USE IONIC STORAGE DATA ON ANOTHER FUNCTION

Issue

Am using ionic to develop a new APP.

i have have a service lool like this

import { Injectable } from "@angular/core";
import { HttpClient, HttpHeaders } from "@angular/common/http";
import { Observable, of } from "rxjs";
import { catchError, tap } from "rxjs/operators";
import { environment } from "src/environments/environment";
import { Storage } from "@ionic/storage";
//No problem on import

@Injectable({
  providedIn: "root"
})
export class myservice {

  serverUrl = environment.baseUrl;

  httpHeader = {
    headers: new HttpHeaders({ "Content-Type": "application/json" })
  };

  userid: number;

  constructor(private http: HttpClient, private storage: Storage) {
  }

  async getFromStorageAsync(){
      await this.storage.get('userid').then((val)=>{
        this.userid = val;
        console.log("UserId", this.userid); //Here it work fine
      });
      console.log("UserId", this.userid); // Here it work fine too
  }

  use_storage_data() {
    this.getFromStorageAsync();
    console.log("Userid",this.userid); // Here is undefined
    let postData = {
      userid: this.userid, // here is undefined
      username: "samplename"
    };
    return this.http
      .post<any>(this.serverUrl + "/appdata.php", postData)
      .pipe(catchError(this.handleError));
  }

}

Then on page i call it like this

  getData(){
    this.myservice.use_storage_data().subscribe(data => {
     // console.log(data);
    });
  }

Please help me to make storage data as global variable Or you may suggest a new approach to save and use data like user id and user name on ionic app

NOTE i have successful set userid when user login

Regards.

Solution

I change the way i get value from storage

On page i import this

import { Storage } from "@ionic/storage";

Get value from storage and pass to service

  getData(){
    this.storage.get('userid').then((val)=>{
      this.myservice.use_storage_data(val).subscribe(data => {
        console.log(data);
      });
    });
  }

This work perfectly

Answered By - EwS