我在迁移中将表中的一列定义为唯一的。如果我尝试保存违反此唯一性约束的记录,我当然会收到异常:
A duplicate value cannot be inserted into a unique index.
为了保存记录,我使用了 IRepository Create 和 Update 方法,因为它没有相应的部分。收到上述异常后,我将其捕获,然后启动 AddModelError 以停止保存过程。Neverthless Orchard 在那之后给了我另一个例外:
[AssertionFailure: null id in MyModule.Models.MyRecord entry (don't flush the Session after an exception occurs)]
NHibernate.Event.Default.DefaultFlushEntityEventListener.CheckId(Object obj, IEntityPersister persister, Object id, EntityMode entityMode) +267
NHibernate.Event.Default.DefaultFlushEntityEventListener.GetValues(Object entity, EntityEntry entry, EntityMode entityMode, Boolean mightBeDirty, ISessionImplementor session) +95
NHibernate.Event.Default.DefaultFlushEntityEventListener.OnFlushEntity(FlushEntityEvent event) +139
NHibernate.Event.Default.AbstractFlushingEventListener.FlushEntities(FlushEvent event) +448
NHibernate.Event.Default.AbstractFlushingEventListener.FlushEverythingToExecutions(FlushEvent event) +283
NHibernate.Event.Default.DefaultAutoFlushEventListener.OnAutoFlush(AutoFlushEvent event) +84
NHibernate.Impl.SessionImpl.AutoFlushIfRequired(ISet`1 querySpaces) +471
NHibernate.Impl.SessionImpl.List(IQueryExpression queryExpression, QueryParameters queryParameters, IList results) +477
NHibernate.Impl.AbstractSessionImpl.List(IQueryExpression queryExpression, QueryParameters parameters) +223
NHibernate.Impl.ExpressionQueryImpl.List() +189
NHibernate.Linq.DefaultQueryProvider.ExecuteQuery(NhLinqExpression nhLinqExpression, IQuery query, NhLinqExpression nhQuery) +61
NHibernate.Linq.DefaultQueryProvider.Execute(Expression expression) +262
NHibernate.Linq.DefaultQueryProvider.Execute(Expression expression) +26
Remotion.Linq.QueryableBase`1.GetEnumerator() +83
System.Linq.Enumerable.ToDictionary(IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer) +173
System.Linq.Enumerable.ToDictionary(IEnumerable`1 source, Func`2 keySelector) +125
Orchard.Data.Migration.DataMigrationManager.GetFeaturesThatNeedUpdate() +311
Orchard.Modules.Data.Migration.<GetNotifications>d__6.MoveNext() +219
System.Linq.<SelectManyIterator>d__14`2.MoveNext() +507
System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +536
System.Linq.Enumerable.ToList(IEnumerable`1 source) +80
Orchard.UI.Admin.Notification.NotificationManager.GetNotifications() +151
Orchard.UI.Admin.Notification.AdminNotificationFilter.OnResultExecuting(ResultExecutingContext filterContext) +380
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +245
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +890
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +890
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +890
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +890
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +97
System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +241
System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +111
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +53
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +19
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +51
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +111
Orchard.Mvc.Routes.HttpAsyncHandler.EndProcessRequest(IAsyncResult result) +95
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +606
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288
如果我正确理解导致它的原因,即使我添加了模型错误,Orchard 也会自动尝试将记录刷新到数据库中。我试图改变交易范围,但没有奏效。有没有办法解决这个问题?