I created custom nest js guard which is running before every request and I have added a property called all() on the request in that guard - nestjs

Question

I have created a interface which is extending the request (of express)
I m adding property called all() in it
which contains the body , query and params in it
import { Request as BaseRequest } from 'express';
export interface Request extends BaseRequest {
all(): Record<string, any>;
}
this is the interface
which is extending the express request
and i m adding this all() property using the guard
this is the implementation of it
#Injectable()
export class RequestGuard implements CanActivate {
canActivate(
context: ExecutionContext,
): boolean | Promise<boolean> | Observable<boolean> {
this.requestHelper(context.switchToHttp().getRequest());
return true;
}
requestHelper(request: any): any {
const all = function (): Record<string, any> {
return {
...request.query,
...request.body,
...request.params,
};
};
request.all = all;
return request;
}
}
in the main.ts file i have used this guard
import { NestFactory } from '#nestjs/core';
import { AppModule } from './app.module';
import { ValidationPipe } from '#nestjs/common';
import { RequestGuard } from './core/guards/request.guard';
async function bootstrap() {
const app = await NestFactory.create(AppModule);
app.useGlobalPipes(
new ValidationPipe({
whitelist: true,
}),
);
app.useGlobalGuards(new RequestGuard());
await app.listen(3000);
}
bootstrap();
and i have tried consoling the all() property in the guard and it's working
its mean request is flowing in it
when i try to get this all() property in my controller then it showing
Cannot read properties of undefined (reading 'all')
That's how i m calling it
import {
Controller,
Get,
Post,
Param,
Body,
Req,
Res,
UseGuards,
} from '#nestjs/common';
import { RequestGuard } from 'src/core/guards/request.guard';
import { Request } from 'src/core/http/Request';
import { Response } from 'src/core/http/Response';
#UseGuards(RequestGuard)
#Controller('customers')
export class CustomersController {
constructor(private customersService: CustomersService) {}
#Get('/order-data/:id')
async OrderData(#Param('id') id: string, req: Request, #Res() res: Response) {
console.log(req.all());
const data = await this.customersService.allOrdersData(parseInt(id));
return data;
}
}
I m calling the route localhost:3000/customers/order-data/1
console.log(req.all());
It should print {id:{'1'}}
But it's giving error
Cannot read properties of undefined (reading 'all')

Answer 1

You're missing the #Req() for your req property in the OrderData method.