Angular 角4到5；类型'；可观察<；{}>'；不可分配给类型错误

我从Angular 4升级到了Angular 5，我得到了一个类型错误

Type 'Observable<{}>' is not assignable to type 'Observable<Device[]>'

下面是package.json：

"dependencies": {
    "@angular/animations": "^5.0.0",
    "@angular/common": "^5.0.0",
    "@angular/compiler": "^5.0.0",
    "@angular/core": "^5.0.0",
    "@angular/forms": "^5.0.0",
    "@angular/http": "^5.0.0",
    "@angular/platform-browser": "^5.0.0",
    "@angular/platform-browser-dynamic": "^5.0.0",
    "@angular/platform-server": "^5.0.0",
    "@angular/router": "^5.0.0",
    "@ng-bootstrap/ng-bootstrap": "^1.0.0-beta.3",
    "angular-ui-bootstrap": "^2.5.0",
    "bootstrap": "^3.3.7",
    "core-js": "^2.5.1",
    "express": "^4.15.4",
    "ng2-file-upload": "^1.2.1",
    "ngx-modialog": "^3.0.4",
    "ngx-pipes": "^1.6.5",
    "rxjs": "^5.5.2",
    "zone.js": "^0.8.14"
  },
  "devDependencies": {
    "@angular/cli": "1.3.2",
    "@angular/compiler-cli": "^5.0.0",
    "@angular/language-service": "^4.2.4",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "^2.0.3",
    "@types/node": "~6.0.60",
    "codelyzer": "~3.1.1",
    "jasmine-core": "~2.6.2",
    "jasmine-spec-reporter": "~4.1.0",
    "karma": "^1.7.1",
    "karma-chrome-launcher": "~2.1.1",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~3.2.0",
    "tslint": "~5.3.2",
    "typescript": "~2.4.2"
  }

---

typescript 2.4.2+比早期版本的限制性更强，您需要更好地进行键入

您需要将getMyDevices（）定义为：

---

ListDeviceService中有什么？向我们展示一下

ListDeviceService

bryan60的解决方案。但是我添加了列表设备服务。如果你有更好的建议，请告诉我。

import {Injectable} from '@angular/core';
import {AuthenticationService} from '../services/authentication.service';

@Injectable()
export class ListDeviceService {

  constructor(private authenticationService: AuthenticationService) {
  }

  getMyDevices() {
    const scope = this;
    return new Promise((resolve, reject) => {
      const token = this.authenticationService.getToken();
      const devicesPr = this.authenticationService.getPartsAPI().listDevices({auth: token});
      devicesPr.then(
        function (devices) {
          console.log('list', devices.body);
          resolve(devices.body);
        },
        function (err) {
          reject(err);
        }
      );
    });
  }
}

"dependencies": {
    "@angular/animations": "^5.0.0",
    "@angular/common": "^5.0.0",
    "@angular/compiler": "^5.0.0",
    "@angular/core": "^5.0.0",
    "@angular/forms": "^5.0.0",
    "@angular/http": "^5.0.0",
    "@angular/platform-browser": "^5.0.0",
    "@angular/platform-browser-dynamic": "^5.0.0",
    "@angular/platform-server": "^5.0.0",
    "@angular/router": "^5.0.0",
    "@ng-bootstrap/ng-bootstrap": "^1.0.0-beta.3",
    "angular-ui-bootstrap": "^2.5.0",
    "bootstrap": "^3.3.7",
    "core-js": "^2.5.1",
    "express": "^4.15.4",
    "ng2-file-upload": "^1.2.1",
    "ngx-modialog": "^3.0.4",
    "ngx-pipes": "^1.6.5",
    "rxjs": "^5.5.2",
    "zone.js": "^0.8.14"
  },
  "devDependencies": {
    "@angular/cli": "1.3.2",
    "@angular/compiler-cli": "^5.0.0",
    "@angular/language-service": "^4.2.4",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "^2.0.3",
    "@types/node": "~6.0.60",
    "codelyzer": "~3.1.1",
    "jasmine-core": "~2.6.2",
    "jasmine-spec-reporter": "~4.1.0",
    "karma": "^1.7.1",
    "karma-chrome-launcher": "~2.1.1",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~3.2.0",
    "tslint": "~5.3.2",
    "typescript": "~2.4.2"
  }

 getMyDevices(): Promise<Device[]> {... fetch the data ...}

this.listDeviceService.getMyDevices().then(function (data: Device[]) {
  scope.devices = Observable.of(data);
});