1

使用以下命令将我的Angular2项目升级到Angular4后：

npm install @angular/common@latest @angular/compiler@latest @angular/compiler-cli@latest @angular/core@latest @angular/forms@latest @angular/http@latest @angular/platform-browser@latest @angular/platform-browser-dynamic@latest @angular/platform-server@latest @angular/router@latest @angular/animations@latest typescript@latest --save

我在使用时收到以下错误ng build --prod：

ERROR in ./src/main.ts
Module not found: Error: Can't resolve './$$_gendir/app/app.module.ngfactory' in 'D:\workspace\MyProject\src'
 @ ./src/main.ts 4:0-74
 @ multi ./src/main.ts

没有--prod标志，我不会收到任何错误。stackoverflow 上有一些类似的问题，但没有任何可接受的答案，并且与升级到 Angular4 无关。这是我的 package.json：

{
  "name": "MyProject",
  "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": "^4.0.0",
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/platform-server": "^4.0.0",
    "@angular/router": "^4.0.0",
    "angular-2-dropdown-multiselect": "^1.0.5",
    "angular2-uuid": "^1.1.1",
    "bootstrap": "^3.3.7",
    "core-js": "^2.4.1",
    "font-awesome": "^4.7.0",
    "jquery": "^3.1.1",
    "ng2-adal": "^0.3.0",
    "rxjs": "^5.1.0",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "@angular/cli": "1.0.0",
    "@angular/compiler-cli": "^4.0.0",
    "@types/jasmine": "2.5.46",
    "@types/node": "~7.0.11",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "karma": "~1.5.0",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^1.0.0",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "typescript": "^2.2.1",
    "tslint": "~4.5.0"
  }
}

编辑. 这是使用新 CLI创建的project.json ：ng new

{
  "name": "mypro",
  "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/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/router": "^4.0.0",
    "core-js": "^2.4.1",
    "rxjs": "^5.1.0",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "@angular/cli": "1.0.0",
    "@angular/compiler-cli": "^4.0.0",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.5.0",
    "typescript": "~2.2.0"
  }
}

有什么建议么？

4

1 回答 1

8

您可以构建您的应用程序，但您很可能需要包含该--aot false参数--prod才能使其工作。见下文。

ng build --prod --aot false

现在默认的生产构建编译模式是 AOT 编译。您必须在代码中执行一些额外的步骤才能使 AOT 工作，或者通过将标志设置为 false 来避免它。AOT Cookbook应该会有所帮助。

GitHub wiki表明ng build该--aot标志的默认值为 false，但似乎并非如此。ng build --help没有显示有默认值。使用标志显示/证明默认值为真。

当我遇到 AOT 问题时，我通常会收到比您在问题中显示的更好的错误消息；至少是一个组件名称，或者告诉我在哪里看的东西。我最终在错误中看到的许多内容都是诸如未在组件中显式声明变量之类的。JIT 不关心这个，但 AOT 根本不喜欢它。

希望这可以帮助你。

于 2017-03-26T20:07:31.223 回答