Parse retrieve columns from 2 different objects - ios

Question

I've been using sql forever and i'm now stepping into using parse. I've reach a problem regarding the database structure. i have 2 objects called stores and users. i've added the stores objectId to each user so that i can identify which user is to which store. I do not know if there is another way, but this was what i could think of.
The issue is that i want to retrieve all the users and the store names which is connected to the users. How can achieve this using parse?
My code at the moment.
PFQuery *query = [PFQuery queryWithClassName:#"users"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
for (PFObject *object in objects) {
}
NSLog(#"%#", objects);
} else {
// Log details of the failure
NSLog(#"Error: %# %#", error, [error userInfo]);
}
}];
}

Answer 1

It does sound like the aim is to fetch related objects, but my understanding about how to do that differs from #Dima. You do it like this...
PFQuery *query = [PFQuery queryWithClassName:#"users"];
// this tells the query to eagerly fetch the related store object
[query includeKey:#"store"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
// handle error, or ...
for (PFObject *object in objects) {
// object is from the users table, and object[#"store"] will contain
// the complete, related store object, eagerly fetched...
NSLog(#"the store object for %# is %#", object, object[#"store"]);
}
}];

Answer 2

If I understand correctly, you just want to fetch a related object? The documentation covers this.
You should be able to fetch a related object like this:
PFObject *store = user[#"store"]; // reference to related object but may need to be fetched
[store fetchIfNeededInBackgroundWithBlock:^(PFObject *object, NSError *error) {
// at this point you have fetched the store or you already have it
NSString *name = store[#"name"];
}];