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Kenil Vasani
Kenil Vasani

Kenil Vasani

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Asked: 2020-12-19T22:00:33+00:00 In:

Typescript Error: Property ‘user’ does not exist on type ‘Request’

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I have the following piece of code in my express app

router.get('/auth/userInfo', this.validateUser,  (req, res) => {
    res.json(req.user);
});

and my IDE seems to be complaining with the error

error TS2339: Property ‘user’ does not exist on type ‘Request’.

When I compile my typescript code it seems to be throwing this error. Any ideas why this is happening?

node.jstypescript
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    1 Answer

    1. Kenil Vasani

      Kenil Vasani

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      Best Answer

      We have a large API written in Express and Typescript, and this is how we handle such scenarios:

      We keep the request definitions in one file:

      import { Request } from "express"
export interface IGetUserAuthInfoRequest extends Request {
  user: string // or any other type
}

      And then in the file where we are writing the controller functions:

      import { Response } from "express"
import { IGetUserAuthInfoRequest } from "./definitionfile"

app.get('/auth/userInfo', validateUser,  (req: IGetUserAuthInfoRequest, res: Response) => {
  res.status(200).json(req.user); // Start calling status function to be compliant with Express 5.0
});

      Be advised that “user” is not a property that is available natively in the Request object of Express. Make sure that you are using a middleware that adds such property to the request object.

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