[英]EF7 beta6: ReadAsync error on Update
I am creating an API using ASP.NET5 and Entity Framework 7.0.0-beta 6, and when I try to execute an update, I get this Exception: 我正在使用ASP.NET5和Entity Framework 7.0.0-beta 6创建一个API,当我尝试执行更新时,出现此异常:
An exception of type 'Microsoft.Data.Entity.DbUpdateException' ocurred in mscorlib.dll but was not handled in user code. mscorlib.dll中发生类型'Microsoft.Data.Entity.DbUpdateException'的异常,但未在用户代码中处理。
{"An error occurred while updating the entries. See the inner exception for details."} {“更新条目时发生错误。有关详细信息,请参阅内部异常。”}
Invalid attempt to call ReadAsync when reader is closed. 当阅读器关闭时,无效的尝试调用ReadAsync。
The update operation finish correctly, and the changes are persisted to the database, but I get this exception. 更新操作正确完成,并且更改保存到数据库中,但是出现此异常。
My code is really simple, and I do not try to read anything after the update operation: 我的代码非常简单,并且在更新操作之后我不尝试读取任何内容:
public class CompanyRepository : ICompanyRepository
{
MrBellhopContext _dbcontext;
public async Task UpdateAsync(Company company)
{
_dbcontext.Update(company);
await _dbcontext.SaveChangesAsync();
}
}
[Route("api/[controller]")]
public class CompanyController : Controller
{
[HttpPut]
public async void UpdateAsync([FromBody] Company company)
{
if ((!ModelState.IsValid) || (company == null))
{
Context.Response.StatusCode = 400;
return;
}
else
{
await _repository.UpdateAsync(company);
}
}
}
And this is the Stacktrace: 这是Stacktrace:
at Microsoft.Data.Entity.Update.AffectedCountModificationCommandBatch.<ConsumeAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.Data.Entity.Update.ReaderModificationCommandBatch.<ExecuteAsync>d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.Data.Entity.Update.BatchExecutor.<ExecuteAsync>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
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.Data.Entity.ChangeTracking.Internal.StateManager.<SaveChangesAsync>d__27.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
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.Data.Entity.DbContext.<SaveChangesAsync>d__27.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at MrBellhop.Data.Repositories.Company.CompanyRepository.<UpdateAsync>d__5.MoveNext() in D:\SciOf\MrBellhop\MrBellhop.Data\Repositories\Company\CompanyRepository.cs:line 47
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at MrBellhop.API.Controllers.Company.CompanyController.<UpdateAsync>d__9.MoveNext() in D:\SciOf\MrBellhop\MrBellhop.API\Controllers\Company\CompanyController.cs:line 62
Does anyone know how to solve this issue? 有谁知道如何解决这个问题?
Solved! 解决了!
I have modified the Controller to return a Task: 我已修改控制器以返回任务:
[Route("api/[controller]")]
public class CompanyController : Controller
{
[HttpPut]
public async Task UpdateAsync([FromBody] Company company)
{
if ((!ModelState.IsValid) || (company == null))
{
Context.Response.StatusCode = 400;
return;
}
else
{
await _repository.UpdateAsync(company);
}
}
}
+info: https://github.com/aspnet/EntityFramework/issues/2786 + info: https : //github.com/aspnet/EntityFramework/issues/2786
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