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我使用 EF Core 3.1,这是我的代码:
public async Task DeleteSessions(List<Guid> ids)
{
var sessions = new List<Session>();
foreach (var sessionId in ids)
{
var session = await _dbContext.Sessions.FindAsync(sessionId);
sessions.Add(session);
}
_dbContext.Sessions.RemoveRange(sessions);
// error occurred on this line
await _dbContext.SaveChangesAsync();
}
但是在 SaveChagedAsync 上抛出异常并出现此错误
Failed to compare two elements in the array - At least one object mustimplement IComparable
public async Task DeleteSessions(List<Guid> ids)
{
foreach (var sessionId in ids)
{
var session = await _dbContext.Sessions.FindAsync(sessionId);
_dbContext.Sessions.Remove(session);
}
// error occurred on this line
await _dbContext.SaveChangesAsync();
}
但没关系,
SaveChagedAsync
上抛出异常再次方法
SaveChangedAsync
该方法工作正常,但我需要在一个事务中删除多行。
public class Session
{
public BusinessId Id { get; private set; }
public string Title { get; private set; }
public DateTime StartDate { get; private set; }
public int ExtraDurationAsMinute { get; private set; }
public string LatestServerId { get; private set; }
public Courses.Course Course { get; private set; }
private Session()
{
}
public static async Task<Session> Create(Guid sessionId, Courses.Course course, DateTime startDate, string title)
{
var session = new Session
{
Id = sessionId,
Course = course
};
session.ChangeStartDate(startDate);
session.ChangeTitle(title);
return session;
}
public void ChangeServer(string serverId)
{
this.LatestServerId = serverId;
}
public void ChangeTitle(string title)
{
if (Title == title)
{
return;
}
this.Title = title;
}
public void ChangeStartDate(DateTime startDate)
{
if (StartDate == startDate)
{
return;
}
this.StartDate = startDate;
Course.CalculateFirstAndLastSession();
}
public void ChangeExtraDuration(int duration)
{
if (ExtraDurationAsMinute == duration)
{
return;
}
ExtraDurationAsMinute = duration;
Course.CalculateFirstAndLastSession();
}
}
这是 EF session 配置:
public class SessionConfiguration : IEntityTypeConfiguration<Core.DomainModels.Sessions.Session>
{
public void Configure(EntityTypeBuilder<Core.DomainModels.Sessions.Session> builder)
{
builder.Property(x => x.Id)
.HasConversion(x => x.Value,
x => BusinessId.FromGuid(x));
builder.Property(x => x.LatestServerId).HasMaxLength(100);
builder.HasOne(x => x.Course);
}
}
这是异常堆栈跟踪:
at System.Collections.Generic.ArraySortHelper`1.Sort(T[] keys, Int32 index, Int32 length, IComparer`1 comparer)
at System.Array.Sort[T](T[] array, Int32 index, Int32 length, IComparer`1 comparer)
at System.Collections.Generic.List`1.Sort(Int32 index, Int32 count, IComparer`1 comparer)
at Microsoft.EntityFrameworkCore.Update.Internal.CommandBatchPreparer.<BatchCommands>d__11.MoveNext()
at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.<ExecuteAsync>d__8.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.<ExecuteAsync>d__8.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.<SaveChangesAsync>d__97.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.<SaveChangesAsync>d__101.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.<ExecuteAsync>d__7`2.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.EntityFrameworkCore.DbContext.<SaveChangesAsync>d__54.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at SilverPath.Infra.Data.Sql.Commands.BaseEntityFrameworkUnitOfWork`1.<CommitAsync>d__5.MoveNext() in O:\Projects\SpAzure\Elearno-Reborn\Institute\Develop\Framework\SilverPath.Infra.Data.Sql.Commands\BaseEntityFrameworkUnitOfWork.cs:line 32
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at ElearnoInstitute.Core.ApplicationServices.Sessions.Command.SaveSessions.SaveSessionHandler.<Handle>d__2.MoveNext() in O:\Projects\SpAzure\Elearno-Reborn\Institute\Develop\Institute\src\Core\ElearnoInstitute.Core.ApplicationServices\Sessions\Command\SaveSessions\SaveSessionHandler.cs:line 83
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at SilverPath.Framework.EndPoints.Web.Controllers.BaseApiController.<Execute>d__11`1.MoveNext() in O:\Projects\SpAzure\Elearno-Reborn\Institute\Develop\Framework\SilverPath.EndPoints.Web\Controllers\BaseApiController.cs:line 66
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at ElearnoInstitute.Endpoint.ClientApi.Controllers.V1.SessionController.<SaveSession>d__3.MoveNext() in O:\Projects\SpAzure\Elearno-Reborn\Institute\Develop\Institute\src\Endpoint\ElearnoInstitute.Endpoint.ClientApi\Controllers\V1\SessionController.cs:line 85
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.<Execute>d__0.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Threading.Tasks.ValueTask`1.get_Result()
at System.Runtime.CompilerServices.ValueTaskAwaiter`1.GetResult()
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<<InvokeActionMethodAsync>g__Logged|12_1>d.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<<InvokeNextActionFilterAsync>g__Awaited|10_0>d.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<<InvokeInnerFilterAsync>g__Awaited|13_0>d.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<<InvokeNextResourceFilter>g__Awaited|24_0>d.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<<InvokeFilterPipelineAsync>g__Awaited|19_0>d.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<<InvokeAsync>g__Logged|17_1>d.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<<Invoke>g__AwaitRequestTask|6_0>d.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.<Invoke>d__5.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.<Invoke>d__6.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.<Invoke>d__5.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.<Invoke>d__4.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNetCore.Diagnostics.StatusCodePagesMiddleware.<Invoke>d__3.MoveNext()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at SilverPath.Framework.EndPoints.Web.Middlewares.ApiExceptionHandler.ApiExceptionMiddleware.<Invoke>d__5.MoveNext() in O:\Develop\Framework\EndPoints.Web\Middlewares\ApiExceptionHandler\ApiExceptionMiddleware.cs:line 35
最佳答案
Ef 在更新行时需要确定性顺序,因为如果有两个线程更新相同的行并且顺序颠倒,则可能会导致死锁
看到这个SaveChanges() deadlocks
所以
BusinessId should implement IComparable<BusinessId>
你的问题将得到解决:)
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