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我通过迁移到 null-safety 犯了一个错误，然后一切都变成了错误，在修复了很多错误之后，我仍然得到一个错误，错误是：

[INFO] Generating build script...
[INFO] Generating build script completed, took 452ms

[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 131ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 791ms

[INFO] Running build...
[INFO] Running build completed, took 30ms

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 79ms

[SEVERE] json_serializable:json_serializable on lib/injection.config.dart (cached):

This builder requires Dart inputs without syntax errors.
However, package:invoice_app/injection.config.dart (or an existing part) contains the following errors.
injection.config.dart:18:48: This requires the 'non-nullable' language feature to be enabled.
injection.config.dart:18:12: This requires the 'non-nullable' language feature to be enabled.

Try fixing the errors and re-running the build.

[SEVERE] Failed after 123ms
pub finished with exit code 1
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1 回答 1

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看起来可注射生成器与新版本的 dart 有一些混淆，这就是为什么当我生成新injection.config.dart文件时它会给出这个错误

injection.config.dart:18:12：这需要启用“不可为空”语言功能。

因此，如果您想修复它，只需打开文件，然后?从中删除标记

_i1.GetIt $initGetIt(_i1.GetIt get,
    {String? environment, _i2.EnvironmentFilter? environmentFilter}) {
  final gh = _i2.GetItHelper(get, environment, environmentFilter);
  return get;
}

对此

_i1.GetIt $initGetIt(_i1.GetIt get,
    {String environment, _i2.EnvironmentFilter environmentFilter}) {
  final gh = _i2.GetItHelper(get, environment, environmentFilter);
  return get;
}

我知道这不是一个解决方案，但它一直有效，直到我将迁移到不可为空，我将使用它。

于 2021-04-02T21:50:26.540 回答