使用拥有的实体内部的属性创建关系会导致错误 [英] Create relationship with a property inside owned Entity causes an error

问题描述

我有一个拥有类型的实体，我想与另一个实体建立关系，但是外键属性存在于拥有的类型上，例如：-
这是我的雇员实体

I have an entity that has owned type and i want to create relationship with another entity but the foreign key property exist on the owned type example:- This is my employee entity

public sealed class Employee : AuditedAggregateRoot
{
     public WorkInformation WorkInformation { get; private set; }
}

它包含一个名为WorkInformation的对象（拥有的类型）

and it contains a value Object(Owned Type) called WorkInformation

public class WorkInformation : ValueObject<WorkInformation>
{
    private WorkInformation()
    {

    }
    public int? DepartmentId { get; private set; }
}

我需要在员工和部门之间建立关系

and i need to create relationship between Employee and Department

public class Department : AuditedAggregateRoot
{

}

，我使用以下Fluent配置执行此操作，但出现错误

and I use the following Fluent configuration to do that but i got an error

  builder.OwnsOne(e => e.WorkInformation)  

 //Add Employee Relations
   builder.HasOne<Department>()
   .WithMany()
   .IsRequired(false)
   .HasForeignKey(e => e.WorkInformation.DepartmentId);

我得到这个错误

and i got this error

如果我将DepartmentId移到所有者实体，则可以正常工作。

if i move the DepartmentId to the owner entity, it works fine.

推荐答案

拥有的类型（它们的属性，关系等）无法通​​过拥有者类型构建器进行配置。而是使用 OwnsOne 方法返回的 ReferenceOwnershipBuilder ：

Owned types (their properties, relationships etc.) cannot be configured via the owner type builder. Instead, use the ReferenceOwnershipBuilder returned by the OwnsOne method:

var workInfomationBuilder = builder.OwnsOne(e => e.WorkInformation);

//Add Employee Relations
workInfomationBuilder.HasOne<Department>()
    .WithMany()
    .IsRequired(false)
    .HasForeignKey(e => e.DepartmentId);

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