我在 FluentNHibernate 中启用了二级缓存:
Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2005
.ConnectionString(connectionString)
.Cache(c => c.ProviderClass<SysCacheProvider>().UseQueryCache())
)
.Mappings(m => m.FluentMappings.AddFromAssemblyOf<PersonMap>());
我的映射如下:
public PersonMap()
{
Id(x => x.Id);
Map(x => x.Name);
Cache.ReadWrite();
}
当我从存储库中调用 Persons 时,我运行:
var query = session.GetSession().CreateCriteria<Person>("p")
.Add(Expression.Eq("p.Org.Id", orgRep.GetOrg().Id));
query.SetCacheable(true);
return query.List<Person>().AsQueryable<Person>();
当我启动应用程序时,一切(包括缓存)都工作正常。我的第一个查询将访问数据库,但以下查询不会。当我拯救这个人时,问题就出现了。人被保存如下:
public virtual void Save(Person p)
{
if (p.Id > 0 && session.GetSession().Get<Person>(p.Id).Org != orgRep.GetOrg())
throw new SecurityException("Organization mismatch");
session.GetSession().Merge(p);
session.GetSession().Flush();
}
保存有效,但之后缓存不起作用。查询将始终访问数据库。查看 nhibernate 日志后发现:
DEBUG - Checking query spaces for up-to-dateness [[Person]]
DEBUG - Fetching object 'NHibernate-Cache:UpdateTimestampsCache:[Person]@1639794674' from the cache.
DEBUG - cached query results were not up to date for: sql: SELECT this_.Id as Id0_0_, this_.Name as Name0_0_, this_.Org_id as Org5_0_0_ FROM [Person] this_ WHERE this_.Org_id = ?; parameters: ['1']; first row: 0
我究竟做错了什么?