我试图这样做:
Key key = session.QueryOver<Key>()
.Left.JoinQueryOver<ConfigValue>(x => x.ConfigValues)
.Where(c => c.Id == cfgValue.Id)
.SingleOrDefault();
但我得到了这个例外:
NHibernate.QueryException was unhandled by user code
Message=could not resolve property: ConfigValues of: Domain.Model.Key
我认为这是因为Key
对象的声明方式是限制对IList的访问并使用不可见的属性进行映射。
public class Key
{
public virtual int Id { get; protected set; }
public virtual IEnumerable<ConfigValue> ConfigValues { get { return _configValues; } }
private IList<ConfigValue> _configValues = new List<ConfigValue>();
...
并按代码映射:
Bag<ConfigValue>("_configValues", attr => {
attr.Lazy(CollectionLazy.Lazy);
attr.Inverse(false);
attr.Cascade(Cascade.None);
}, cm => cm.ManyToMany());
问题:我怎样才能使用NHibernate API?
我设法做到的唯一方法是使用HQL:
IList<Key> keys = session.CreateQuery(@"select K_
from Key as K_
left outer join K_._configValues as KO_
where KO_.Id = :cfgValueId ")
.SetParameter("cfgValueId", cfgValue.Id)
.List<Key>();
答案 0 :(得分:2)
我对按代码进行映射不是很坚定,而是按行
Bag<ConfigValue>("ConfigValues", attr => {
attr.Access("field.camelcase-underscore");
}, cm => cm.ManyToMany());
或流利的NHibernate(如果有人感兴趣的话)
HasMany(x => x.ConfigValues)
.Access.CamelCaseField(Prefix.Underscore);