ReferentialConstraint中的依赖属性映射到存储生成的列.专栏:'FeeID'

Question

我收到错误:

{"ReferentialConstraint中的依赖属性映射到存储生成的列.列:'FeeID'."}

设置:我手动创建了数据库(SQL Server 2012和SSMS)

我没有edmx文件

我有两个类,FeeMetaData并且Fee,其映射到两个表中的数据库(PFD.FeeMetaData和PFD.Fees)

数据库结构

FeeMetadata
------------ 
FeeID  BIGINT  IDENTITY(1,1) PRIMARY KEY 
Something VARCHAR(25) NOT NULL

Fees
------------ 
FeeID  BIGINT  PRIMARY KEY NOT NULL
FeeBatchID  BIGINT NOT NULL
PersonID BIGINT 
Amount DECIMAL(18,2) NOT NULL
DueDate DATE NOT NULL

FeeMetadata.FeeID和Fees.FeeID之间存在一对一的关系

阶级结构

Imports System.ComponentModel.DataAnnotations
Imports System.ComponentModel.DataAnnotations.Schema
Namespace PFD
    <Table("FeeMetadata", Schema:="PFD")>
    Public Class FeeMetadata

        Public Sub New()
            MyBase.New()
        End Sub

        Public Sub New(ByVal tFee As SOACourt_v1)
            Me.New()
            Me.PfdFee = New PFD.Fee(tFee)
        End Sub

        <Key>
        <DatabaseGenerated(DatabaseGeneratedOption.Identity)>
        Public Property FeeID As Int64

        Public Property Something As String

        <ForeignKey("FeeID")>
        Public Property PfdFee As PFD.Fee
    End Class
End Namespace





Namespace PFD
<Table("Fees", Schema:="PFD")>
Public Class Fee
    Public Sub New()
        MyBase.New()
    End Sub

    Public Sub New(ByVal tFee As SOACourt_v1)
        Me.New()
        Me.Amount = tFee.Amount
        Me.DueDate = tFee.DueDate
    End Sub


    <DatabaseGenerated(DatabaseGeneratedOption.None)>
    Public Property FeeID As Int64

    Public Property FeeBatchID As Int64 = 0

    Public Property PersonID As Int64? = 0

    Public Property Amount As Decimal

    Public Property DueDate As Date = Date.Today
End Class
End Namespace

用法

Using tContext As FeesContext = New FeesContext
    For Each tFee As SOACourt_v1 In tFees
        tContext.FeeMetadata.Add(New PFD.FeeMetadata(tFee))
    Next
    tContext.SaveChanges()     '  <---- Error occurs here
End Using

关于导致错误的原因的任何想法:

{"ReferentialConstraint中的依赖属性映射到存储生成的列.列:'FeeID'."}

Answer 1

虽然我还没有使用EF代码优先,但如果在模型图中错误地设置实体关系,这看起来就像是同样的错误.特别是,在我看来,你的外键设置为向后.

该错误是因为您告诉Entity Framework将该FeeId字段用作FeeMetaData和之间的外键Fee,但该字段是在FeeMetaData类中自动生成的.这几乎肯定不是你打算做的.

如果Fee是主表并且FeeMetaData具有外键,那么您应该将标识字段放入Fee.如果表是相反的,那么你的类是向后的,你应该定义Fee为具有作为外键的FeeMetaData属性FeeId.