My class Friendship has a column named recentSender that is a one-to-one relation to another User:
http://support.backendless.com/public/attachments/42e60432e2e863dc2babcfb35e6e71c9.png</img>
As you see, the Friendship in the screenshot above indeed points to a User object.
However, when I query for that friendship, it says the recentSender is nil. And when I click on that link that the red arrow is pointing to in order to view that User object, I get this error:
http://support.backendless.com/public/attachments/5b51e4e6ef409699fc9413d741ea075e.png</img>
Closer up:
http://support.backendless.com/public/attachments/cfba79ccd9b9f3fa5f37288f92ea2672.png</img>