Angular 4，angularfire2，元数据版本不匹配

Question

出现以下错误

Metadata version mismatch for module c:/..../node_modules/angularfire2/index.d.ts, found version4, expected 3.

如果我去查看我的package.json，我的 angularfire2 版本为 5.0.0-rc.4，firebase 版本为 4.6.2。 see screenshot for details

我尝试将 angularfire2 和 firebase 的版本更改为以前的版本，但没有任何效果。

有什么建议吗？ 谢谢。

{
  "name": "twitter-revamped",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^4.2.4",
    "@angular/common": "^4.2.4",
    "@angular/compiler": "^4.2.4",
    "@angular/core": "^4.2.4",
    "@angular/forms": "^4.2.4",
    "@angular/http": "^4.2.4",
    "@angular/platform-browser": "^4.2.4",
    "@angular/platform-browser-dynamic": "^4.2.4",
    "@angular/router": "^4.2.4",
    "angularfire2": "^5.0.0-rc.4",
    "core-js": "^2.4.1",
    "firebase": "^4.6.2",
    "ng2-semantic-ui": "^0.9.6",
    "rxjs": "<5.4.2",
    "zone.js": "^0.8.14"
  },
  "devDependencies": {
    "@angular/cli": "1.4.7",
    "@angular/compiler-cli": "^4.2.4",
    "@angular/language-service": "^4.2.4",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "~3.2.0",
    "jasmine-core": "~2.6.2",
    "jasmine-spec-reporter": "~4.1.0",
    "karma": "~1.7.0",
    "karma-chrome-launcher": "~2.1.1",
    "karma-cli": "~1.0.1",
    "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": "~3.2.0",
    "tslint": "~5.7.0",
    "typescript": "~2.3.3"
  }
}

Answer 1

我尝试了上述解决方案，但没有解决我的问题。我尝试了以下步骤，它解决了我的问题。

问题实际上发生在 npm install angularfire2 firebase --save 命令运行时。 package.json 中添加了以下依赖

"angularfire2": "^5.0.0-rc.4",
"firebase": "^4.7.0"

这里的实际问题是由于 angularfire2 的版本。我们需要 angularfire2": "^5.0.0-rc.3 而不是 angularfire2": "^5.0.0-rc.4。我不知道为什么这个版本有问题。

解析步骤如下:

第 1 步:卸载 angularfire2 和 firebase

npm uninstall angularfire2 firebase --save

第二步:安装angularfire2 5.0.0-rc.3版本

npm install angularfire2@5.0.0-rc.3 --save

第 3 步:安装 firebase

npm install firebase --save

第四步:检查package.json中添加的依赖

"angularfire2": "^5.0.0-rc.3",
"firebase": "^4.7.0"

第 5 步:执行 ng serve

ng serve

这解决了问题并且应用程序编译成功。