Flutter：找不到包“build_runner”

Question

我使用Hive Packages，我在我的项目中实现了模块化。首先，我network使用运行命令创建名称为包的包flutter create --template=package network，我引用了这个。

这个包包括我的项目模型。之后我创建模型用户，然后运行命令构建模型flutter packages pub run build_runner build --delete-conflicting-outputs：

import 'package:hive/hive.dart';

part 'user_model_hive.g.dart';

@HiveType()
class UserModelHive extends HiveObject {
  @HiveField(0) 
  DateTime id;
  @HiveField(1)
  String giverName;
  @HiveField(2)
  String pinCodeNumber;

  UserModelHive({this.id, this.giverName, this.pinCodeNumber});
}

但我得到这样的错误

Could not find package "build_runner". Did you forget to add a dependency? pub finished with exit code 65

我确定已经包含build_runner在我的包中network。

pubspec.yaml

name: network
description: A new Flutter package project.
version: 0.0.1
author:
homepage:

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  hive: ^1.1.1
  hive_flutter: ^0.2.1
dev_dependencies:
  flutter_test:
    sdk: flutter
  hive_generator: ^0.5.2
  build_runner: ^1.7.2

# 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.
flutter:
  # To add assets to your package, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg
  #
  # For details regarding assets in packages, see
  # https://flutter.dev/assets-and-images/#from-packages
  #
  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.
  # To add custom fonts to your package, 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 in packages, see
  # https://flutter.dev/custom-fonts/#from-packages

我已经在使用这个命令，但没有任何反应： flutter packages get&flutter pub get

如果您需要，这是我的结构文件夹。

Answer 1

我也遇到了同样的错误。我已经通过添加build_runnerin dev_depndencies, 在pubspec.yaml文件中解决了这个问题，例如：

dev_dependencies:
    build_runner: ^2.4.6
    mobx_codegen: ^0.3.9

Answer 2

您可以尝试以下代码：

flutter packages pub run build_runner build

Answer 3

正如评论中共享的 GitHub 问题中提到的，该问题是由从不同目录运行应用程序引起的。在本例中，应用程序在发布的问题中以 root 身份运行。通过从 运行应用程序已解决该问题/network。