我试图让@autoinject装饰器在VS2015 ASP.NET MVC 6项目中工作.
这是我的代码
import {autoinject} from "aurelia-framework";
import {HttpClient} from "aurelia-http-client";
@autoinject()
export class App {
http: HttpClient;
constructor(httpClient: HttpClient) {
this.http = httpClient;
}
activate() {
this.http.get("/api/test/")...
}
}
当我运行这个时,我得到一个错误,说this.http是未定义的.
我相信我需要添加TypeScript的emitDecoratorMetadata标志,但我不知道如何.
我已经尝试将tsconfig.json文件添加到我的项目并在编译器选项中设置该标志,但后来我得到一堆错误(重复标识符).
我该如何解决这些错误.我需要在“文件”中添加一些内容吗？到底是什么？
这是我的config.js文件
System.config({
baseURL: "/",defaultJSExtensions: true,transpiler: "typescript",paths: {
"npm:*": "jspm_packages/npm/*","github:*": "jspm_packages/github/*"
},map: {
"aurelia-bootstrapper": "npm:aurelia-bootstrapper@1.0.0-beta.1","aurelia-framework": "npm:aurelia-framework@1.0.0-beta.1.0.7","aurelia-http-client": "npm:aurelia-http-client@1.0.0-beta.1","typescript": "npm:typescript@1.7.5",....
}
});
解决方法
Before you need to aware of TypeScript’s
emitDecoratorMetadataflag causes the TypeScript compiler to polyfill the Metadata Reflection API and add a special decorator deFinition to the transpiled TypeScript code.Aurelia’s @autoInject() decorator consumes the type Metadata created by TypeScript’s decorator and applies it to the class in the same way that the @inject(…) decorator does.
尝试如下所示,您需要在类型脚本的compilerOptions中启用新选项.
TS配置：
{
"version": "1.5.1","compilerOptions": {
"target": "es5","module": "amd","declaration": false,"noImplicitAny": false,"removeComments": false,"noLib": true,"emitDecoratorMetadata": true
},"filesGlob": [
"./**/*.ts","!./node_modules/**/*.ts"
],"files": [
// ...
]
}
文章的片段截图：
关于emitDecoratorMetadata的文章：
http://blog.durandal.io/2015/05/06/getting-started-with-aurelia-and-typescript/
http://www.danyow.net/inversion-of-control-with-aurelia-part-2/
可用类型脚本选项：
https://github.com/Microsoft/TypeScript/wiki/Compiler-Options
You can do it with Gulp-Typescript as well with Gulp option
选项：https://github.com/ivogabe/gulp-typescript#options
GitHub问题主题：https://github.com/ivogabe/gulp-typescript/issues/100
Gulp Code代码段：
gulp.task(‘build-ts’,[],function(){
return gulp.src(paths.typescript)
.pipe(plumber())
.pipe(changed(paths.output,{extension: '.js'}))
.pipe(sourcemaps.init())
.pipe(ts({
declarationFiles: false,noExternalResolve: true,target: 'es5',module: 'commonjs',emitDecoratorMetadata: true,typescript: typescript
}))
.pipe(sourcemaps.write())
.pipe(gulp.dest(paths.output));
});