c# - EF 迁移和时间戳列，无法更新/运行

Question

我在 EF6 中有一个对象，我忘记从我的 auditableEntity 类继承。这个类有这样的配置

public abstract class AuditableEntityConfig<TEntity> : BaseEntityConfig<TEntity> where TEntity : AuditableEntity
{
    public AuditableEntityConfig()
        : base()
    {

        this.Property(e => e.RowVersion)
            .IsRowVersion();

    }
}

现在我已经更新了我的实体以继承自此类，现在在运行我的代码时，我总是会收到一条错误消息

Cannot alter column 'RowVersion' to be data type timestamp.

我是否可以阻止 EF 尝试将此列设置为时间戳，也许我自己删除并重新创建表？

Answer 1

Replace one line AlterColumn with 2 lines DropColumn and AddColumn in Up() method.

        public override void Up()
        {
            DropColumn("dbo.Cities", "RowVersion", null);
            AddColumn("dbo.Cities", "RowVersion", c => c.Binary(nullable: false, fixedLength: true, timestamp: true, storeType: "rowversion"));
        }

        public override void Down()
        {
            AlterColumn("dbo.Cities", "RowVersion", c => c.Binary());
        }