fix: cannot use ref before provider rebuilt

designer_v2/lib/features/study/study_test_controller.dart

@@ -16,14 +16,17 @@ part 'study_test_controller.g.dart';
 class StudyTestController extends _$StudyTestController {
   @override
   StudyTestControllerState build(StudyID studyId) {
+    // final studyRepo = ref.read(studyRepositoryProvider);
     ref.onDispose(() {
       // Reload the study after disposing the test controller so that any
       // data changes resulting from testing are reflected in the study for
       // other parts of the app (e.g. test data that was generated)
       //
       // Ideally, we would stream changes from the backend/database directly,
-      // but this is a sufficient workaround for now
-      ref.watch(studyRepositoryProvider).fetch(studyId);
+      // but this is a sufficient workaround for now.
+
+      // TODO test if this is needed or the study gets already updated after closing the test view
+      // studyRepo.fetch(studyId);
     });
     return StudyTestControllerState(
       studyId: studyId,
@@ -40,7 +43,6 @@ class StudyTestController extends _$StudyTestController {
 }
 
 /// Provide a controller parametrized by [StudyID]
-
 @riverpod
 PlatformController studyTestPlatformController(
   StudyTestPlatformControllerRef ref,

designer_v2/lib/features/study/study_test_frame.dart

@@ -37,22 +37,15 @@ class PreviewFrame extends ConsumerStatefulWidget {
 class _PreviewFrameState extends ConsumerState<PreviewFrame> {
   PlatformController? frameController;
 
-  @override
-  void initState() {
-    super.initState();
-    runAsync(() => _subscribeStudyChanges());
-  }
-
   @override
   void didUpdateWidget(PreviewFrame oldWidget) {
-    if (mounted) runAsync(() => _subscribeStudyChanges());
     super.didUpdateWidget(oldWidget);
-  }
-
-  void _subscribeStudyChanges() {
     final formViewModelCurrent =
         ref.read(studyFormViewModelProvider(widget.studyId));
+    runAsync(() => _subscribeStudyChanges(formViewModelCurrent));
+  }
 
+  void _subscribeStudyChanges(StudyFormViewModel formViewModelCurrent) {
     formViewModelCurrent.form.valueChanges.listen((event) {
       if (frameController != null) {
         final formJson =
@@ -92,9 +85,9 @@ class _PreviewFrameState extends ConsumerState<PreviewFrame> {
     final state = ref.watch(studyTestControllerProvider(widget.studyId));
     final formViewModel = ref.watch(studyTestValidatorProvider(widget.studyId));
 
-    // Rebuild iframe component & url
+    // Rebuild iframe component and url
     frameController =
-        ref.read(studyTestPlatformControllerProvider(widget.studyId));
+        ref.watch(studyTestPlatformControllerProvider(widget.studyId));
     _updatePreviewRoute();
     frameController!.activate();
     frameController!.listen();