---
title: "objectIDs(forRelationshipNamed:)"
framework: coredata
role: symbol
role_heading: Instance Method
path: "coredata/nsmanagedobject/objectids(forrelationshipnamed:)"
---

# objectIDs(forRelationshipNamed:)

Returns the object IDs for all of the managed objects that are in the named relationship.

## Declaration

```swift
func objectIDs(forRelationshipNamed key: String) -> [NSManagedObjectID]
```

## See Also

### Supporting Key-Value Coding

- [value(forKey:)](coredata/nsmanagedobject/value(forkey:).md)
- [setValue(_:forKey:)](coredata/nsmanagedobject/setvalue(_:forkey:).md)
- [primitiveValue(forKey:)](coredata/nsmanagedobject/primitivevalue(forkey:).md)
- [setPrimitiveValue(_:forKey:)](coredata/nsmanagedobject/setprimitivevalue(_:forkey:).md)