flutterobjectboxbuild-runner

Flutter Objectbox build_runner build exiting with code 78

I'm writing my first flutter app. I've defined the models with objectbox and now I'm trying to build objectbox codes by running flutter pub run build_runner build. And here's the output I get:

[INFO] Generating build script...
[INFO] Generating build script completed, took 484ms

[INFO] Precompiling build script......
[WARNING] ../../../../.pub-cache/hosted/pub.dev/objectbox_generator-2.0.0/lib/src/entity_resolver.dart:67:41: Error: The getter 'element' isn't defined for the class 'DartType'.
 - 'DartType' is from 'package:analyzer/dart/element/type.dart' ('../../../../.pub-cache/hosted/pub.dev/analyzer-5.1.0/lib/dart/element/type.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'element'.
            : entityRealClass.typeValue.element!.name!,
                                        ^^^^^^^
../../../../.pub-cache/hosted/pub.dev/objectbox_generator-2.0.0/lib/src/entity_resolver.dart:158:64: Error: The getter 'element' isn't defined for the class 'DartType'.
 - 'DartType' is from 'package:analyzer/dart/element/type.dart' ('../../../../.pub-cache/hosted/pub.dev/analyzer-5.1.0/lib/dart/element/type.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'element'.
        } else if (['Int8List', 'Uint8List'].contains(dartType.element!.name)) {
                                                               ^^^^^^^
../../../../.pub-cache/hosted/pub.dev/objectbox_generator-2.0.0/lib/src/entity_resolver.dart:160:29: Error: The getter 'element' isn't defined for the class 'DartType'.
 - 'DartType' is from 'package:analyzer/dart/element/type.dart' ('../../../../.pub-cache/hosted/pub.dev/analyzer-5.1.0/lib/dart/element/type.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'element'.
        } else if (dartType.element!.name == 'DateTime') {
                            ^^^^^^^
../../../../.pub-cache/hosted/pub.dev/objectbox_generator-2.0.0/lib/src/entity_resolver.dart:186:60: Error: The getter 'element' isn't defined for the class 'DartType'.
 - 'DartType' is from 'package:analyzer/dart/element/type.dart' ('../../../../.pub-cache/hosted/pub.dev/analyzer-5.1.0/lib/dart/element/type.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'element'.
            (f.type as ParameterizedType).typeArguments[0].element!.name;
                                                           ^^^^^^^
../../../../.pub-cache/hosted/pub.dev/objectbox_generator-2.0.0/lib/src/entity_resolver.dart:233:20: Error: The getter 'element' isn't defined for the class 'DartType'.
 - 'DartType' is from 'package:analyzer/dart/element/type.dart' ('../../../../.pub-cache/hosted/pub.dev/analyzer-5.1.0/lib/dart/element/type.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'element'.
            f.type.element!.name! + (isNullable(f.type) ? '?' : '');
                   ^^^^^^^
../../../../.pub-cache/hosted/pub.dev/objectbox_generator-2.0.0/lib/src/entity_resolver.dart:416:12: Error: The getter 'element' isn't defined for the class 'InterfaceType'.
 - 'InterfaceType' is from 'package:analyzer/dart/element/type.dart' ('../../../../.pub-cache/hosted/pub.dev/analyzer-5.1.0/lib/dart/element/type.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'element'.
          .element
           ^^^^^^^
../../../../.pub-cache/hosted/pub.dev/objectbox_generator-2.0.0/lib/src/entity_resolver.dart:449:55: Error: The getter 'element' isn't defined for the class 'DartType'.
 - 'DartType' is from 'package:analyzer/dart/element/type.dart' ('../../../../.pub-cache/hosted/pub.dev/analyzer-5.1.0/lib/dart/element/type.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'element'.
  bool isToOneRelationField(FieldElement f) => f.type.element!.name == 'ToOne';
                                                      ^^^^^^^
../../../../.pub-cache/hosted/pub.dev/objectbox_generator-2.0.0/lib/src/entity_resolver.dart:452:14: Error: The getter 'element' isn't defined for the class 'DartType'.
 - 'DartType' is from 'package:analyzer/dart/element/type.dart' ('../../../../.pub-cache/hosted/pub.dev/analyzer-5.1.0/lib/dart/element/type.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'element'.
      f.type.element!.name == 'ToMany';
             ^^^^^^^
[INFO] Precompiling build script... completed, took 1.5s

[SEVERE] Failed to precompile build script .dart_tool/build/entrypoint/build.dart.
This is likely caused by a misconfigured builder definition.

pub finished with exit code 78

I haven't been able to find a solution online. PLEASE HELP! How can I fix this?

I've upgraded packages with flutter pub upgrade. A few packages updated, but the error is persistent.

Post Update:

This is my models.dart:

import 'package:objectbox/objectbox.dart';
import 'helper.dart';

@Entity()
class Category {
  int id = 0;

  @Index()
  String? name;

  @Backlink('category')
  var tasks = ToMany<Task>();
}

@Entity()
class Task {
  @Id()
  int id = 0;

  String? name;

  @Transient()
  TaskState state = TaskState.newly;

  int get dbState {
    return state.index;
  }

  set dbState(int val) {
    state = TaskState.values[val];
  }

  var category = ToOne<Category>();
}

@Entity()
class Day {
  int id = 0;

  @Index()
  String date = '';

  String gratitudes = '###';
  String journal = '';

  var tasks = ToMany<Task>();
}

This is my pubspec.yaml:

name: quick_planner
description: A new Flutter project.
# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
# In Windows, build-name is used as the major, minor, and patch parts
# of the product and file versions while build-number is used as the build suffix.
version: 1.0.0+1

environment:
  sdk: '>=2.19.4 <3.0.0'

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
  flutter:
    sdk: flutter


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2
  format: ^1.2.0
  system_theme: ^2.1.0
  objectbox: ^2.0.0
  objectbox_flutter_libs: any

dev_dependencies:
  flutter_test:
    sdk: flutter

  # The "flutter_lints" package below contains a set of recommended lints to
  # encourage good coding practices. The lint set provided by the package is
  # activated in the `analysis_options.yaml` file located at the root of your
  # package. See that file for information about deactivating specific lint
  # rules and activating additional ones.
  flutter_lints: ^2.0.0
  build_runner: ^2.3.3
  objectbox_generator: any

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter packages.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #   - images/a_dot_burr.jpeg
  #   - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  fonts:
    - family: comfortaa
      fonts:
        - asset: fonts/comfortaa.ttf
  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages
Solution

  • The analyzer package version used (5.1.0) is missing the DartType.element method. It was fixed with 5.2.0.

    Try to run flutter pub upgrade to use the latest possible version.

    If that won't work, use flutter pub outdated to see what is preventing it from using a newer version.