Question

我有几个测试我正在顺序运行（不使用ms测试）。我遇到一个问题，当我尝试使用NHibernate删除对象时，当我尝试运行任何类型的查询时（除了使用NHibernate添加的例外），它会强制下一个测试失败。我已经能够通过在删除语句后使用Unbind和Bind解决此问题，但这需要很长时间。我想知道是否还有其他方法可以解决这个问题。

一个例子：

    [TestMethod]
    public void MyTest() {
        QTestData testData = new QTestData();
        testData.MyProperty = "CookieMonsterPanda";
        QNHibernateHelper.Add(testData);
        //Still working at this point
        testData.MyProperty = "FooBar";
        QNHibernateHelper.Update(testData);
        //Still working at this point
        Assert.AreEqual(testData, RQTestData.GetTestDataByMyProperty("FooBar"));
        QNHibernateHelper.Delete(testOrderLine);
        //If I were to run this test again or any other test without these
        //next two lines I would get an exception
        QNHibernateHelper.UnbindSession();
        QNHibernateHelper.BindSession();
    }

示例异常和NHibernate堆栈跟踪：

Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> NHibernate.Exceptions.GenericADOException: could not delete: [Quorra.Entities.QTestData#12915489][SQL: DELETE FROM test_data WHERE testdatanumber = ?] ---> MySql.Data.MySqlClient.MySqlException: Cannot delete or update a parent row: a foreign key constraint fails (`stuff_20130619`.`test_data`, CONSTRAINT `FK_test_data__test_data` FOREIGN KEY (`origtestdata`) REFERENCES `test_data` (`stuff`) ON DELETE NO ACTION ON UPDATE NO ACTION)

堆栈追踪：

   at MySql.Data.MySqlClient.MySqlStream.ReadPacket()
   at MySql.Data.MySqlClient.NativeDriver.GetResult(Int32& affectedRow, Int32& insertedId)
   at MySql.Data.MySqlClient.Driver.GetResult(Int32 statementId, Int32& affectedRows, Int32& insertedId)
   at MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force)
   at MySql.Data.MySqlClient.MySqlDataReader.NextResult()
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader()
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery()
   at NHibernate.AdoNet.AbstractBatcher.ExecuteNonQuery(IDbCommand cmd)
   at NHibernate.AdoNet.NonBatchingBatcher.AddToBatch(IExpectation expectation)
   at NHibernate.Persister.Entity.AbstractEntityPersister.Delete(Object id, Object version, Int32 j, Object obj, SqlCommandInfo sql, ISessionImplementor session, Object[] loadedState)
   --- End of inner exception stack trace ---
   at NHibernate.Persister.Entity.AbstractEntityPersister.Delete(Object id, Object version, Int32 j, Object obj, SqlCommandInfo sql, ISessionImplementor session, Object[] loadedState)
   at NHibernate.Persister.Entity.AbstractEntityPersister.Delete(Object id, Object version, Object obj, ISessionImplementor session)
   at NHibernate.Action.EntityDeleteAction.Execute()
   at NHibernate.Engine.ActionQueue.Execute(IExecutable executable)
   at NHibernate.Engine.ActionQueue.ExecuteActions(IList list)
   at NHibernate.Engine.ActionQueue.ExecuteActions()
   at NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session)
   at NHibernate.Event.Default.DefaultAutoFlushEventListener.OnAutoFlush(AutoFlushEvent event)
   at NHibernate.Impl.SessionImpl.AutoFlushIfRequired(ISet`1 querySpaces)
   at NHibernate.Impl.SessionImpl.List(String query, QueryParameters queryParameters, IList results)
   at NHibernate.Impl.SessionImpl.List[T](String query, QueryParameters parameters)
   at NHibernate.Impl.QueryImpl.List[T]()

编辑1：

它打破了同一类型对象的foriegn键（它是同一类的父类）。问题是在这种情况下，我得到的其他错误具有相同的性质，这些键被设置为null。它们是由nhibernate动态创建的，将它们添加到db中。什么让我感到震惊，但是当我添加一个绑定/解除绑定时，它能够解决这个问题。

NHibernate会话绑定和缓存失败

0 个答案: