Handling Detached Entities in Entity Framework Core 6 During Bulk Updates
I'm a bit lost with I'm trying to implement I'm currently working on a project using Entity Framework Core 6, and I'm facing an issue with updating a collection of detached entities..... The scenario involves fetching a list of records from the database, allowing users to modify them in a UI, and then attempting to save those changes back to the database. However, when I call `SaveChanges()`, I'm encountering a `DbUpdateConcurrencyException`. I suspect this is due to the way I'm managing the state of the entities. Here’s a simplified version of my update method: ```csharp public async Task UpdateRecordsAsync(List<MyEntity> updatedEntities) { using var context = new MyDbContext(); foreach (var entity in updatedEntities) { context.Entry(entity).State = EntityState.Modified; } await context.SaveChangesAsync(); } ``` The `updatedEntities` list contains entities that were initially fetched but have been modified by the user. I’ve tried checking the original values and ensuring there's no concurrency conflict, but the exception keeps occurring. To troubleshoot, I've logged the original values from the database and compared them with the incoming values. It seems like the timestamps for the entities are causing the conflict. I've also tried setting the `ConcurrencyCheck` attribute on my timestamp column, but it doesn’t seem to resolve the issue. Additionally, I checked if the entities are in a valid state before calling `SaveChangesAsync`. What would be the best approach to handle this situation? Should I be using a different method for attaching or updating these entities, or is there a recommended approach for managing detached entities with concurrency in EF Core? Any insights would be greatly appreciated! I'm working in a Windows 10 environment. Thanks for any help you can provide! Could someone point me to the right documentation?