类型 'myClass[]' 与签名"()： myClass[]"不匹配。[2322]

Question

我正在尝试从API获取项目列表，但出现以下错误：

Type 'TestFields[]' provides no match for the signature '(): TestFields[]'. [2322]

下面是我的代码

export class ProjectOperation extends TestFields {
  projectList: TestFields[];
  constructor(
    private _http: HttpClient,
    private _services: DeoService
  ) {
    super();
    // this.projectList = new TestFields()
  }
  getProjects(): TestFields[] {
    // below is the line where i am getting error 
    this._services.getProjects('/api/project/getProject').subscribe(res => {
      this.getProjects = res;
    }); // this is the area i am getting error
    return this.projectList;
  }
}

这是我的获取项目代码

public getProjects(api: string): Observable<TestFields[]> {
    return this._http.get<TestFields[]>(api);
  }

Answer 1

可以从服务返回方法，而不是将方法的结果分配给变量，然后返回它：

export class ProjectOperation extends TestFields {
  constructor(
    private _http: HttpClient,
    private _services: DeoService
  ) {
    super();
  }
  getProjects(): TestFields[] {
    return this._services.getProjects('/api/project/getProject');
  }

}