---
title: "detectConflicts(for:)"
framework: coredata
role: symbol
role_heading: Instance Method
path: "coredata/nsmanagedobjectcontext/detectconflicts(for:)"
---

# detectConflicts(for:)

Marks an object for conflict detection.

## Declaration

```swift
func detectConflicts(for object: NSManagedObject)
```

## Parameters

- `object`: A managed object.

## Discussion

Discussion If on the next invocation of save()     object has been modified in its persistent store, the save fails. This allows optimistic locking for unchanged objects. Conflict detection is always performed on changed or deleted objects.

## See Also

### Handling managed objects

- [shouldDeleteInaccessibleFaults](coredata/nsmanagedobjectcontext/shoulddeleteinaccessiblefaults.md)
- [insertedObjects](coredata/nsmanagedobjectcontext/insertedobjects.md)
- [updatedObjects](coredata/nsmanagedobjectcontext/updatedobjects.md)
- [deletedObjects](coredata/nsmanagedobjectcontext/deletedobjects.md)
- [shouldHandleInaccessibleFault(_:for:triggeredByProperty:)](coredata/nsmanagedobjectcontext/shouldhandleinaccessiblefault(_:for:triggeredbyproperty:).md)
- [insert(_:)](coredata/nsmanagedobjectcontext/insert(_:).md)
- [delete(_:)](coredata/nsmanagedobjectcontext/delete(_:).md)
- [assign(_:to:)](coredata/nsmanagedobjectcontext/assign(_:to:).md)
- [obtainPermanentIDs(for:)](coredata/nsmanagedobjectcontext/obtainpermanentids(for:).md)
- [refresh(_:mergeChanges:)](coredata/nsmanagedobjectcontext/refresh(_:mergechanges:).md)
- [processPendingChanges()](coredata/nsmanagedobjectcontext/processpendingchanges().md)
- [observeValue(forKeyPath:of:change:context:)](coredata/nsmanagedobjectcontext/observevalue(forkeypath:of:change:context:).md)