如何映射这两个生成的类之间的关系？

Question

我以前用EF Code First From Database生成基于现有数据库的类。我需要映射这两个类之间的关系。我怀疑我必须设置外键，但不要设置外键。

Partial Public Class be_Posts 
    <Key> 
    Public Property PostRowID As Integer 
    Public Property BlogID As Guid 
    Public Property PostID As Guid 
    <StringLength(255)> 
    Public Property Title As String 
    Public Property Description As String 
    Public Property PostContent As String 
    Public Property DateCreated As Date? 
    Public Property DateModified As Date? 
    <StringLength(50)> 
    Public Property Author As String 
    Public Property IsPublished As Boolean? 
    Public Property IsCommentEnabled As Boolean? 
    Public Property Raters As Integer? 
    Public Property Rating As Single? 
    <StringLength(255)> 
    Public Property Slug As String 
    Public Property IsDeleted As Boolean 
End Class 



Partial Public Class be_PostTag 
    <Key> 
    Public Property PostTagID As Integer 
    Public Property BlogID As Guid 
    Public Property PostID As Guid 
    Public Property PostRowID As Integer 
    <StringLength(50)> 
    Public Property Tag As String 
End Class 

Answer 1

看起来很简单，但我可能会错过一些东西。有一段时间没有在VB编码，所以原谅任何错别字。

您需要在两个表的PostRowID值上添加一个外键关系。

我相信你完成后应该看起来像这样。

Partial Public Class be_Posts 
    <Key> 
    Public Property PostRowID As Integer 
    Public Property BlogID As Guid 
    Public Property PostID As Guid 
    <StringLength(255)> 
    Public Property Title As String 
    Public Property Description As String 
    Public Property PostContent As String 
    Public Property DateCreated As Date? 
    Public Property DateModified As Date? 
    <StringLength(50)> 
    Public Property Author As String 
    Public Property IsPublished As Boolean? 
    Public Property IsCommentEnabled As Boolean? 
    Public Property Raters As Integer? 
    Public Property Rating As Single? 
    <StringLength(255)> 
    Public Property Slug As String 
    Public Property IsDeleted As Boolean 
End Class 



Partial Public Class be_PostTag 
    <Key> 
    Public Property PostTagID As Integer 
    Public Property BlogID As Guid 
    Public Property PostID As Guid 
    Public Property PostRowID As Integer 
    <StringLength(50)> 
    Public Property Tag As String 
    <ForeignKey("PostRowID")> 
    Public Property PostRow As be_Posts 
End Class 

下面是引用定义与代码首先这个FK关系的一个简单的例子的文章，该例子是在C＃中，但应该翻译得相当好。