Parse iOS relational query involving Parse User

Question

In my data model, I have a Session class with an 'owner' field that points to a 'User' instance. I'm trying to retrieve all the sessions owned by a given user for whom I only have his objectId. Here is my query:

PFQuery *query = [PFQuery queryWithClassName:@"Session"];
NSString *userId = ...;
[query whereKey:@"owner" equalTo:[PFObject objectWithoutDataWithClassName:@"User" objectId:userId]];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
    //Here objects is always empty, even though I have several sessions whose 'owner' matches userId
}];

Obviously I'm doing something wrong here, but I don't know what. Can you help me?

bobnoble · Accepted Answer · 2014-02-20 09:34:01Z

3

A class with the name User is not the same as a PFUser. Internally I believe parse.com uses _User to refer to a PFUser object. Try changing the line:

[query whereKey:@"owner" equalTo:[PFObject objectWithoutDataWithClassName:@"User" objectId:userId]];

to

[query whereKey:@"owner" equalTo:[PFObject objectWithoutDataWithClassName:@"_User" objectId:userId]];

answered Feb 20, 2014 at 9:34

bobnoble

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2 Comments

Sebastien Over a year ago

Thanks a lot. I wish that were documented somewhere.

emma ray Over a year ago

It's actually visible in the Parse data browser, right beside the column name. Proper documentation would be awesome though.

iAnkit · Accepted Answer · 2014-11-13 07:42:32Z

0

I had same issue and solved it as below

[query whereKey:@"studId" equalTo:[PFObject objectWithoutDataWithClassName:@"_User" objectId:objUser.objectId]];

where studId is field of student class

answered Nov 13, 2014 at 7:42

iAnkit

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Comments

virus · Accepted Answer · 2014-02-20 09:51:04Z

-1

// Just add following code and that will be work and make sure you are passing objectID of user instead of just column name

[query include:@"owner"];

answered Feb 20, 2014 at 9:51

virus

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