更新 Angular 7 -> Angular 8 时出错答案

【问题标题】：Error when updating Angular 7 -> Angular 8更新 Angular 7 -> Angular 8 时出错
【发布时间】：2019-10-27 18:43:44
【问题描述】：

一个月前，我开始了一个 Angular 7 项目。现在我需要将 Angular Material 包含到项目中并 npm i 它。它最近发布的版本 8 似乎与 Angular 7 不兼容。

所以我开始更新 Angular 7 → Angular 8：ng update @angular/cli @angular/core。这给了我一个错误：

$ng update @angular/cli @angular/core

Package "@ngrx/core" has an incompatible peer dependency to "rxjs" (requires "^5.0.0-beta.12", would install "6.5.2").

Incompatible peer dependencies found. See above.

在本指南https://update.angular.io/#7.0:8.0 我发现：

“一旦你和你所有的依赖都更新到 RxJS 6，删除 rxjs-compat。”

我应该在 rxjs^6。我需要rxjs-compat 才能使用由https://github.com/swagger-api/swagger-codegen 生成的swagger client。我试图从 package.json 中删除 "rxjs-compat": "^6.5.2"，但没有成功。

package.json：

{
  "name": "fem",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "$(npm bin)/cypress open",
    "e2e-protractor": "ng e2e",
    "swagger-generate": "swagger-codegen generate -i ./swagger.json -l typescript-angular -o ./src/swagger-client"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^7.2.15",
    "@angular/cdk": "^8.0.1",
    "@angular/common": "~7.2.0",
    "@angular/compiler": "~7.2.0",
    "@angular/core": "~7.2.0",
    "@angular/forms": "~7.2.0",
    "@angular/material": "^8.0.1",
    "@angular/platform-browser": "~7.2.0",
    "@angular/platform-browser-dynamic": "~7.2.0",
    "@angular/router": "~7.2.0",
    "@ngrx/core": "^1.2.0",
    "@ngrx/effects": "^7.4.0",
    "@ngrx/entity": "^7.4.0",
    "@ngrx/router-store": "^7.4.0",
    "@ngrx/schematics": "^7.4.0",
    "@ngrx/store": "^7.4.0",
    "@ngrx/store-devtools": "^7.4.0",
    "angular-in-memory-web-api": "^0.8.0",
    "classlist.js": "^1.1.20150312",
    "core-js": "^2.6.9",
    "date-fns": "^1.30.1",
    "formdata-polyfill": "^3.0.18",
    "hammerjs": "^2.0.8",
    "rxjs": "~6.3.3",
    "rxjs-compat": "^6.5.2",
    "tslib": "^1.9.0",
    "uuid": "^3.3.2",
    "web-animations-js": "^2.3.1",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.13.0",
    "@angular/cli": "~7.3.9",
    "@angular/compiler-cli": "~7.2.0",
    "@angular/language-service": "~7.2.0",
    "@types/date-fns": "^2.6.0",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "@types/uuid": "^3.4.4",
    "codelyzer": "~4.5.0",
    "cypress": "^3.3.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.2.2"
  }
}

所以我的目标是：

可以在项目中使用Angular Material v8
更新到Angular v8
继续使用生成的 Swagger 客户端

【问题讨论】：

示例问题！
我认为 swagger-codegen 可以在 Angular 8 中工作，尽管它确实需要一点帮助。见this。

标签： angular angular-material angular7 swagger-codegen angular8

【解决方案1】：

使用 ngrx 升级 Angular 的步骤

卸载 ngrx 包

运行命令 ng update @angular/cli @angular/core

由于ngrx包不可用，迁移angular核心包时会触发错误

解决问题重新安装ngrx包

运行命令 ng update @angular/core --from 7 --to 8 --migrate-only

完成角度升级

【讨论】：

【解决方案2】：

您需要放弃 npm 直接操作来升级 Angular 并采用自动完成所有必需工作的新 Angular Schematics。

改用 ng update 并从那里更新每个包，您可以使用 npm 更新其他库，但 Angular 及其库的新范例是通过 Schematics 。

拥抱他们的力量并开发您自己的代码生成器；）

【讨论】：