果您在 Entity Framework 中不提供 inverse 属性，WithRequired则假定导航属性是和Email.Person之间的另一个第二关系的一部分。这就是EF 在查询中使用第二个外键的原因。PersonEmailPerson_PersonId

entity-framework - 告诉实体框架为此外键使用正确的名称

1 回答 1

Related

Reference