应用框架: ASPNET Core 2.1

public class Employee
{
    [DataMember(Name = "key")]
    [Key]
    public Guid Key { get; set; }
    [Required]
    [DataMember(Name = "Name")]
    public string Name { get; set; }
}

Guid 柱

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        //Auto generation of Guid
        modelBuilder.Entity<Employee>().Property(x => x.Key).HasDefaultValueSql("NEWID()");

        //seeding of data
        modelBuilder.Entity<Employee>().HasData(
            new Employee{ Name = "Hamlet" },
            new Employee{ Name = "King Lear" },
            new Employee{ Name = "Othello" }
        );
    }

在运行 add-migration InitialCreate 命令

无法添加实体类型“Employee”的种子实体,因为没有为所需属性“Key”提供值。

Key

update-database