NestJS Get current user in GraphQL resolver authenticated with JWT

Finally found the answer ... https://github.com/nestjs/graphql/issues/48#issuecomment-420693225 pointed me into the right direction of creating a user decorator

// user.decorator.tsimport { createParamDecorator } from '@nestjs/common';export const CurrentUser = createParamDecorator(  (data, req) => req.user,);

And then use this in my resolver method:

 import { User as CurrentUser } from './user.decorator'; @Query(returns => User)  @UseGuards(GqlAuthGuard)  whoami(@CurrentUser() user: User) {    console.log(user);    return this.userService.findByUsername(user.username);  }

Now everything works as expected. So all credits of this answer goes to https://github.com/cschroeter

Another approach is to validate web token with whatever package you are using, then create decorator get-user.decorator.ts

import { createParamDecorator, ExecutionContext } from '@nestjs/common';import { GqlExecutionContext } from '@nestjs/graphql';export const GetUser = createParamDecorator((data, context: ExecutionContext)  => { const ctx = GqlExecutionContext.create(context).getContext();return ctx.user});

then in your resolver, you can use this decorator (@GetUser() user: User)to access the user

Wish I could take any sort of credit here, I'm simply passing along information from the course, NestJS Zero To Hero (absolutely fantastic btw).

For NestJS 7:

// get-user.decorator.tsimport { createParamDecorator, ExecutionContext } from '@nestjs/common';import { User } from '../../user/entity/user.entity';export const GetAuthenticatedUser = createParamDecorator((data, ctx: ExecutionContext): User => {  const req = ctx.switchToHttp().getRequest();  return req.user;});

You can implement this however you like. I have an auth.controller that looks something like this:

// auth.controller.tsimport { GetAuthenticatedUser } from './decarator/get-user.decorator';...@Controller('api/v1/auth')export class AuthController {  constructor(private authService: AuthService) {    //  }  ...  /**   * Get the currently authenticated user.   *   * @param user   */   @Post('/user')   @UseGuards(AuthGuard())   async getAuthenticatedUser(@GetAuthenticatedUser() user: User) {     console.log('user', user);   }

Result is something like this:

// console.log output:user User {  id: 1,  email: 'email@test.com',  ...}