Nhibernate Map by Code Dictionary <string,entity>不将键,值对插入字典</string,entity>

时间:2013-10-16 08:44:02

标签: c# nhibernate dictionary mapping-by-code

我在使用Nhibernate Map By Code映射字典时遇到了一些麻烦。 我想让我的课程多语言。所以为此我创建了一个字典,为每个LanguageCode保存适当的_i18n语言类。

映射似乎有效,但是如果我想获得一个带有语言字典的产品,那么它总是空的,我不知道为什么。

这是我的代码:

public class Product
{
    public virtual String ArticleNumber { get; set; }

    public virtual Dictionary<String, Product_i18n> Languages { get; set; }
}

    public class Product_i18n
{
    public virtual long Id { get; set; }
    public virtual Product Product { get; set; }
    public virtual String LanguageCode { get; set; }

    public virtual String Name { get; set; }
}

以下是映射:

    class ProductMap : ClassMapping<Product>
{
    public ProductMap()
    {
        Lazy(true);
        // Sets Tablename
        Table("Prodcut");

        // primary key
        Id(product => product.ArticleNumber, mapping =>
                                                 {
                                                           mapping.Column("ArticleNumber");
                                                     mapping.Generator(Generators.Native);
                                                 });

        Map<string, Product_i18n>(
            product => product.Languages,
            mapping =>
                {
                },
            mapkey =>
                {
                    mapkey.Element(k =>
                                       {
                                           k.Column("LanguageCode");
                                       });
                }, 
            mapvalue =>
                {
                    mapvalue.OneToMany();
                });
    }
}
class Product_i18n_Map : ClassMapping<Product_i18n>
{
    public Product_i18n_Map()
    {
        /*ComposedId(mapper =>
                    {
                        mapper.Property(n => n.Product);
                        mapper.Property(n => n.LanguageCode);
                    });
         * */
        Table("Product_i18n");
        Id(n => n.Id, mapper =>
                          {
                              mapper.Column("Product_i18nId");
                              mapper.Generator(Generators.Native);
                          });

        Property(n => n.LanguageCode, mapping =>
                                          {
                                              mapping.Column("LanguageCode");
                                          });

        ManyToOne(n => n.Product, mapping =>
                                      {
                                          mapping.Column("Product");
                                      });
        Property(n => n.Name);
    }
}

这是我获取信息的主要功能:

        Configuration config = new Configuration();
        config.SessionFactory().GenerateStatistics();
        config.DataBaseIntegration(Configure);

        ModelMapper mapper = new ModelMapper();
        mapper.AddMapping<Product_i18n_Map>();
        mapper.AddMapping<ProductMap>();

        config.AddMapping(mapper.CompileMappingForAllExplicitlyAddedEntities());

        var lines = config.GenerateSchemaCreationScript(new MsSql2008Dialect());

        foreach (var curLine in lines)
            Console.WriteLine(curLine);

        Console.WriteLine(Thread.CurrentThread.CurrentUICulture.IetfLanguageTag);

        ISessionFactory factory = config.BuildSessionFactory();
        using (ISession session = factory.OpenSession())
        {
            Product p1 = new Product() { ArticleNumber = "4711" };
            session.Save(p1);

            Product_i18n p1ger = new Product_i18n() { LanguageCode = "de-DE", Name = "Playstation", Product = p1 };
            Product_i18n p1jap = new Product_i18n() { LanguageCode = "JP", Name = "プレイステーション", Product = p1 };
            session.Save(p1ger);
            session.Save(p1jap);

            var query = session.QueryOver<Product>().List();
            var query2 = session.QueryOver<Product_i18n>().List();

            session.Close();
        }

1 个答案:

答案 0 :(得分:2)

问题实际上是您的测试 - 您创建一个新产品(p1)并通过调用Save将其附加到会话,这会将p1与会话相关联,因此无论何时从同一会话中检索该产品,它都将返回相同的实例。这意味着当你执行session.QueryOver()。List()时,该列表将包含完全相同的p1实例 - 它不会创建新实例并从数据库中填充它。

您有两种选择:   1)明确地将Product_i18n实例添加到p1字典   2)在新会话中检索产品之前刷新并关闭会话

我建议您同时为您的测试做这两个选项,第一个选项是保持代码的一致性,第二个选项是测试其他会话是否正确检索数据。