non-generic-search.ts

import { OnInit } from '@angular/core';
import { FormArray, FormBuilder, FormControl, FormGroup, Validators } from '@angular/forms';

export interface CommonAddress {
  id: number;
  name: string;
}

export const FORM_PARAMS = {
  supervisors: 'supervisors',
};

export class RecruitmentEditComponent implements OnInit {
  public recruitmentForm: FormGroup;

  constructor(private fb: FormBuilder) {}

  ngOnInit() {
    this.recruitmentForm = this.fb.group({
      supervisors: this.fb.array([]),
    });
  }

  get supervisors(): FormArray {
    return this.recruitmentForm.get(FORM_PARAMS.supervisors) as FormArray;
  }

  // You will not get any error if `_.id type is not equal to item.id`
  selectSupervisor(item: any) {
    const defined = this.supervisors.getRawValue().some(_ => _.id === item.id);
    if (!defined) {
      this.supervisors.push(new FormControl({
        id: item.id,
        name: item.name,
      }));
    }
  }
}