【发布时间】:2018-01-13 08:48:55
【问题描述】:
我有一个 ionic 应用程序和一个 Angular Web 应用程序,它们都使用相同的 REST API。对于初始开发,我在两个项目中都复制了 api 实现代码,但现在我想将 api 服务提取到一个链接的 npm 包中,两个项目都可以使用并作为模块导入。包编译正常,但我的 Ionic 应用程序无法从包中的服务模块中找到提供程序。
我的服务包模块如下所示:
import { NgModule } from '@angular/core';
import { ApiService } from './api.service';
import { AuthenticationService } from "./authentication.service";
import { CognitoUtil, CognitoCallback, LoggedInCallback } from "./cognito.service";
import { DocumentsService } from "./documents.service";
import { TagService } from "./tag.service";
import { UsersService } from "./users.service";
import { AwsUtil } from "./aws.service";
@NgModule({
declarations: [
ApiService,
AuthenticationService,
CognitoUtil,
AwsUtil,
DocumentsService,
TagService,
UsersService
],
providers: [
AwsUtil,
CognitoUtil,
ApiService,
AuthenticationService,
ApiService,
DocumentsService,
TagService
]
})
export class MyAppServicesModule {
}
包的 index.ts 文件如下所示:
export { MyAppServicesModule } from './myapp-services.module';
我的 tsconfig.json 文件
{
"compilerOptions": {
"target": "es2016",
"module": "commonjs",
"declaration": true,
"outDir": "out",
"rootDir": "src",
"experimentalDecorators": true
},
"exclude": [
"node_modules",
"out"
]
}
package.json
{
"name": "@myapp/services",
"version": "1.0.0",
"description": "My App services",
"main": "index.js",
"scripts": {
"test": "test"
},
"author": "",
"license": "ISC",
"devDependencies": {
"@types/node": "^8.0.19",
"typescript": "^2.4.2"
},
"dependencies": {
"@angular/core": "^4.3.3",
"@angular/http": "^4.3.3",
"amazon-cognito-identity-js": "^1.19.0",
"rxjs": "^5.4.2"
}
}
编译包后我链接包
npm link
在我的应用程序代码中,我创建了一个指向我的包的链接
npm link @myapp/services
然后我将服务模块导入到我的主应用程序模块中
@NgModule({
declarations: [
MyApp
],
imports: [
BrowserModule,
IonicModule.forRoot(MyApp),
MyAppServicesModule,
LoginPageModule,
DocumentsPageModule,
],
bootstrap: [IonicApp],
entryComponents: [
MyApp
],
providers: [
StatusBar,
SplashScreen,
{provide: ErrorHandler, useClass: IonicErrorHandler}
]
})
export class AppModule {}
在我的登录页面中,我导入 AuthenticationService 并在构造函数中声明它,以便它由依赖注入器设置
import { AuthenticationService } from '@myapp/services'
@IonicPage()
@Component({
selector: 'page-login',
templateUrl: 'login.html',
})
export class LoginPage {
constructor (public navCtrl: NavController,
public navParams: NavParams,
public authenticationService: AuthenticationService) {}
但在尝试为我的应用提供服务时出现以下错误
typescript: src/pages/login/login.ts, line: 27
Cannot find name 'AuthenticationService'.
L26: public navParams: NavParams,
L27: public authenticationService: AuthenticationService) {}
对于从服务模块中对任何提供程序的所有引用,我也会收到相同的错误。我也尝试在服务模块的exports 部分列出服务,但这并没有解决问题。
我的离子版本
Ionic Framework: 3.2.1
Ionic App Scripts: 1.3.7
Angular Core: 4.1.0
Angular Compiler CLI: 4.1.0
Node: 7.7.1
OS Platform: macOS Sierra
Navigator Platform: MacIntel
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4
谢谢
【问题讨论】:
标签: node.js angular npm ionic3