[英]@Inject custom provider in Angular 2.0.1
i have issue with my custom provider in Angular 2.0.1.我在 Angular 2.0.1 中的自定义提供程序有问题。 I create a custom provider for my http request to add in header a parameter on every request, but when i use them on my provider for user services i get error.
我为我的 http 请求创建了一个自定义提供程序,以便在每个请求的标头中添加一个参数,但是当我在我的用户服务提供程序上使用它们时,我收到错误。
HttpClient (custom) HttpClient (自定义)
@Injectable()
export class HttpClient {
constructor(@Inject(Http) private _http: Http){}
}
UserServices用户服务
@Injectable()
export class UsersServices {
constructor(@Inject(HttpClient) private _http: HttpClient) {}
}
Error in console:控制台中的错误:
Can't resolve all parameters for UsersServices: (?).
无法解析 UsersServices 的所有参数:(?)。
tsconfig.json (typescript:2.0.3) tsconfig.json (打字稿:2.0.3)
{
"compileOnSave": false,
"compilerOptions": {
"declaration": false,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"target": "es5",
"mapRoot": "./",
"module": "commonjs",
"moduleResolution": "node",
"noEmitOnError": true,
"noImplicitAny": false,
"outDir": "../dist",
"sourceMap": true,
"typeRoots": [
"../node_modules/@types"
],
"types": [
"core-js",
"jasmine",
"node"
]
},
"files": [
"main.ts",
"typings.d.ts"
]
}
app.module.ts (angular:2.0.1) app.module.ts (角度:2.0.1)
@NgModule({
imports: [
CommonModule,
RouterModule,
HttpModule
],
exports: [],
declarations: [...],
providers: [ HttpClient, UsersServices ],
})
export class AppModule { }
After of some hours debugging in the core of angular, i found a solution, i don't know if it is correct (best) but it's look works.在 angular 核心调试几个小时后,我找到了一个解决方案,我不知道它是否正确(最好),但它看起来很有效。
app.module.ts (angular:2.0.1) app.module.ts (角度:2.0.1)
@NgModule({
imports: [
CommonModule,
RouterModule,
HttpModule
],
exports: [],
declarations: [...],
providers: [
{ provide:"appHttpClient", useClass:HttpClient }
, { provide:"appUsersServices", useClass:UsersServices }
]
})
export class AppModule { }
HttpClient (custom) HttpClient (自定义)
@Injectable()
export class HttpClient {
constructor(@Inject(Http) private _http: Http){}
}
UserServices用户服务
@Injectable()
export class UsersServices {
constructor(@Inject("appHttpClient") private _http: HttpClient) {}
}
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