Question

public class TransactionIdentityModelMapping : ClassMap<TransactionIdentityModel>
{
    public TransactionIdentityModelMapping()
    {
        Table("TransactionIdentities");
        Id(x => x.Id);
        References(x => x.Transaction);
    }
}

public class TransactionModelMapping : ClassMap<TransactionModel>
{
    public TransactionModelMapping()
    {
        Table("Transactions");
        Id(x => x.Id);
        HasMany(x => x.Identities);
    }
}

TransactionIdentityModel.Transaction的类型为TransactionModel。这意味着创建了一个名为"TransactionModel_id"的列。如何更改此列名称？

我试过了：

References(x => x.Transaction).Column("Transaction_id");

和

References(x => x.Transaction).ForeignKey("Transaction_id");

和

References(x => x.Transaction).Column("Transaction_id").ForeignKey("Id").Fetch.Join();

这些都会产生2列，我想要的列（“Transaction_id”）和原始列（“TransactionModel_id”）。

我是否还需要对HasMany？

执行某些操作

修改模型：

public class TransactionModel
{
    /// <summary>
    /// For NHibernate
    /// </summary>
    protected TransactionModel()
    {
    }

    public static TransactionModel FromId(TransactionIdentityModel tranIdentity)
    {      
        return new TransactionModel
            {
                Identities = new List<TransactionIdentityModel> { tranIdentity }
            };
    }

    public virtual Guid Id { get; protected set; }

    public virtual IList<TransactionIdentityModel> Identities { get; protected set; }
}

public class TransactionIdentityModel
{        
    public virtual Guid Id { get; protected set; }

    public virtual TransactionModel TransactionModel { get; set; }
}

产生2列，这是我使用地图时生成的SQL： References(x => x.Transaction).Column("Transaction_id").ForeignKey("Id").Fetch.Join();

alter table TransactionIdentities 
    add constraint Id 
    foreign key (Transaction_id) 
    references Transactions

alter table TransactionIdentities 
    add constraint FK958B77026F5C4B80 
    foreign key (TransactionModel_id) 
    references Transactions

Answer 1

假设Transaction_Id是相关TransactionModel的外键，那么您需要将References语句更改为：

 References(x => x.Transaction).Column("Transaction_id");

这将覆盖该字段的nHibernates默认期望为TransactionModel_id

查看此问题Prevent Nhibernate schemaexport from generating foreign key constraints on has many relationship，我认为您必须将HasMany映射更改为：

 HasMany(x => x.Identities).KeyColumn("Transaction_id")

指定外键列的名称

1 个答案: