barely working example with Isar

lib/example_data.dart

@@ -1,5 +1,6 @@
 import 'package:rezepte/models/difficulty.dart';
 import 'package:rezepte/models/unit.dart';
+import 'package:rezepte/services/providers/db/dbhelper.dart';
 
 import 'models/ingredient.dart';
 import 'constants.dart' as constants;
@@ -30,10 +31,12 @@ final List<Ingredient> exampleIngredients = [
 
 final List<Recipe> exampleRecipes = [
   Recipe(
+      id: DbHelper.nextRecipeId,
       title: 'Wraps',
       description: 'Nur ein paar Wraps',
       difficulty: Difficulty.hard),
   Recipe(
+      id: DbHelper.nextRecipeId,
       title: 'Burritos',
       description: 'Nur ein paar Burritos',
       difficulty: Difficulty.easy),

lib/models/cooking_step.dart

@@ -1,3 +1,8 @@
+import 'package:isar/isar.dart';
+
+part 'cooking_step.g.dart';
+
+@embedded
 class CookingStep {
   final String title;
   final String description;

lib/models/difficulty.dart

@@ -21,4 +21,4 @@ class DifficultyUtil {
 }
 
 // Only use camelCase or UpperCamelCase for names
-enum Difficulty { veryEasy, easy, intermediate, hard, veryHard }
+enum Difficulty { notSelected, veryEasy, easy, intermediate, hard, veryHard }

lib/models/ingredient.dart

@@ -1,5 +1,10 @@
+import 'package:isar/isar.dart';
+
 import 'unit.dart';
 
+part 'ingredient.g.dart';
+
+@embedded
 class Ingredient {
   final String title;
   List<Unit> possibleUnits;

lib/models/ingredient_list_entry.dart

@@ -1,6 +1,11 @@
+import 'package:isar/isar.dart';
+
 import 'ingredient.dart';
 import 'unit.dart';
 
+part 'ingredient_list_entry.g.dart';
+
+@embedded
 class IngredientListEntry {
   final Ingredient ingredient;
   final int amount;

lib/models/recipe.dart

@@ -1,35 +1,46 @@
+import 'package:isar/isar.dart';
+import 'package:rezepte/models/ingredient.dart';
+import 'package:rezepte/models/unit.dart';
+
 import 'difficulty.dart';
 import 'cooking_step.dart';
 import 'ingredient_list_entry.dart';
 
+part 'recipe.g.dart';
+
+@collection
 class Recipe {
+  final int id;
   String title;
   String description;
-  Difficulty? difficulty;
+  Difficulty difficulty;
   List<IngredientListEntry> ingredients = [];
   List<CookingStep> steps = [];
 
   Recipe({
+    required this.id,
     required this.title,
     this.description = '',
-    this.difficulty,
+    this.difficulty = Difficulty.notSelected,
   });
 
   factory Recipe.fromJson(json) => Recipe(
+        id: json['id'] as int,
         title: json['title'] as String,
         description: json['description'] as String,
-        // difficulty: json['difficulty'] as Difficulty?,
-      );
-  // ..ingredients = _ingredientsFromMap(
-  //     json['ingredients'] as List<Map<String, dynamic>>)
-  // ..steps = _stepsFromMap(json['steps']);
+        difficulty: json['difficulty'] as Difficulty,
+      )
+        ..ingredients = _ingredientsFromMap(
+            json['ingredients'] as List<Map<String, dynamic>>)
+        ..steps = _stepsFromMap(json['steps']);
 
   Map<String, dynamic> toJson() => {
+        'id': id,
         'title': title,
         'description': description,
-        // 'difficulty': difficulty,
-        // 'ingredients': ingredients.map((e) => e.toJson()).toList(),
-        // 'steps': steps.map((e) => e.toJson()).toList(),
+        'difficulty': difficulty,
+        'ingredients': ingredients.map((e) => e.toJson()).toList(),
+        'steps': steps.map((e) => e.toJson()).toList(),
       };
 
   void addIngredient(IngredientListEntry ingredient) =>
@@ -52,7 +63,7 @@ class Recipe {
   bool get isEmpty {
     return title.isEmpty &&
         description.isEmpty &&
-        difficulty == null &&
+        difficulty == Difficulty.notSelected &&
         ingredients.isEmpty &&
         steps.isEmpty;
   }
@@ -64,7 +75,7 @@ class Recipe {
   void clear() {
     title = '';
     description = '';
-    difficulty = null;
+    difficulty = Difficulty.notSelected;
     ingredients.clear();
     steps.clear();
   }

lib/models/unit.dart

@@ -1,3 +1,8 @@
+import 'package:isar/isar.dart';
+
+part 'unit.g.dart';
+
+@embedded
 class Unit {
   final String name;
   final UnitType type;

lib/pages/create_recipe_page.dart

@@ -76,9 +76,10 @@ class _CreateRecipeState extends State<CreateRecipe> {
                   style: TextStyle(
                       color: Theme.of(context).colorScheme.onBackground),
                 ),
-                DropdownMenu<Difficulty?>(
+                DropdownMenu<Difficulty>(
                   dropdownMenuEntries: DifficultyUtil.getDropdownList(),
-                  onSelected: (value) => recipe.difficulty = value,
+                  onSelected: (value) =>
+                      recipe.difficulty = value ?? Difficulty.notSelected,
                   label: const Text('Difficulty'),
                   textStyle: TextStyle(
                       color: Theme.of(context).colorScheme.onBackground),

lib/services/providers/db/dbhelper.dart

@@ -1,29 +1,36 @@
-import 'package:hive/hive.dart';
-import 'package:path_provider/path_provider.dart';
+import 'dart:io';
 
+import 'package:flutter/foundation.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:isar/isar.dart';
 import '../../../models/recipe.dart';
 import '../../../example_data.dart' as e;
 
 class DbHelper {
-  static Box<Recipe> get _recipesBox => Hive.box(name: 'recipes');
+  static late Directory _dir;
+  static Isar get _isar => Isar.open(
+        schemas: _schemas,
+        directory: _dir.path,
+      );
+
+  static const List<IsarGeneratedSchema> _schemas = [
+    RecipeSchema,
+  ];
+  static int get nextRecipeId => _isar.recipes.autoIncrement();
 
   static Future<void> init() async {
-    final dir = await getApplicationDocumentsDirectory();
-    Hive.defaultDirectory = dir.path;
-    Hive.registerAdapter('Recipe', Recipe.fromJson);
-    _recipesBox.clear();
-    for (final recipe in e.exampleRecipes) {
-      insertRecipe(recipe);
+    _dir = await getApplicationDocumentsDirectory();
+
+    if (kDebugMode) {
+      _isar.write((isar) => _isar.recipes.putAll(e.exampleRecipes));
     }
   }
 
   static List<Recipe> fetchRecipes() {
-    List<Recipe> recipes = _recipesBox.getAll(['0', '1']).cast<Recipe>();
-
-    return recipes;
-  }
-
-  static void insertRecipe(Recipe recipe) {
-    _recipesBox.put(_recipesBox.length.toString(), recipe);
+    return _isar.recipes
+        .getAll([1, 2])
+        .where((element) => element != null)
+        .cast<Recipe>()
+        .toList();
   }
 }

lib/services/providers/recipe_list_provider.dart

@@ -13,7 +13,7 @@ class RecipeListProvider extends ChangeNotifier {
     notifyListeners();
   }
 
-  List<Recipe> get recipes => DbHelper.fetchRecipes();
+  List<Recipe> get recipes => DbHelper.fetchRecipes(); // _recipes;
 
   void clearRecipes({silent = false}) {
     _recipes.clear();

lib/services/providers/recipe_provider.dart

@@ -5,7 +5,7 @@ import '../../models/recipe.dart';
 class RecipeProvider extends ChangeNotifier {
   Recipe? _recipe;
 
-  Recipe get recipe => _recipe ??= Recipe(title: '');
+  Recipe get recipe => _recipe ??= Recipe(id: 0, title: '');
 
   set recipe(Recipe recipe) {
     _recipe = recipe;