Nestjs Grpc Graphql Error: this.. is not a function

Question

Hope you'll doing great

I'm trying to create a gateway for a Grpc service built with Nestjs and it's running correctly but I can't make the gateway connect to it, I read the documentation and follow the exact instruction there but still i got the same error and here is my code:

// speciality.service.ts

import { Inject, Injectable, OnModuleInit } from '@nestjs/common';
import { ClientGrpc } from '@nestjs/microservices';
import {
  Specialities,
  specialityServiceInterface,
} from './interface/services.interface';
import { Observable } from 'rxjs';

@Injectable()
export class SpecialityService  implements OnModuleInit{
  private spicilaityService: specialityServiceInterface;

  constructor(@Inject('SpecialityResolver') private client: ClientGrpc){}


  onModuleInit() {
    this.spicilaityService = this.client.getService<specialityServiceInterface>('SpecialityResolver');
  }

  async getAll(): Promise<Observable<Specialities>> {
    return await this.spicilaityService.getSpecialities();
  }
}

I'm not sure what is Observable exact job is also

Here is the interface for this service

import { Observable } from "rxjs";

export interface SpecialityInput {
    name: string;
    name_ar: string;
}

export interface SpecialityType {
    id: string;
    name: string;
    name_ar: string;
}

export interface Specialities {
    specialities: [SpecialityType]
}

export interface SubSpecialityInput {
    SpecialityId: string;
    name: string;
    name_ar: string;
}

export interface SubSpeciality {
    SpecialityId: string;
    name: string;
    name_ar: string;
}

export interface SubSpecialityType {
    id: string;
    SpecialityId: string;
    name: string;
    name_ar: string;
}

export interface SubSpecialities {
    subSpecialities: [SubSpeciality]
}


export interface specialityServiceInterface {
    getSpecialities(): Promise<Observable<Specialities>>
    
    getSubSpecialities(): Promise<Observable<SubSpecialities>>
    
    createSpeciality(data: SpecialityType): Promise<Observable<SpecialityType>>
    
    createSubSpeciality(data: SubSpecialityType): Promise<Observable<SubSpecialityType>>   
}

Hope this little information can help you understand the error

I should be able to get a response from a MongoDB exactly like the nest schema:

export interface SpecialityType {
    id: string;
    name: string;
    name_ar: string;
}

export interface Specialities {
    specialities: [SpecialityType]
}

Nestjs Grpc Graphql Error: this.. is not a function

0 Answers0