实体框架不更新mySql中计算密钥的自动增量字段

我试图使用entityframework保存一个实体，尽管EF没有更新自动增量字段

public class Address
{
    public int Id { get; set; }
    public int DatacenterId { get; set; }
    public virtual Datacenter Datacenter { get; set; }
}

public class AddressMapping : EntityTypeConfiguration<Address>
{
    public AddressMapping()
    {
        this.HasKey(k => new { k.Id, k.DatacenterId });
        this.HasRequired(itr => itr.Datacenter)
            .WithMany()
            .HasForeignKey(fk => fk.DatacenterId);

        this.Property(p => p.Id)
            .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
    }
}

using (var context = new MyContext())
{
    var address = new Address(); //Initialize and set all values. Include the FK
    context.Address.Add(address);
    context.SaveChanges();

    //address.Id is still 0
}

---

我已经更改了映射命令的顺序，它正在工作。我不知道EF映射命令可以更改映射结果

public class AddressMapping : EntityTypeConfiguration<Address>
{
    public AddressMapping()
    {
        this.Property(p => p.Id)
            .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);

        this.HasKey(k => new { k.Id, k.DatacenterId });

        this.HasRequired(itr => itr.Datacenter)
            .WithMany()
            .HasForeignKey(fk => fk.DatacenterId);
    }
}

public class AddressMapping : EntityTypeConfiguration<Address>
{
    public AddressMapping()
    {
        this.Property(p => p.Id)
            .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);

        this.HasKey(k => new { k.Id, k.DatacenterId });

        this.HasRequired(itr => itr.Datacenter)
            .WithMany()
            .HasForeignKey(fk => fk.DatacenterId);
    }
}

INSERT INTO `address`(
    `DatacenterId`, 
)VALUES(
    1, 
);
SELECT
    `Id`
FROM 
    `address`
WHERE  
     row_count() > 0 AND `Id` = last_insert_id() AND `DatacenterId` = 1