最近将我的应用程序从Angular 2.3.0升级到Angular 4.0.3。在此过程中还升级了angular-cli。如果项目克隆到新目录,则抛出:
无法读取null的属性'config'TypeError:无法读取属性 'config'为null 在Class.run(/Users/hyadav/Documents/projects/web-app/node_modules/@angular/cli/tasks/build.js:16:56) 在Class.run(/Users/hyadav/Documents/projects/web-app/node_modules/@angular/cli/commands/build.js:143:26) 在课堂上。 (/Users/hyadav/Documents/projects/web-app/node_modules/@angular/cli/ember-cli/lib/models/command.js:134:17) at process._tickCallback(internal / process / next_tick.js:109:7)
的package.json
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "^4.0.3",
"@angular/cli": "^1.0.1",
"@angular/common": "^4.0.3",
"@angular/compiler": "^4.0.3",
"@angular/compiler-cli": "^4.0.3",
"@angular/core": "^4.0.3",
"@angular/forms": "^4.0.3",
"@angular/http": "^4.0.3",
"@angular/material": "^2.0.0-beta.3",
"@angular/platform-browser": "^4.0.3",
"@angular/platform-browser-dynamic": "^4.0.3",
"@angular/platform-server": "^4.0.3",
"@angular/router": "^4.0.3",
"core-js": "^2.4.1",
"hammerjs": "^2.0.8",
"rxjs": "^5.2.0",
"typescript": "^2.2.2",
"zone.js": "^0.8.4"
},
"devDependencies": {
"@angular/cli": "^1.0.1",
"@angular/compiler-cli": "^2.4.0",
"@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-coverage-istanbul-reporter": "^0.2.0",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.0",
"ts-node": "~2.0.0",
"tslint": "~4.4.2",
"typescript": "~2.2.2"
}
答案 0 :(得分:16)
这是一个有效的解决方案,直到Angular v5,因为在v6中,文件的位置更改为angular.json,并且还更改了内容
创建一个名为 .angular-cli.json 的新文件并插入:
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"project": {
"name": "PROJECT_NAME"
},
"apps": [
{
"root": "src",
"outDir": "dist",
"assets": [
"assets",
"favicon.ico"
],
"index": "index.html",
"main": "main.ts",
"polyfills": "polyfills.ts",
"test": "test.ts",
"tsconfig": "tsconfig.app.json",
"testTsconfig": "tsconfig.spec.json",
"prefix": "app",
"styles": [
"styles.css"
],
"scripts": [],
"environmentSource": "environments/environment.ts",
"environments": {
"dev": "environments/environment.ts",
"prod": "environments/environment.prod.ts"
}
}
],
"e2e": {
"protractor": {
"config": "./protractor.conf.js"
}
},
"lint": [
{
"project": "src/tsconfig.app.json"
},
{
"project": "src/tsconfig.spec.json"
},
{
"project": "e2e/tsconfig.e2e.json"
}
],
"test": {
"karma": {
"config": "./karma.conf.js"
}
},
"defaults": {
"styleExt": "css",
"component": {}
}
}
如果您从angular-cli创建新项目,也会找到此json的副本。
答案 1 :(得分:9)
通过将.angular-cli.json
文件复制到新目录来修复此问题。
每个请求,更多详情:
创建项目后,但在将其移动到其他目录之前,您会注意到已创建.angular-cli.json
文件,可通过命令行ls -al
显示。项目的根目录中需要此文件。它应该通过mv .angular-cli.json .
移动到那里,并且应该添加到源代码控制中,以便其他克隆项目的人都有这个文件。
答案 2 :(得分:4)
我找到了解决方案! :D
在我的情况下,我将项目移动到另一个目录 有一个名为.angular-cli,
的隐藏文件显示旧项目中的隐藏文件并复制此文件并粘贴它 在新目的地。
这解决了我的问题。
答案 3 :(得分:0)
别忘了安装npm软件包,
在根目录中运行npm i
答案 4 :(得分:0)
在angular 5之后,当我们创建项目的zip或副本时,那时 angular-cli.json文件未包含在zip或副本文件夹中,我们将此zip或文件夹发送给另一个朋友或本身,但安装角度项目后。我们运行ng serve,但是很遗憾,它给出错误无法读取null的属性配置
因此要解决此问题,还发送 angular-cli.json 文件,或者您可以将其复制并粘贴到新项目(错误项目)中。
* angular-cli.json = 其隐藏文件 .....必须记住。