Request for an example for options for select field from a remote API through a service

[ampsarfraz]

I'm submitting a support request.

The request is for an example to fetch options for a select field from a remote API through a service.

Below is an option that I tried, however I couldn't get it to work.
I tried extending the FormlyFieldSelect but I am not able to inject a service into the constructor of the child class. The service always comes up as undefined.

import { NgModule, Component, OnInit} from '@angular/core';
import { EntityrecordApi } from '../sdk/services/custom';
import { Injectable, Inject } from '@angular/core';
import { FormlyFieldSelect } from 'ng2-formly';

@Component({
  selector: 'formly-field-lookup-select',
  providers: [EntityrecordApi],
  template:'<div>Test</div>'
})

export class LookupSelect extends FormlyFieldSelect implements OnInit{
  constructor(private _EntityrecordApi: EntityrecordApi) {
   super()
  }
  ngOnInit(): void {
   //Do Something here
    this._EntityrecordApi.find()
  }
}

[mohammedzamakhan]

Can you make a simple plnkr so that we can make that work?

[mohammedzamakhan]

Could this pull request be of any help to you? #286