EF Core 2.0.0 一对一或零与 Fluent Api [英] EF Core 2.0.0 One to One-or-Zero with Fluent Api

问题描述

在 EF Core 2.0.0 的 Fluent Api 中，没有任何方法 HasRequired 和 HasOptional，我有两个模型、人员和员工:

 公共类 Person{公共 int Id { 获取；放;}公共 int EmployeeId { 获取；放;}公共虚拟员工员工{获取；放;}//选修的}公开课员工{公共 int Id { 获取；放;}公共 int PersonId { 获取；放;}公共虚拟人人{get;放;}//必需的}

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• Person 可能有员工:Optional
• Employee 应该有 Person:Required

如何在数据库中应用这些约定.

解决方案

你可以只指定 int 吗?作为 EmployeeId 属性类型.

顺便说一句，无需将导航属性设为虚拟.

In Fluent Api at EF Core 2.0.0, there aren't any methods HasRequired and HasOptional, and i have tow Models, Person and Employee:

    public class Person
    {
        public int Id { get; set; }

        public int EmployeeId { get; set; }
        public virtual Employee Employee { get; set; } // Optional
    }

    public class Employee
    {
        public int Id { get; set; }

        public int PersonId { get; set; }
        public virtual Person Person {get; set; } // Required
    }

• Person May to have Employee: Optional
• Employee Should have Person: Required

How to apply these convetions in database.

解决方案

You could just specify int? as EmployeeId property type.

BTW, no need to make navigation properties virtual.

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