Question

当我尝试通过运行npm install --save @angular/material @angular/cdk将材质库添加到我的角项目时，我遇到了此问题中描述的问题：Error TS2315: Type 'ElementRef' is not generic material angular

所以按照那里的建议，我跑了npm install -g @angular/cli@latest;现在，所有ng命令都会产生以下结果：

$ ng Unknown error: Error: schema with key or id "http://json-schema.org/draft-06/schema" already exists

ng可以从其他文件夹中运行，所以我想现在项目中的某些内容已被破坏。如何解决这个问题？

搜索此错误消息并没有产生任何有用的信息，项目的json文件（如tsconfig.json）看起来都很好。

的package.json：

{
  "name": "some-frontend",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "6.0.1",
    "@angular/cdk": "^6.0.1",
    "@angular/common": "6.0.1",
    "@angular/compiler": "6.0.1",
    "@angular/core": "6.0.1",
    "@angular/forms": "6.0.1",
    "@angular/http": "6.0.1",
    "@angular/material": "^6.0.1",
    "@angular/platform-browser": "6.0.1",
    "@angular/platform-browser-dynamic": "6.0.1",
    "@angular/router": "6.0.1",
    "core-js": "^2.4.1",
    "npm": "^6.0.1",
    "rxjs": "^6.1.0",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular/cli": "6.0.1",
    "@angular/compiler-cli": "6.0.1",
    "@angular/language-service": "6.0.1",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "2.7.2"
  }
}

以前的package.json文件：

{
  "name": "some-frontend",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^5.2.0",
    "@angular/common": "^5.2.0",
    "@angular/compiler": "^5.2.0",
    "@angular/core": "^5.2.0",
    "@angular/forms": "^5.2.0",
    "@angular/http": "^5.2.0",
    "@angular/platform-browser": "^5.2.0",
    "@angular/platform-browser-dynamic": "^5.2.0",
    "@angular/router": "^5.2.0",
    "core-js": "^2.4.1",
    "rxjs": "^5.5.6",
    "zone.js": "^0.8.19"
  },
  "devDependencies": {
    "@angular/cli": "~1.7.4",
    "@angular/compiler-cli": "^5.2.0",
    "@angular/language-service": "^5.2.0",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "~2.5.3"
  }
}

Answer 1

rm -rf /node_modules

，然后通过

再次安装软件包

npm install

为我工作。

ng：带有键或ID的架构“http://json-schema.org/draft-06/schema”已存在

1 个答案: