我的项目需要处理三个数据库，这意味着三届工厂。事情是，如果我做这样的事情用流利的NHibernate：

My project needs to handle three databases, that means three session factories. The thing is if i do something like this with fluent nhibernate:

.Mappings(m => m.FluentMappings.AddFromAssembly(Assembly.GetExecutingAssembly()))

工厂便拿起所有的映射，甚至对应于另一个数据库的那些

the factories would pick up all the mappings, even the ones that correspond to another database

我已经看到了使用自动映射时，你可以做这样的事情，和过滤网命名空间：

I've seen that when using automapping you can do something like this, and filter by namespace:

.Mappings(m => m.AutoMappings.Add(
    AutoMap
       .AssemblyOf<Product>()
       .Where(t => t.Namespace == "Storefront.Entities")))

我还没有发现这样的事了一口流利的映射，有没有可能？唯一的解决方案，我能想到的是：可以创建单独的程序集为每个数​​据库映射类或明确地将每个实体到出厂配置。

I havent found anything like this for fluent mappings, is it possible?? The only solutions I can think of are: either create separate assemblies for each db mapping classes or explicitly adding each of the entities to the factory configuration.

我会preFER避免两个，如果可能的话。谢谢你。

I would prefer to avoid both, if possible. Thanks.

推荐答案

我已经完全实现了这个使用（我自己）在流利的映射文件属性，以决定哪些数据块中的实体属于，我也已经有了一个概念一个默认的数据库，并没有一个属性映射文件被假定为位于默认的数据库（它可能会削减你需要装饰类的数量）。 然后，我有初始化code的创建每个数据库会话工厂，并为每个，使用反射来找到所有ClassMap类，检查属性，以确定哪些DB它属于，并记录每个ClassMap相应。

I've implemented exactly this using (my own) Attribute on the Fluent mapping file to dictate which DB the entity belongs in. I've also got a concept of a 'default' database, and mapping files without an attribute are assumed to reside in the default DB (it may cut down on the number of classes you need to decorate). I then have initialisation code which creates a Session Factory per database, and for each, uses reflection to find all ClassMap classes,examines the attribute to determine which DB it belongs to, and registers each ClassMap accordingly.

一个映射文件，例如：

  [FluentNHibernateDatabase("MySecurityDatabase")]
  public class SystemUserMap : ClassMap<SystemUser>
  {
    public SystemUserMap()
    {
      Id(x => x.SystemUserId);
      Map(x => x.LoginId);
      Map(x => x.LoginPassword);
      Map(x => x.UserFirstName);
      Map(x => x.UserSurname);
      References(x => x.UserOrganisation, "OrganisationId");
    }
  }

很显然，我已经定义了被引用/使用的数据块列表。 我的执行工作，到目前为止，我已经采取了，但我已经遇到了障碍（即我希望有人可以帮忙带）：

Obviously I've defined a list of the DBs that are referenced/used. My implementation works so far as I've taken it, but I've hit a snag (that I hope someone can help out with):

我问过我的问题在这里： http://stackoverflow.com/questions/2698503/how-to-identify-a-particular-entitys-session-factory-with-fluent-nhibernate-and

I've asked my question here: http://stackoverflow.com/questions/2698503/how-to-identify-a-particular-entitys-session-factory-with-fluent-nhibernate-and