return await _context.SaveChangesAsync(cancellationToken);
如果上述代码出现问题,我希望能够将其捕获并记录为数据库中的警告,但目前它会自动保存为错误,而实际上应该是警告。
以下是我得到的错误:
在保存上下文类型“ValuationsReporting.Models.ValuationsReportingContext”的更改时,数据库中发生了异常。 System.InvalidOperationException: 在实体类型“ValuationFundTemplate”上,“TemplateTypeId”属性具有临时值。请显式设置一个永久值,或确保数据库配置为为此属性生成值。 at Microsoft.EntityFrameworkCore.Update.Internal.CommandBatchPreparer.Validate(ModificationCommand modificationCommand) at Microsoft.EntityFrameworkCore.Update.Internal.CommandBatchPreparer.BatchCommands(IReadOnlyList`1 entries)+MoveNext() at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(DbContext _, ValueTuple`2 parameters, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Storage.ExecutionStrategy.ExecuteImplementationAsync[TState,TResult](Func`4 operation, Func`4 verifySucceeded, TState state, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Storage.ExecutionStrategy.ExecuteImplementationAsync[TState,TResult](Func`4 operation, Func`4 verifySucceeded, TState state, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(IReadOnlyList`1 entriesToSave, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.DbContext.SaveChangesAsync(Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken)
System.InvalidOperationException
Microsoft.EntityFrameworkCore.Update
我尝试使用try catch语句,但一旦运行到那一行,错误就会在数据库中记录。
实际代码:
try
{
foreach (var template in snapshotDto.SnapshopFundTemplateDtos)
{
if (template.FundId != null)
{
foreach (var fundId in template.FundId)
{
var tempTemplate = allFundTemplates.Where(x => x.ValuationId == valuation.Id && x.FundId == fundId && x.TemplateTypeId == template.TemplateTypeId).FirstOrDefault();
//var tempTemplate = await _valuationFundTemplateRepository.GetOne(valuation.Id, fundId, template.TemplateTypeId, true, cancellationToken);
if (tempTemplate == null)
{
tempTemplate = new ValuationFundTemplate();
tempTemplate.CreatedBy = _userRepository.claimsPrincipal.Identity.Name;
tempTemplate.CreatedOn = DateTime.Now.ToUniversalTime();
isTemplateUpdate = false;
}
//tempTemplate.IsDeleted = false;
//if (template.IsDeleted)
//{
// _valuationFundTemplateRepository.Delete(tempTemplate);
//}
//else
//{
//tempTemplate.IsDeleted = template.IsDeleted;
tempTemplate.IsDeleted = false;
tempTemplate.IsDefaultFundTemplate = template.IsDefault;
tempTemplate.FundId = fundId;
tempTemplate.ValuationId = valuation.Id;
tempTemplate.TemplateTypeId = 0;
tempTemplate.TemplateId = template.TemplateId;
tempTemplate.ModifiedBy = _userRepository.claimsPrincipal.Identity.Name;
tempTemplate.ModifiedOn = DateTime.Now.ToUniversalTime();
tempTemplates.Add(tempTemplate);
if (isTemplateUpdate)
{
_valuationFundTemplateRepository.Update(tempTemplate);
}
else
{
await _valuationFundTemplateRepository.Insert(tempTemplate, cancellationToken);
}
// }
await _valuationFundTemplateRepository.SaveAsync(cancellationToken);//here is where the error occurs which i dont want to capture in database.
if (!isTemplateUpdate)
valuation.ValuationFundTemplate.Add(tempTemplate);
}
}
}
}catch(Exception e)
{
var z = e.Message;
}
public virtual async Task<int> SaveAsync(CancellationToken cancellationToken = default(CancellationToken))
{
return await _context.SaveChangesAsync(cancellationToken);
}