Type Query must define one or more fields

[AbdullahKhdir]

here I have these two GraphQL entities classes:

PageEntity.ts

import { Column, Entity, ManyToOne, PrimaryGeneratedColumn } from 'typeorm';

import PortfolioEntity from './PortfolioEntity';

@Entity()
export default class PageEntity {
  @PrimaryGeneratedColumn()
  id: number;

  @Column('varchar', { nullable: false })
  name: string;

  @Column('varchar', { nullable: false, unique: true })
  url: string;

  @ManyToOne(() => PortfolioEntity, { nullable: false })
  portfolio: PortfolioEntity;
}

and PortfolioEntity.ts

import { Field, ObjectType } from 'type-graphql';
import { Column, Entity, PrimaryGeneratedColumn, OneToMany } from 'typeorm';

import PageEntity from './PageEntity';

@ObjectType('Portfolio')
@Entity()
export default class PortfolioEntity {
  @Field()
  @PrimaryGeneratedColumn()
  id: number;

  @Field()
  @Column('varchar', { nullable: false })
  name: string;

  @Field()
  @Column('varchar', { nullable: false, unique: true })
  url: string;

  @OneToMany(() => PageEntity, (page) => page.portfolio)
  pages: PageEntity[];
}

and my resolver looks like the following:

import { Query, Resolver } from 'type-graphql';
import { Service } from 'typedi';
import { getRepository } from 'typeorm';

import PortfolioEntity from '../entities/PortfolioEntity';

@Resolver()
@Service()
export default class ListPortfoliosResolver {
  @Query(() => [PortfolioEntity],{ description: 'List all portfolios' })
  async listPortfolios(): Promise<PortfolioEntity[]> {
    const portfolioRepository = getRepository(PortfolioEntity);

    return portfolioRepository
      .createQueryBuilder('p')
      .getMany();
  }
}

when I run the app I keep getting this error.

[INFO] 11:41:53 ts-node-dev ver. 1.1.8 (using ts-node ver. 9.1.1, typescript ver. 4.4.4)
Error: Type Query must define one or more fields.
    at assertValidSchema (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\graphql\type\validate.js:69:11)
    at assertValidExecutionArguments (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\graphql\execution\execute.js:150:35)
    at executeImpl (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\graphql\execution\execute.js:98:3)
    at execute (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\graphql\execution\execute.js:60:35)
    at generateSchemaHash (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\apollo-server-core\src\utils\schemaHash.ts:26:25)     
    at ApolloServer.generateSchemaDerivedData (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\apollo-server-core\src\ApolloServer.ts:668:42)
    at Object.schemaDerivedDataProvider (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\apollo-server-core\src\ApolloServer.ts:285:18)
    at new SchemaManager (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\apollo-server-core\src\utils\schemaManager.ts:76:36)   
    at new ApolloServerBase (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\apollo-server-core\src\ApolloServer.ts:280:24)      
    at new ApolloServer (C:\Users\apuns\Downloads\digication-backend-worksample-typescript\ws_hw_fs_be_typescript-main\node_modules\apollo-server-koa\src\ApolloServer.ts:42:1)
[ERROR] 11:41:59 Error: Type Query must define one or more fields.

The thing is my query is defined with the fields in it and my resolver is defined!

where does the error message come from ?

[MichalLytek]

Show how you call buildSchema

[AbdullahKhdir]

It was a typo in the path.

import { GraphQLSchema } from 'graphql';
import { BuildSchemaOptions, buildSchemaSync } from 'type-graphql';
import { Container } from 'typedi';

export function createSchema(options?: Omit<BuildSchemaOptions, 'resolvers'>): GraphQLSchema {
  return buildSchemaSync({
    resolvers: [`${__dirname}/../resolvers/**/*.ts`], // Typo error in the path
    emitSchemaFile: true,
    container: Container,
    validate: true,
    ...options,
  });
}