如何在构建angular应用时修复“模式验证错误”

Question

我目前使用的是angular 7.1，每当我运行ng build来构建项目时，我都会得到一个模式验证错误。求求你我需要帮助

运行ng服务可以完美地工作，没有任何问题。

下面是错误日志

  Data path ".builders['app-shell']" should have required property 'class'.
Error: Schema validation failed with the following errors:
  Data path ".builders['app-shell']" should have required property 'class'.
    at MergeMapSubscriber._registry.compile.pipe.operators_1.concatMap.validatorResult [as project] F:\sageProjects\myriad-app\node_modules\@angular-devkit\core\src\workspace\workspace.js:215:42)
    at MergeMapSubscriber._tryNext F:\sageProjects\myriad-app\node_modules\rxjs\internal\operators\mergeMap.js:69:27)
    at MergeMapSubscriber._next F:\sageProjects\myriad-app\node_modules\rxjs\internal\operators\mergeMap.js:59:18)
    at MergeMapSubscriber.Subscriber.next F:\sageProjects\myriad-app\node_modules\rxjs\internal\Subscriber.js:67:18)
    at MergeMapSubscriber.notifyNext F:\sageProjects\myriad-app\node_modules\rxjs\internal\operators\mergeMap.js:92:26)
    at InnerSubscriber._next F:\sageProjects\myriad-app\node_modules\rxjs\internal\InnerSubscriber.js:28:21)
    at InnerSubscriber.Subscriber.next F:\sageProjects\myriad-app\node_modules\rxjs\internal\Subscriber.js:67:18)
    at MapSubscriber._next (F:\sageProjects\myriad-app\node**strong text**_modules\rxjs\internal\operators\map.js:55:26)
    at MapSubscriber.Subscriber.next (F:\sageProjects\myriad-app\node_modules\rxjs\internal\Subscriber.js:67:18)
    at SwitchMapSubscriber.notifyNext (F:\sageProjects\myriad-app\node_modules\rxjs\internal\operators\switchMap.js:86:26)

Answer 1

尝试更新package.json文件，以便"@angular-devkit/build-angular": "^0.800.1"读取"@angular-devkit/build-angular": "^0.12.4"

然后在命令行中运行npm install。

Answer 2

谢天谢地，我通过执行以下操作解决了这个问题：

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• 在我的项目文件夹上，我右键单击并转到属性以取消选中
• 下载的只读属性，并从https://ejs.org/en/download/current/
• 安装nodejs我使用ng update @angular/cli @angular/core

更新了angular

• 运行npm install如果您遇到与我一样的错误，系统将提示您运行nodejs

• 最后我运行了ng build，它没有出现错误/。windows powershell NB:我以administrator

的身份使用执行了所有命令