Angular+Firebase

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute, Params } from '@angular/router';
 
import { Goods } from '../model/goods.model';
import { HttpService } from '../services/goods.service';
 
@Component({
  selector: 'app-good',
  templateUrl: './good.component.html',
  styleUrls: ['./good.component.scss'],
  providers: [HttpService]
})
export class GoodComponent implements OnInit {
 
  good: Goods
  header: string = 'Подробнее о товаре'
  statisticalInformation: string
  goodId: any
  itemID
 
  constructor(private activatedRoute: ActivatedRoute, private httpService: HttpService) { 
    this.goodId = activatedRoute.snapshot.params["id"]
    this.statisticalInformation = activatedRoute.snapshot.data[0]['statInf'];
  }
 
  ngOnInit(): void {
    this.activatedRoute.params.subscribe((params: Params) => {
      console.log(params)
      this.itemID = this.httpService.getGoodsById(params.id)
      console.log(this.itemID)
    })
  }
}

import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { AngularFireDatabase, AngularFireList, AngularFireObject } from '@angular/fire/database';
 
import { HttpClient } from '@angular/common/http';
import { Goods } from '../model/goods.model';
  
@Injectable()
export class HttpService {
    
    goodsList: AngularFireList<Goods[]> = null
    item: AngularFireObject<Goods> = null
    private basePath: string = '/goods'
    
    constructor(private http: HttpClient, private firebaseDB: AngularFireDatabase){ }
    
    getGoogsList(): AngularFireList<Goods[]> {//all goods 
        this.goodsList = this.firebaseDB.list(`${this.basePath}`);
        return this.goodsList;
    }
 
    getGoodsById(key: number): AngularFireObject<Goods> {//one goods
        const itemPath = `${this.basePath}/${key}`;
        this.item = this.firebaseDB.object(itemPath);
        return this.item  
    }
 
    getAllGoods(params: {}): Observable<any> {
        return this.http.get((`${this.basePath}`), {params});
    }
}

this.httpService.getGoodsById(params.id).subscribe(item => console.log(item));