fluent-nhibernate - NHibernate映射异常: An association from the table dbo. AccountGroup引用了未映射的类: System.字符串

Question

我收到此错误:

表dbo.AccountGroup中的关联引用了未映射的类:System.String

这是我的实体:

public class AccountGroup
{
    public virtual int Id { get; private set; }
    public virtual string Name { get; set; }
    public virtual string Parent { get; set; }
    public virtual string Description { get; set; }
    public virtual IList<Account> Accounts { get; set; }

    public AccountGroup()
    {
        this.Accounts = new List<Account>();
    }
}

public class Account
{
    public virtual int Id { get; private set; }
    public virtual string Code { get; set; }
    public virtual string Name { get; set; }
    public virtual string Description { get; set; }
    public virtual int Category { get; set; }
    public virtual AccountGroup Group { get; set; }
    public virtual IList<LedgerEntry> LedgerEntries { get; set; }

    public Account()
    {
        this.LedgerEntries = new List<LedgerEntry>();
    }
}

这是我的映射:

    public AccountGroupMap()
    {
        Table("dbo.AccountGroup");
        Id(x => x.Id)
            .Column("Id");
        Map(x => x.Name);
        References(x => x.Parent)
            .Column("Parent");
        Map(x => x.Description);
        HasMany(x => x.Accounts)
            .KeyColumn("GroupId")
            .Inverse()
            .Cascade.All();
    }
}

    public AccountMap()
    {
        Table("dbo.Account");
        Id(x => x.Id)
            .Column("Id");
        Map(x => x.Code);
        Map(x => x.Name);
        Map(x => x.Description);
        Map(x => x.Category);
        References(x => x.Group)
            .Column("AccountGroupId");
        HasMany(x => x.LedgerEntries)
            .KeyColumn("AccountId")
            .Inverse()
            .Cascade.All();
    }

这是我的 table :

创建表AccountGroup
(
ID int PRIMARY KEY，
名称varchar(20)，
父级int，
说明varchar(20)
)

创建表帐户
(
ID int PRIMARY KEY，
代码varchar(30)，
名称varchar(20)，
说明varchar(20)，
类别int，
AccountGroupId int，
外键(AccountGroupId)引用AccountGroup(Id)
)

Answer 1

你有

References(x => x.Parent)
        .Column("Parent");

当父级定义为

public virtual string Parent { get; set; }

您不能引用字符串(除非它是一个collection元素)