observable undefined in component

I have a service that connects with api

export class ConsolidadoApi {
  constructor(private http: HttpClient) { }
  getInvestiments(search?: any): Observable<any> {
    return this.http.get<any>(`${environment.basePosicaoConsolidada}`);
  }
}

Response this api:

CodePudding user response：

The raw response is an object. forEach works only on an array. If you are aiming for forEach in 'categorias', you should try

this.test.categorias.forEach()

CodePudding user response：

When you return Observable<any>, that means the argument of the lambda you create when you do subscribe (which you named response) is type any. This doesn't necessary have the function forEach defined (unless the API returns an object with that prototype). That's generally why using any is not good practice; you can't have any expectations on what the object can contain. In fact, it's possible that it's not on object (it could be an array since any is not exclusively an object). If you do want to use forEach, you will want to make sure that response is type array. You can inspect the object's type before using it (e.g. using typeof) and make a judgement on what to call or even just check if the function you're trying to use is defined first, e.g. if (response.forEach !== undefined). You don't actually need to compare to undefined though, so if (response.forEach) suffices. In the examples, I used response, but you can use this.test since they are the same object after the first line in the lambda.

CodePudding user response：

Based on the link you shared, the response is an object. You can log it to the console to confirm.

You can only call for each on an array, so for example, based on the response api, you can call forEach on the property ‘categorias’ and on that array’s children property ‘produtus’

    public createMenu() {
        return this.api.getInvestiments()
       }

    ngOnit() {
        this.coreService.createMenu().subscribe(x => console.log(x.categorias))};




{
 "codigo":1,
 "categorias":[
    {
       "nome":"Referenciado",
       "valorTotal":23000.0,
       "codigo":"2",
       "produtos":[
          {
           "nome":"CDB FÃƒÂ¡cil Bradesco",
           "valor":2000.0,
           "codigo":1,
           "quantidade":0.0,
           "porcentagem":0.5500,
           "aplicacaoAdicional":500.0,
           "codigoInvest":1,
           "salaInvestimento":"CDB",
           "permiteAplicar":true,
           "permiteResgatar":true,
           "movimentacaoAutomatica":false,
           "ordemApresentacao":37,
           "horarioAbertura":"08:30",
           "horarioFechamento":"23:59",
           "codigoGrupo":0,
           "codigoMF":"001