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googlecodelabs / photos-sharing

Code for the "Build a Photo Sharing app with Google Photos and Flutter" codelab
Apache License 2.0
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Getting this error after clicking my google account for signin on the photo-sharing-final code. #2

Closed richardcatlin closed 5 years ago

richardcatlin commented 5 years ago

Unhandled Exception: NoSuchMethodError: The getter 'iterator' was called on null. E/flutter (10059): Receiver: null E/flutter (10059): Tried calling: iterator E/flutter (10059): #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:50:5) E/flutter (10059): #1 ExpandIterator.moveNext (dart:_internal/iterable.dart:481:51) E/flutter (10059): #2 __CompactLinkedHashSet&_HashFieldBase&_HashBase&_OperatorEqualsAndHashCode&SetMixin.addAll (dart:collection/set.dart:57:23) E/flutter (10059): #3 PhotosLibraryApiModel.updateAlbums (package:sharing_codelab/model/photos_library_api_model.dart:173:13) E/flutter (10059): E/flutter (10059): #4 PhotosLibraryApiModel.signIn (package:sharing_codelab/model/photos_library_api_model.dart:70:5) E/flutter (10059): #5 _asyncThenWrapperHelper. (dart:async-patch/async_patch.dart:77:64) E/flutter (10059): #6 _rootRunUnary (dart:async/zone.dart:1132:38) E/flutter (10059): #7 _CustomZone.runUnary (dart:async/zone.dart:1029:19) E/flutter (10059): #8 _FutureListener.handleValue (dart:async/future_impl.dart:126:18) E/flutter (10059): #9 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45) E/flutter (10059): #10 Future._propagateToListeners (dart:async/future_impl.dart:668:32) E/flutter (10059): #11 Future._completeWithValue (dart:async/future_impl.dart:483:5) E/flutter (10059): #12 Future._asyncComplete. (dart:async/future_impl.dart:513:7) E/flutter (10059): #13 _rootRun (dart:async/zone.dart:1124:13) E/flutter (10059): #14 _CustomZone.run (dart:async/zone.dart:1021:19) E/flutter (10059): #15 _CustomZone.runGuarded (dart:async/zone.dart:923:7) E/flutter (10059): #16 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:963:23) E/flutter (10059): #17 _microtaskLoop (dart:async/schedule_microtask.dart:41:21) E/flutter (10059): #18 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5) E/flutter (10059):

jfschmakeit commented 5 years ago

This error occurs because your account does not have any (shared) albums.

The fix is to check for null when updating the albums in updateAlbums (lib/model/photos_library_api_model.dart:156). I'll submit a fix for this shortly.