TS: Namespace 'global.Express' has no exported member 'Session'

rstorms · December 23, 2020, 4:40am

I am a bit stuck here and I’m not sure if anyone will be able to help with how deep I am currently. I am 5hr, 43min. into this video by Ben Awad, where we are switching from MikroORM to TypeORM with a postgres DB.

The errors I am getting trying to run yarn watch is:

(He even gets the const conn one! But gets deleted by deleting the /dist directory??)

Here is the server code for his backend.

The file in question is src/types.ts and this is what I have currently:

import { Request, Response } from 'express';
import { Redis } from 'ioredis';

export type MyContext = {
  req: Request & { session: Express.Session };
  redis: Redis;
  res: Response;
};

Which is EXACTLY what he had at this part of the video. I have this in my IDE freaking out:

Any help is super appreciated! Happy holidays, everyone!

DanCouper · December 23, 2020, 8:23am

You’re not importing the Express type in that file

jenovs · December 23, 2020, 8:24am

Apparently there have been changes in types definition for express-session (SO link).
You should remove caret (^) from @types/express-session in server/package.json to have exact version installed:

"@types/express-session": "1.17.0",

rstorms · December 23, 2020, 4:52pm

Nevermind, I had fixed it! Thanks for the help!

jmutt78 · December 23, 2020, 6:53pm

Hi, how did you fix it?

vivikyd · December 25, 2020, 3:02am

Hey @rstorms, I just ran into the same issue following the same tutorial by Ben Award. If you don’t mind, could you please share the solution with me?

rstorms · December 27, 2020, 3:01am

Hey, @vivikyd, I’m still trying to barge through this solution funny enough. I’m unable to start my server from yarn dev after yarn watch. He has it set to read the index.js file directly inside the /dist directory, and I’m not sure how it is working for him.

LyzergicAid · December 28, 2020, 1:26pm

Hey. Could you share the solution to the session error? Thank You

rstorms · December 28, 2020, 5:54pm

This is my package.json right now, however, I am stuck about ten seconds after what I posted in this thread.

sessionDestroyer · December 30, 2020, 3:52pm

sooo…
this is my take on this:

import { EntityManager, IDatabaseDriver, Connection } from "@mikro-orm/core";
import { Request, Response } from "express";
import { Session } from "express-session";

export type MyContext = {
  em: EntityManager<any> & EntityManager<IDatabaseDriver<Connection>>;
  req: Request & { session?: Session & { userId?: number } };
  res: Response;
};

seems to eliminate that error

vovoz · December 30, 2020, 7:07pm

Hello hello,

The code you are talking about is useful for version 1.17.0, now that it is in version 1.17.3 there is a small modification that is made

You need to do this instead ->

import { Request, Response } from "express";
import { Session, SessionData } from "express-session";
import { Redis } from "ioredis";

export type MyContext = {
  req: Request & {
    session: Session & Partial<SessionData> & { UserID: number };
  };
  redis: Redis;
  res: Response;
};
// UserID -> as you wrote it  (userId, userid, etc...)

This will fix that issue

Happy coding