Argument type URL is not assignable to parameter type string

Question

I am trying to perform an Axios request using the URL type. But I get the error Argument type URL is not assignable to parameter type string

import { Injectable } from '@nestjs/common'
import { NotificationsInterface } from '../interface/notifications.interface'
import { OS, UserType } from '../../global.constants'
const axios = require('axios').default

@Injectable()
export class NotificationsGateway implements NotificationsInterface {
  readonly urlDevices = new URL(
    'https://blablablabla.amazonaws.com/Prod/devices'
  )

  async saveDeviceAuthenticationInfos(
    userId: number,
    userType: UserType,
    deviceId: number,
    pushToken: string,
    operatingSystem: OS
  ): Promise<void> {
    const body = {
      userId,
      userType,
      deviceId,
      pushToken,
      operatingSystem,
    }

    await axios.post(this.urlDevices, body)
  }
}

How am I suppose to make it work? I am half a mind to put it back into a string, but I feel like it's a regression.

Axios expects a string, as the error tells you - you could pass this.urlDevices.toString(), or have a facade for Axios that accepts a URL (which would have other benefits), but what was the objective in making it a URL to start with? — jonrsharpe
– jonrsharpe, Commented Oct 20, 2020 at 12:40
Well, I am manipulating a URL, therefore it made sense to use this type to be more rigourous. Ain't it the reason to use typescript instead of vanilla JS in the first place ? — A Mehmeto
– A Mehmeto, Commented Oct 20, 2020 at 12:43
You can use .toString() to stringify the url: await axios.post(this.urlDevices.toString(), body) — Aleksey L.
– Aleksey L., Commented Oct 20, 2020 at 13:24

HartWoom · Accepted Answer · 2020-10-20 14:37:55Z

4

Like the error says, you're giving a URL where a string is expected.

If you want to keep using the type URL for some reasons, you can do the following: give this.urlDevices.toString() as the first parameter of the axios.post() method.

Or you can just type your urlDevices as a string if you're not planning on using URL's static methods.

answered Oct 20, 2020 at 14:37

HartWoom

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