可观察错误，尝试使用get方法

Question

我正在尝试重构自定义 api get，如下所示： get( route: string, responseType: RespType = 'json', fullResponse: boolean = false, params = null): Observable<any> {    return this.invoke( 'GET', route, null, responseType, fullResponse, true, params);  }对此：@Injectable({  providedIn: 'root'})export class DocumentCorrespondenceService {  allCorrespondence: Observable<DossierEntry>;  correspondenceEntries: Observable <DossierEntry>;  attachmentEntries: Observable<DossierEntry>;constructor(private http: HttpClient) { }getDossierEntry( type: String = '' ): Observable<Array<DossierEntry>> {  const entryType = type === '' ? 'all' : 'type/' + type;  return this.http.get( '/api/patient/{patientUUID}/DossierEntry/' + entryType );}getDossierEntryFileData( entryID: number ): Observable<HttpResponse<Blob>> {  return this.get( '/api/patient/{patientUUID}/DossierEntry/' + entryID + '/fileData', 'pdf', true );}}但我现在收到这样的错误：Type 'Observable<Object>' is not assignable to type 'Observable<DossierEntry[]>'.  The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?    Type 'Object' is missing the following properties from type 'DossierEntry[]': length, pop, push, concat, and 26 more.ts(2322)那我必须改变什么？

Answer 1

在新的 Angular 版本中（导致升级 typescript 版本），您必须指定 http 调用预期的类型：

getDossierEntry( type: String = '' ): Observable<DossierEntry[]> {

  const entryType = type === '' ? 'all' : 'type/' + type;

  return this.http.get<DossierEntry[]>( '/api/patient/{patientUUID}/DossierEntry/' + entryType );

}

注意：我还用 改变了你的Array类型[]，这更像是“javascript”