ctorParameters.map不是angular2-mdl中的函数

Question

我正在尝试使用angular2-mdl和angular-cli.我MdlModule在app.module.ts中导入.

当我尝试使用时<mdl-textfield type="text" label="Text..." floating-label></mdl-textfield>,它会出错:

ctorParameters.map不是angular2-mdl中的函数

我不知道该怎么做.

这是我的angular-cli.json.

  "dependencies": {
    "@angular/common": "~2.0.0",
    "@angular/compiler": "~2.0.0",
    "@angular/core": "~2.0.0",
    "@angular/forms": "~2.0.0",
    "@angular/http": "~2.0.0",
    "@angular/material": "^2.0.0-alpha.9-3",
    "@angular/platform-browser": "~2.0.0",
    "@angular/platform-browser-dynamic": "~2.0.0",
    "@angular/router": "~3.0.0",
    "@types/moment-timezone": "^0.2.33",
    "angular-cli": "^1.0.0-beta.17",
    "angular2-jwt": "^0.1.25",
    "angular2-mdl": "^2.9.0",
    "bootstrap": "^3.3.7",
    "bourbon": "^4.2.7",
    "core-js": "^2.4.1",
    "font-awesome": "^4.7.0",
    "hammerjs": "^2.0.8",
    "moment": "^2.17.1",
    "moment-timezone": "^0.5.10",
    "node-sass": "^3.13.0",
    "primeng": "^1.1.0",
    "rxjs": "5.0.0-beta.12",
    "ts-helpers": "^1.1.1",
    "zone.js": "^0.6.23"
  },
  "devDependencies": {
    "@types/jasmine": "^2.2.30",
    "@types/moment": "^2.13.0",
    "@types/moment-timezone": "^0.2.33",
    "@types/node": "^6.0.42",
    "angular-cli": "1.0.0-beta.17",
    "bootstrap-sass": "^3.3.7",
    "codelyzer": "~0.0.26",
    "jasmine-core": "2.4.1",
    "jasmine-spec-reporter": "2.5.0",
    "karma": "1.2.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-cli": "^1.0.1",
    "karma-jasmine": "^1.0.2",
    "karma-remap-istanbul": "^0.2.1",
    "protractor": "4.0.9",
    "ts-node": "1.2.1",
    "tslint": "3.13.0",
    "typescript": "2.0.2"
  }

Answer 1

看起来这个问题需要一些澄清:

为什么我们会看到此错误消息？

如果angular2的组件库想要与AOT兼容,则需要使用ngc(@ angular/compiler-cli)进行编译.这将为每个组件生成*.metadata.json文件.此外,这会为每个组件生成包含有关构造函数参数的信息的js文件.如果软件包是使用@ angular/compiler-cli <2.3.0的版本编译的,那么(例如):

MdlBadgeDirective.ctorParameters = [
        { type: ElementRef, },
        { type: Renderer, },
];

如果使用较新版本编译包,则将:

MdlBadgeDirective.ctorParameters = function () { return [
        { type: ElementRef, },
        { type: Renderer, },
]; };

正如您所看到的,新版本是一个函数而不再是一个数组.所以错误

ctorParameters.map不是一个函数

说得通.因为map是数组的成员但不是函数的成员.

如何解决这个问题呢？:

1. 您可以将角度版本(或尝试编译angular2代码的包)更新为新的编译器输出格式.例如至少@angular/*@ 2.3.1.(如果您使用的是angular-cli,则应将项目升级到angular-cli@1.0.0-beta.24)

2. 您可以将正在使用的软件包锁定到与旧编译器输出格式匹配的版本.对于angular2-mdl,这是版本2.7.0.您可以在此处找到此信息:https://github.com/mseemann/angular2-mdl#remarks.

是否可以使用一个使用较旧的angular-compiler-cli编译的包和一个较新的angular-compiler-cli版本？(例如,你处于角度2.4.1并且想要使用angular2-mdl@2.7.0)是的!该方向向后兼容.请参阅https://github.com/angular/angular/blob/master/modules/%40angular/core/src/reflection/reflection_capabilities.ts#L80

Answer 2

我有同样的问题(使用另一个插件)并通过将角度升级到最新版本(2.4.1)来解决它.

编辑:完整的packages.json

检查您的Typescript版本.由于编译时出现连续问题,我不得不停止使用Angular-cli.我切换到webpack.

{
  "name": "web-app",
  "version": "1.0.0",
  "scripts": {
    ....
  },
  "license": "UNLICENSED",
  "dependencies": {
    "@angular/common": "~2.4.1",
    "@angular/compiler": "~2.4.1",
    "@angular/compiler-cli": "^2.4.1",
    "@angular/core": "~2.4.1",
    "@angular/forms": "~2.4.1",
    "@angular/http": "~2.4.1",
    "@angular/platform-browser": "~2.4.1",
    "@angular/platform-browser-dynamic": "~2.4.1",
    "@angular/platform-server": "^2.4.1",
    "@angular/router": "~3.4.1",
    "codelyzer": "^1.0.0-beta.3",
    "concurrently": "^3.1.0",
    "core-js": "^2.4.1",
    "reflect-metadata": "^0.1.8",
    "rxjs": "5.0.1",
    "tslint": "^4.2.0",
    "typescript": "^2.1.4",
    "typings": "^2.1.0",
    "zone.js": "^0.7.4",
    ...
  },
  "devDependencies": {
    "@angular/compiler-cli": "^2.4.1",
    "@ngtools/webpack": "^1.2.1",
    "extract-text-webpack-plugin": "^1.0.1",
    "ts-loader": "^1.3.3"
  }
}