FluentNHibernate，映射关联错误

Question

我在使用 FluentNHibernate 的 MVC3 应用程序运行时收到以下错误，但似乎无法找出映射问题：

表 UserRole 中的关联引用了未映射的类：Domain.Entities.User 描述：执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其在代码中的来源的更多信息。

异常详细信息：NHibernate.MappingException：表 UserRole 中的关联引用未映射的类：Domain.Entities.User

源错误： 公共 ISessionFactory CreateSessionFactory() { 返回 Fluently.Configure() .数据库(MsSqlConfiguration.MsSql2008 .ConnectionString(c => c.FromConnectionStringWithKey("AppData")))

两个相关的类和映射：看不出这里有什么问题？！

public class User : IUser
{
    public virtual int Id { get; set; }
    public virtual string UserName { get; set; }
    public virtual string Password { get; set; }
    public virtual string FirstName { get; set; }
    public virtual string LastName { get; set; }
    public virtual string Email { get; set; }
    public virtual Guid UserGUID { get; set; }
    public virtual int FileQuota { get; set; }
    public virtual Company Company { get; set; }
    public virtual IList<UserRole> UserRoles { get; set; }
    public virtual IList<CloudFile> CloudFiles { get; set; }
}

public class UserRole : IUserRole
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual User User { get; set; }
}

public class UserMap : ClassMap<User>
{
    public UserMap()
    {
        Id(x => x.Id).GeneratedBy.Identity();
        Map(x => x.UserName);
        Map(x => x.FirstName);
        Map(x => x.Password);
        Map(x => x.LastName);
        Map(x => x.Email);
        Map(x => x.UserGUID);
        Map(x => x.FileQuota);
        References(x => x.Company);
        HasMany(x => x.UserRoles).Cascade.All();
        HasMany(x => x.CloudFiles).Cascade.All();
    }
}

public class UserRoleMap : ClassMap<UserRole>
{
    public UserRoleMap()
    {
        Id(x => x.Id).GeneratedBy.Identity();
        Map(x => x.Name);
        References(x => x.User);
    }
}

有什么想法吗？

添加我的会话工厂：

    public ISessionFactory CreateSessionFactory()
    {
        return Fluently.Configure()
            .Database(MsSqlConfiguration.MsSql2008
                           .ConnectionString(c => c.FromConnectionStringWithKey("AppData")))
                           .Mappings(m => m.FluentMappings.Add(typeof(Domain.Mappings.UserMap)))
                           .Mappings(m => m.FluentMappings.Add(typeof(Domain.Mappings.CloudFileMap)))
                           .Mappings(m => m.FluentMappings.Add(typeof(Domain.Mappings.CompanyMap)))                               
                           .Mappings(m => m.FluentMappings.Add(typeof(Domain.Mappings.UserRoleMap)))
                           //.ExposeConfiguration(BuildSchema)
                           .BuildSessionFactory();
    }

Answer 1

我认为当您一遍又一遍地调用 .Mappings(/*mappings*/) 时，您实际上是在重置映射。

这样效果更好吗？

public ISessionFactory CreateSessionFactory()
    {
        return Fluently.Configure()
            .Database(MsSqlConfiguration.MsSql2008
                           .ConnectionString(c => c.FromConnectionStringWithKey("AppData")))
                           .Mappings(m => 
                           {
                            m.FluentMappings.Add(typeof(Domain.Mappings.UserMap));
                            m.FluentMappings.Add(typeof(Domain.Mappings.CloudFileMap));
                            m.FluentMappings.Add(typeof(Domain.Mappings.CompanyMap));
                            m.FluentMappings.Add(typeof(Domain.Mappings.UserRoleMap));
                           })
                           //.ExposeConfiguration(BuildSchema)
                           .BuildSessionFactory();
    }

Answer 2

我会改变您将映射添加到配置的方式。布鲁克的答案是正确的，但如果您的映射都在同一个程序集中，我会这样做：

public ISessionFactory CreateSessionFactory()
{
    return Fluently.Configure()
        .Database(MsSqlConfiguration.MsSql2008
                       .ConnectionString(c => c.FromConnectionStringWithKey("AppData")))
                       .Mappings(m => 
                       {
                        m.FluentMappings.AddFromAssemblyOf<UserMap>()
                       })
                       //.ExposeConfiguration(BuildSchema)
                       .BuildSessionFactory();
}

这样您就不必每次创建新映射时都将新映射添加到您的配置中。