parse-server: Relational query returns 0 object on iOS SDK

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Environment Setup

Ubuntu 14.04 64 bit Parse-Server 2.1.6

Steps to reproduce

I’m doing relational query to get opening hours of a restaurant where restaurant name matches certain keywords. When I’m querying it on my iOS app, it returns 0 object.

PFQuery *restaurantQuery = [PFQuery queryWithClassName:@"Restaurant"];
    [restaurantQuery whereKey:@"name" equalTo:self.selectedRestaurantName];

    PFQuery *hoursQuery = [PFQuery queryWithClassName:@"Hour"];
    [hoursQuery whereKey:@"restaurant" matchesKey:@"objectId" inQuery:restaurantQuery];
    [hoursQuery whereKey:@"days" equalTo:[NSString stringWithFormat:@"%ld", (long)[Utility getWeekday]]];

    [hoursQuery findObjectsInBackgroundWithBlock:^(NSArray * _Nullable objects, NSError * _Nullable error) {
        if (!error) {
            self.restaurantHours = [[NSArray alloc] initWithArray:objects];
        } else {
            NSLog(@"%@", error);
            self.restaurantHours = [[NSArray alloc] init];
        }

        [self.tableView reloadData];
    }];

But when I tried to query it using cURL, it returns the result that I needed.

curl -X GET -H "X-Parse-Application-Id: myAppID" -H "X-Parse-REST-API-Key: myRESTKey" -G --data-urlencode 'where={"restaurant":{"$inQuery":{"where":{"name":"selectedRestaurantName"},"className":"Restaurant"}},"days":"3"}' https://my_url.com:1337/parse/classes/myClass