I believe this is I still an issue for aspnet core ( ef core perhaps?) 3.1.. jeroenlandheer mentioned this issue Jul 22, 2020 Enumerator failed to Mo veNextAsync when there’s more than 1 record when using SingleOrDefaultAsync(CancellationToken) #21729, Enumerator failed to MoveNextAsync when there’s more than 1 record when using SingleOrDefaultAsync(CancellationToken) #21729 Closed jeroenlandheer opened this issue Jul.
9/28/2020 · I have extracted this into small sample and create a repository: efcore_broken_migration Steps to reproduce Clone the repository Delete migrations folder Create a migration. It creates what seems to be a normal migration (I use command: dotnet ef migrations add Migration_1 ) Create a second migration without any changes to a code.
Browse other questions tagged c# ef – core -3.0 or ask your own question. The Overflow Blog Podcast 297: All Time Highs: Talking crypto with Li Ouyang, If the enumerator isn’t in a good state for MoveNextAsync to be called (for example, it’s already been disposed), then it just returns the equivalent of “new ValueTask (false).” Otherwise, it resets the ManualResetValueTaskSourceCore for the next iteration and calls (via a runtime helper) the MoveNext method just shown.
11/4/2019 · Entity Framework Core ‘s extension method SingleAsync throws an exception, if more than one element exists. The message of this exception is vague and does not match with it’s synchronous LINQ counterpart Single.. For comparison this is the message for the exception that is thrown by the Single method.. System.InvalidOperationException: Sequence contains more than one matching.
For the former of Get[Async] Enumerator there’s often deferred propagation due to the way iterators work, i.e. an iterator enumerating over a sequence will see the call to the sequence’s Get[Async] Enumerator occur in the iterator’s first call to MoveNext[Async], so exceptions caan naturally propagate there, because there’s still a consumer and …
FirstAsync (IQueryable , Expression >, CancellationToken) Asynchronously returns the first element of a sequence that satisfies a specified condition.
Advances the enumerator to the next element of the enumerator . public System.Threading.Tasks.Task MoveNextAsync (System.Threading.CancellationToken cancellationToken); abstract member MoveNextAsync : System.Threading.CancellationToken -> System.Threading.Tasks.Task, 2/20/2016 · Microsoft Driver Enumerator Windows 10 What exactly is the Microsoft Driver Enumerator AND why is it taking 30 to 50% of my cpu most of the time? Clearly, I can’t shut this service down, but if I could figure out what it’s doing, maybe I could satisfy its need for my cpu cycles.
