Parse: Error 102 when querying an array of pointers - ios

Question

I've just started using Parse, its been fairly easy to understand until I got to the more advanced aspects such as saving an array of pointers.
I read on a Parse forum that the best way to do this was to save a JSON object to the server that defined an array of types, for example I have an array of users:
[
{
"__type":"Pointer",
"className":"_User",
"objectId":"YkIlOohXZV"
},
{
"__type":"Pointer",
"className":"_User",
"objectId":"MBe4g6t8av"
}
]
This information gets saved to Parse just fine, however when I come to query the data I never get a Parse error 102.
I have tried:
let myRequestsQuery = PFQuery("Requests")
myRequestsQuery.whereKey("recipients", containsString: PFUser.currentUser().objectId!)
Why am I getting an error 102? Is there a better way to search the array or do I have to query everything back from the server?

Answer 1

The problem is that you are comparing a pointer to a string, instead of to another parse object.
I work with parse on Android so I'm not sure about the syntax, but you should use a whereKey and equalTo the parse user itself (PFUser.currentUser()) and not a string lookup on it's ID since it's not stored as a string. When arrays are concerned, equalTo searches inside the for a match.
I don't know Swift, but I think it should look something like this in Obj-C:
PFQuery *query = [PFQuery queryWithClassName:#"Requests"];
[query whereKey:#"recipients" equalTo:[PFUser currentUser]];
Again... please excuse any syntax errors...
P.S. just to be sure, here's a working Java code snippet I use in my app:
ParseQuery<ParseObject> query = ParseQuery.getQuery("Requests");
query.whereEqualTo("recipients", ParseUser.getCurrentUser());