Get All the Users

General
1

I’m trying to get a list of all the users to a macOS app using Swift 3. But for some reason it’s not working. I use the same code for one of my own classes.

users is an Array of BackendlessUser







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 func getUsers() {

        if users.count > 0 {

            users.removeAll()

        }

        

        let dataStore = backendless!.data.of(BackendlessUser.ofClass())

        

        dataStore?.find(

            { (result: BackendlessCollection?) -> Void in

                let data = result?.getCurrentPage()

                

                for obj in data! {

                    let item = obj as! BackendlessUser

                    self.users.append(item)

                }

                

                debugPrint("Users are loaded: \(self.users.count) items")

                //                self.tableView.reloadData()

        },

            error:  {(fault: Fault?) -> Void in

                debugPrint("Server reported an error: \(String(describing: fault))")

        })

    }
2

Hello,

Could you please describe “it is not working” in greater details? Such as: are you getting an error? If not, are you getting any users back? How many are in the database? How many are returned?

Mark

3

Hi Mark.

It goes directly to ‘error’ but doesn’t show any error code.
There are only about 5 records and no one show.

Following https://backendless.com/feature-52-fetching-applications-user-objects/ doesn’t work either in Swift.

4

In the code in the screen shot, neither of the print statement get called.

Screen Shot 2017-06-19 at 08.28.29.png
Screen Shot 2017-06-19 at 08.28.29.png702×196 21 KB

5

Hi Jorgen,

please try this snippet:

backendless.persistenceService.of(BackendlessUser.ofClass()).find(
            { (users : BackendlessCollection!) -> () in
                print("Users have been fetched  (ASYNC): \(users)")
        },
            error: { (fault : Fault!) -> () in
                print("Server reported an error (ASYNC): \(fault)")
        })

Please let us know about the result.

Regards,
Stanislaw

6

Hi Stanislaw,

I , unfortunately, get the same problem.
Without calling the func, the app starts up fine and presents the main screen.
If I call it, either in viewDidLoad or viewDidAppear, the app crashes.

As you can see from the screenshot, the function is not hooked up to anything on the screen yet. I was just trying to get a result from it first.

Pod file:

Pods for BF4L Coach

pod ‘Backendless-osx-SDK’

Crash log;

2017-06-19 10:23:44.065107+0100 BF4L Coach[83468:4207357] *** Terminating app due to uncaught exception ‘NSRangeException’, reason: ‘*** -[__NSArray0 objectAtIndex:]: index 3 beyond bounds for empty NSArray’

*** First throw call stack:

(

0 CoreFoundation 0x00007fffa6bb72cb __exceptionPreprocess + 171

1 libobjc.A.dylib 0x00007fffbb9c248d objc_exception_throw + 48

2 CoreFoundation 0x00007fffa6bd223d -[__NSArray0 objectAtIndex:] + 93

3 BF4L Coach 0x00000001000853f0 -[BackendlessCache invokeAsync:method:args:responder:] + 124

4 BF4L Coach 0x00000001000123e2 TFC10BF4L_Coach6MainVC18fetchingUsersAsyncfT_T + 834

5 BF4L Coach 0x00000001000118af TFC10BF4L_Coach6MainVC13viewDidAppearfT_T + 31

6 BF4L Coach 0x00000001000118e2 TToFC10BF4L_Coach6MainVC13viewDidAppearfT_T + 34

7 AppKit 0x00007fffa4766264 -[NSViewController _sendViewDidAppear] + 41

8 AppKit 0x00007fffa4765f5b -[NSView(NSInternal) _windowDidOrderOnScreen] + 67

9 AppKit 0x00007fffa476600e -[NSView(NSInternal) _windowDidOrderOnScreen] + 246

10 AppKit 0x00007fffa4ecaa38 -[NSWindow _reallyDoOrderWindowAboveOrBelow:relativeTo:findKey:forCounter:force:isModal:] + 2532

11 AppKit 0x00007fffa47626ce -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 1041

12 AppKit 0x00007fffa4762263 -[NSWindow orderWindow:relativeTo:] + 153

13 AppKit 0x00007fffa4814bab -[NSWindow makeKeyAndOrderFront:] + 111

14 QuickLookUI 0x00007fffac5e6519 -[QLSeamlessDocumentOpener showWindow:contentFrame:withBlock:] + 108

15 AppKit 0x00007fffa4813d37 -[NSWindowController showWindow:] + 689

16 AppKit 0x00007fffa45e6d2e NSApplicationMain + 1013

17 BF4L Coach 0x00000001000156cd main + 13

18 libdyld.dylib 0x00007fffbc2a7235 start + 1

)

libc++abi.dylib: terminating with uncaught exception of type NSException

(lldb)

Screen Shot 2017-06-19 at 10.20.18.png

7

Hello Jorgen,

Could you please provide us your simplified Xcode test project so we could check this issue?

Regards, Olga

8

Hi Olga,

I moved the function to the Appdelegate and called it in applicationDidFinishLaunching, and there it works fine. Why it wouldn’t work in the view controller is mystery to me.
I have called other fetches from other viewcontrollers with no problem at all.

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9

Can we mark this topic as resolved?

10

Yea, I can’t see that it any fault from Backendless side.

Just slightly stumped why it’s happening at all.