Display (All) Data from two classes on Parse.com in UITableView - ios

Question

I want to be able to display all of the data from two classes from Parse.com but it is not working. Every time I go to open the tableview the app crashes. Here is my code. I used the guidance from https://www.parse.com/questions/query-with-two-classes to aid me.
- (id)initWithStyle:(UITableViewStyle)style {
self = [super initWithStyle:style];
if (self) {
// This table displays items in the class
self.parseClassName = #"rep";
self.parseClassName = #"rep2";
self.pullToRefreshEnabled = YES;
self.paginationEnabled = NO;
self.objectsPerPage = 100;
}
return self;
}
- (PFQuery *)queryForTable {
PFQuery *1query = [PFQuery queryWithClassName:#"rep"];
PFQuery *2query = [PFQuery queryWithClassName:#"rep2"];
PFQuery *query = [PFQuery orQueryWithSubqueries:#[1query,2query]];
[query whereKey:#"user" equalTo:[PFUser currentUser]];
[query findObjectsInBackgroundWithBlock:^(NSArray *results, NSError *error) {
}];
return query;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
object:(PFObject *)object {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:CellIdentifier];
}
// Configure the cell to show todo item with a priority at the bottom
cell.textLabel.text = [object objectForKey:#"name"];
cell.detailTextLabel.text = [NSString stringWithFormat:#"Username: %#",
[object objectForKey:#"username"]];
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
// Remove the row from data model
PFObject *objectToDel = [self.objects objectAtIndex:indexPath.row];
[objectToDel deleteInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
UIAlertView *Alert = [[UIAlertView alloc] initWithTitle:#"Item Was Deleted Successfully. Pull Down to Refresh Tab" message:nil delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil, nil];
[Alert show];
}
];
}
#end
> Specwatch[668:192464] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'All sub queries of an
> `or` query should be on the same class.'
> *** First throw call stack:
> (0x182319900 0x181987f80 0x182319848 0x1000bd8b4 0x100025c10 0x100072514 0x100071e00 0x18700c0c0 0x1870cbda8 0x1870cbc80
> 0x1870caec8 0x1870caa6c 0x1870ca694 0x1870ca5fc 0x187007778
> 0x184a16b2c 0x184a11738 0x184a115f8 0x184a10c94 0x184a109dc
> 0x184a0a0cc 0x1822d0588 0x1822ce32c 0x1822ce75c 0x1821fd680
> 0x18370c088 0x187074d90 0x10006d054 0x181d9e8b8)
> libc++abi.dylib: terminating with uncaught exception of type NSException
> (lldb)

Answer 1

I'll try to summarize how to go about emancipating yourself from the PFQueryTableViewController (and UITableViewController for that matter. The world would be a slightly happier place if neither of these classes had been invented (imo)). Create a UIViewController subclass called ViewController.
In IB, add a UIViewController (setting its class to ViewController), give it a UITableView constrained to the edges of the view. Hook up the datasource, delegate and an outlet called tableView. Add a prototype cell. For now, just use a standard subtitle or left detail UITableViewCell. Give the cell an identifier of #"cell".
// viewcontroller.m
#interface ViewController () <UITableViewDataSource, UITableViewDelegate>
#property(weak,nonatomic) IBOutlet UITableView *tableView;
#property(strong,nonatomic) NSMutableArray *objects;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[PFCloud callFunctionInBackground:#"getTwoClasses" withParameters:nil block:^(NSArray *objects, NSError *error) {
self.objects = objects;
[self.tableView reloadData];
}];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.objects.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell" forIndexPath:indexPath];
PFObject *object = self.objects[indexPath.row];
cell.textLabel.text = [object objectId];
cell.detailTextLabel.text = [object parseClassName];
return cell;
}
That very simple implementation should be all that's needed on the client. On the server, we just need a cloud function called "getTwoClasses" to get objects from two classes (rep and rep2).
Deploy this function to do that...
Parse.Cloud.define("getTwoClasses", function(request, response) {
var reps;
var user = request.user;
var repQuery = new Parse.Query("rep");
repQuery.equalTo("user", user);
query.find().then(function(result) {
reps = result;
var rep2Query = new Parse.Query("rep2");
rep2Query.equalTo("user", user);
return rep2Query.find();
}).then(function(result) {
response.success(reps.concat(result));
}, function(error) {
response.error(error);
});
});