How to convert API Object to Array - arrays

Question

I stuck with this error ERROR Error: Cannot find a differ supporting object '[object Object]' of type 'object'. NgFor only supports binding to Iterables such as Arrays.
I am trying to fetch data from API but it's showing me this error, as I am still learning angular please guide me on how to tackle this kind of errors.
metadata-service.service.ts
import { HttpClient } from '#angular/common/http';
import { Injectable } from '#angular/core';
import { Observable } from 'rxjs';
import { Pincodes } from 'src/app/Model/Pincodes';
import { baseURL } from 'src/environments/environment';
#Injectable({
providedIn: 'root'
})
export class MetadataServiceService {
constructor(private http:HttpClient) { }
public GetPincodes() : Observable<any> {
console.log("Calling GetPincodes API")
return this.http.get("/Metadata/api/metadata/getpincodes") // My API Link
}
}
API consist of the following data
{
"program": null,
"version": null,
"dateTime": null,
"success": true,
"errorCode": null,
"errorMessage": null,
"message": "Pincodes read Successfully",
"data": [
{
"pincode": 400708,
"village": "Airoli",
"taluka": "Thane",
"district": "Thane",
"state": "Maharashtra"
},
{
"pincode": 416007,
"village": "Kaamba",
"taluka": "Kalyan",
"district": "Thane",
"state": "Maharashtra"
},
{
"pincode": 421102,
"village": "Atali",
"taluka": "Kalyan",
"district": "Thane",
"state": "Maharashtra"
},
{
"pincode": 421501,
"village": "Ambarnath",
"taluka": "Ambarnath",
"district": "Thane",
"state": "Maharashtra"
},
{
"pincode": 421503,
"village": "Ambeshiv",
"taluka": "Ambarnath",
"district": "Thane",
"state": "Maharashtra"
}
]
}
I am interested in the data array
Pincode.ts
export class Pincodes {
pincode : number
village : string
taluka : string
district : string
state : string
}
register-page.component.ts
import { Component, OnInit } from '#angular/core';
import { data } from 'jquery';
import { Pincodes } from 'src/app/Model/Pincodes';
import { MetadataServiceService } from 'src/app/shared/services/metadata-service.service';
import { Albums } from "src/app/Model/albums";
import { Observable, of } from 'rxjs';
import {MatTableDataSource, MatTableModule} from '#angular/material/table';
import { report } from 'process';
#Component({
selector: 'app-register-page',
templateUrl: './register-page.component.html',
styleUrls: ['./register-page.component.css']
})
export class RegisterPageComponent implements OnInit {
observeData : Pincodes[]
modifiedText: any;
PinSelected : any = {}
constructor(private _metadataService: MetadataServiceService) { }
ngOnInit(){
this._metadataService.GetPincodes()
.subscribe(data => {
this.observeData = data;
});
}
onPincodeSelected(val : Pincodes){
console.log("value" + val);
this.customFunction(val)
}
customFunction(val : Pincodes){
this.modifiedText = "The Selected Pin was " + val.pincode + " and selected District is " + val.village
console.log("modifiedText" + this.modifiedText);
console.log("Pincode Selected" + this.PinSelected);
console.log("observeData Selected" + this.observeData);
}
}
register-page.component.html
<select
[(ngModel)]="PinSelected"
(ngModelChange)="onPincodeSelected($event)"
>
<option *ngFor="let pin of observeData" [ngValue]="pin">
{{ pin.pincode }}
</option>
</select>
<div>
<p>{{ modifiedText }}</p>
</div>
Error: Cannot find a differ supporting object '[object Object]' of type 'object'.

Answer 1

Try this:
ngOnInit(){
this._metadataService.GetPincodes()
.subscribe(res=> {
this.observeData = res.data;
});
}