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我修改了用户类并在 Visual Studio 2012 的包管理器控制台中创建了数据迁移。数据迁移包括以下脚本：

            CreateTable(
            "dbo.Users",
            c => new
                {
                    Id = c.Int(nullable: false, identity: true),
                    Username = c.String(nullable: false),
                    Comment = c.String(),
                    EmailAddress = c.String(maxLength: 64),
                    Identifier = c.String(),
                    IsApproved = c.Boolean(nullable: false),
                    PasswordFailuresSinceLastSuccess = c.Int(nullable: false),
                    LastPasswordFailureDate = c.DateTime(),
                    LastActivityDate = c.DateTime(),
                    LastLockoutDate = c.DateTime(),
                    LastLoginDate = c.DateTime(),
                    ConfirmationToken = c.String(),
                    CreateDate = c.DateTime(),
                    IsLockedOut = c.Boolean(nullable: false),
                    LastPasswordChangedDate = c.DateTime(),
                    PasswordVerificationToken = c.String(),
                    PasswordVerificationTokenExpirationDate = c.DateTime(),
                    PersonId = c.Int(nullable: false),
                    OwnerId = c.Int(nullable: false),
                    EffectiveDate = c.DateTime(nullable: false),
                    ExpirationDate = c.DateTime(),
                    CreationDate = c.DateTime(nullable: false),
                    UpdatedDate = c.DateTime(nullable: false),
                    Creator = c.String(nullable: false),
                    Updater = c.String(nullable: false),
                    AlertConfiguration_Id = c.Int(),
                })
            .PrimaryKey(t => t.Id)
            .ForeignKey("dbo.People", t => t.PersonId, cascadeDelete: false)
            .ForeignKey("dbo.AlertConfigurations", t => t.AlertConfiguration_Id)
            .Index(t => t.PersonId)
            .Index(t => t.AlertConfiguration_Id);

运行迁移后，在数据库中成功创建了 User 表，并显示了所有列。但是，对数据库的后续查询会生成以下错误：

Exception Details: System.Data.SqlClient.SqlException: Invalid column name 'OwnerId'.
Invalid column name 'EffectiveDate'.
Invalid column name 'ExpirationDate'.
Invalid column name 'CreationDate'.
Invalid column name 'UpdatedDate'.
Invalid column name 'Creator'.
Invalid column name 'Updater'.

用户类继承自 AuditableClass，其定义如下：

public abstract class AuditableClass
    {
        public AuditableClass()
        {
            this.CreationDate = System.DateTime.Now;
        }

        [ScaffoldColumn(false)]
        public int Id { get; set; }

        [Required(ErrorMessage = "An owner ID is required")]
        [ScaffoldColumn(false)]
        public int OwnerId { get; set; }

        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        [Display(Name = "Effective Date")]
        [Required(ErrorMessage = "An effective date is required")]
        [DataType(DataType.Date)]
        public DateTime? EffectiveDate { get; set; }

        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        [Display(Name = "Expiration Date")]
        [DataType(DataType.Date)]
        public DateTime? ExpirationDate { get; set; }

        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        [Required(ErrorMessage = "An creation date is required")]
        [ScaffoldColumn(false)]
        public DateTime? CreationDate { get; set; }

        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        [Required(ErrorMessage = "A last update date is required")]
        [ScaffoldColumn(false)]
        public DateTime? UpdatedDate { get; set; }

        [Required(ErrorMessage = "An creator is required")]
        [ScaffoldColumn(false)]
        public string Creator { get; set; }

        [Required(ErrorMessage = "A last updater is required")]
        [ScaffoldColumn(false)]
        public string Updater { get; set; }
    }

这是用户类：

public class User : AuditableClass
    {
        [Required]
        public virtual String Username { get; set; }

        [DataType(DataType.MultilineText)]
        public virtual String Comment { get; set; }

        [Display(Name = "Email Address")]
        [StringLength(64)]
        public string EmailAddress { get; set; }

        public string Identifier { get; set; }
        public Boolean IsApproved { get; set; }
        public int PasswordFailuresSinceLastSuccess { get; set; }
        public DateTime? LastPasswordFailureDate { get; set; }
        public DateTime? LastActivityDate { get; set; }
        public DateTime? LastLockoutDate { get; set; }
        public DateTime? LastLoginDate { get; set; }
        public String ConfirmationToken { get; set; }
        public DateTime? CreateDate { get; set; }
        public Boolean IsLockedOut { get; set; }
        public DateTime? LastPasswordChangedDate { get; set; }
        public String PasswordVerificationToken { get; set; }
        public DateTime? PasswordVerificationTokenExpirationDate { get; set; }
        public virtual List<Role> Roles { get; set; }
        public virtual List<myApp.Models.Parties.Org> AuthorizedOrgs { get; set; }
        public virtual List<myApp.Models.Security.Permission> Permissions { get; set; }

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

System.Data.SqlClient.SqlException 的主题列都继承自 AuditableClass。

如何让实体框架识别继承的列？

4

1 回答 1

0

发现问题了，原来是User对象包含了一个Roles集合，这个集合是在运行时实例化用户的时候动态加载的。与 Role 类对应的 Roles 表最初也是安全模式的一部分，并在移动 Users 表的同时被移动到事务模式中。Roles 表是使用包管理器控制台的自动数据迁移功能创建的。此功能已创建表，但错过了继承的列（角色也继承自 AuditableClass）。

创建数据迁移，然后输入代码手动创建自动迁移遗漏的列解决了这个问题。

这是解决问题的迁移代码：

    public partial class UpdateRoles : DbMigration
{
    public override void Up()
    {
        AddColumn("dbo.Roles", "OwnerId", c => c.Int(nullable: false));
        AddColumn("dbo.Roles", "EffectiveDate", c => c.DateTime(nullable: false));
        AddColumn("dbo.Roles", "ExpirationDate", c => c.DateTime());
        AddColumn("dbo.Roles", "CreationDate", c => c.DateTime(nullable: false));
        AddColumn("dbo.Roles", "UpdatedDate", c => c.DateTime(nullable: false));
        AddColumn("dbo.Roles", "Creator", c => c.String(nullable: false, defaultValue: "myusername"));
        AddColumn("dbo.Roles", "Updater", c => c.String(nullable: false, defaultValue: "myusername"));
    }

    public override void Down()
    {
    }
}
于 2012-12-19T00:19:17.470 回答