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我使用Nhibernate 3.2,Firebird Net Provider 2.7和Criteria。在谷歌搜索後如何返回只有一個記錄在數據庫我來到這...如何使用Nhibernate + Criteria + Firebird僅從數據庫返回一條記錄?
var criteria = session.CreateCriteria(typeof(T))
.SetFirstResult(0)
.SetMaxResults(1)
.Add(getRestricao(rest))
.UniqueResult<T>();
tx.Commit();
return criteria;
但不行!錯誤是:
NHibernate.Exceptions.GenericADOException : could not execute query
[ /* criteria query */ SELECT this_.idPermissao as idPermis1_21_0_, this_.nomePermissao as nomePerm2_21_0_, this_.permissao as permissao21_0_ FROM Permissao this_ WHERE this_.nomePermissao = ? ]
Name:cp0 - Value:Administrador
[SQL: /* criteria query */ SELECT this_.idPermissao as idPermis1_21_0_, this_.nomePermissao as nomePerm2_21_0_, this_.permissao as permissao21_0_ FROM Permissao this_ WHERE this_.nomePermissao = ?]
----> System.ArgumentException : index should be greater than or equal to 0
Parameter name: index
如何從標準的火鳥生成「選擇第一個1」?謝謝!
是否存在零條記錄,則返回null,不拋出異常。糾正我,如果我錯了,但它不只是拋出一個''NonUniqueResultException''如果有多個結果?請參閱:[AbstractQueryImpl行959](https://github.com/nhibernate/nhibernate-core/blob/master/src/NHibernate/Impl/AbstractQueryImpl.cs#L959)。 – annemartijn 2014-04-14 11:45:58