# execute(_:with:) Returns a value as appropriate for the given request, or nil if the request cannot be completed. ``` func execute(_ request: NSPersistentStoreRequest, with context: NSManagedObjectContext?) throws -> Any ``` ## Parameters `request` A fetch request. `context` The managed object context used to execute `request`. ## Return Value A value as appropriate for `request`, or `nil` if the request cannot be completed ## Discussion The value to return depends on the result type (see [`resultType`](/documentation/CoreData/NSFetchRequest/resultType)) of `request`: - If it is `NSManagedObjectResultType`, `NSManagedObjectIDResultType`, or `NSDictionaryResultType`, the method should return an array containing all objects in the store matching the request. - If it is `NSCountResultType`, the method should return an array containing an `NSNumber` whose value is the count of all objects in the store matching the request. - If the request is a save request, the method should return an empty array. If the save request contains nil values for the inserted/updated/deleted/locked collections; you should treat it as a request to save the store metadata. You should implement this method conservatively, and expect that unknown request types may at some point be passed to the method. The correct behavior in these cases is to return `nil` and an error. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)