Add workaround for #722

Author: rolandgeider

lib/models/exercises/exercise.dart

@@ -16,6 +16,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+import 'dart:developer';
+
 import 'package:equatable/equatable.dart';
 import 'package:json_annotation/json_annotation.dart';
 import 'package:wger/helpers/consts.dart';
@@ -160,7 +162,15 @@ class Exercise extends Equatable {
     equipment = baseData.equipment;
     category = baseData.category;
     translations = baseData.translations.map((e) {
-      e.language = languages.firstWhere((l) => l.id == e.languageId);
+      e.language = languages.firstWhere(
+        (l) => l.id == e.languageId,
+
+        // workaround for https://github.com/wger-project/flutter/issues/722
+        orElse: () {
+          log('Could not find language for translation ${e.languageId}');
+          return Language(id: e.languageId, shortName: 'unknown', fullName: 'unknown');
+        },
+      );
       return e;
     }).toList();
     videos = baseData.videos;

lib/providers/exercises.dart

@@ -298,9 +298,17 @@ class ExercisesProvider with ChangeNotifier {
     int exerciseId,
   ) async {
     Exercise exercise;
-    final exerciseDb = await (database.select(database.exercises)
-          ..where((e) => e.id.equals(exerciseId)))
-        .getSingleOrNull();
+
+    // TODO: this should be a .getSingleOrNull()!!! However, for some reason there
+    //       can be duplicates in the db. Perhaps a race condition so that two
+    //       entries are written at the same time or something?
+    final exerciseResult =
+        await (database.select(database.exercises)..where((e) => e.id.equals(exerciseId))).get();
+
+    ExerciseTable? exerciseDb;
+    if (exerciseResult.isNotEmpty) {
+      exerciseDb = exerciseResult.first;
+    }
 
     // Exercise is already known locally
     if (exerciseDb != null) {

pubspec.lock

@@ -1576,4 +1576,4 @@ packages:
     version: "3.1.2"
 sdks:
   dart: ">=3.6.0 <4.0.0"
-  flutter: ">=3.24.0"
+  flutter: ">=3.27.0"