How to make GraphQL enum data in resolver with nestjs/graphql?

Question

In this way, it can pass enum data in resolver:

    enum AuthType {
     GOOGLE =  'google-auth',
     GITHUB =  'github-auth',
     OUTLOOK = 'outlook-auth',
    }

    interface UsersArgs {
      first: number,
      from?: string,
      status?: String,
      authType?: AuthType,
    }

    export const resolvers = {
      AuthType,
      Query: {
        users: (_record: never, args: UsersArgs, _context: never) {
          // args.authType will always be 'google-auth' or  'github-auth' or 'outlook-auth'
          // ...
        }
      }
    }

There is also good example for pure GraphQL syntax as:

https://www.graphql-tools.com/docs/scalars#internal-values

In NestJS, the code like

    import { Args, Query, Resolver } from '@nestjs/graphql';

    import { AuthType } from '@enum/authEnum';

    @Resolver()
    export class AuthResolver {
      constructor(private readonly authRepo: AbstractAuthSettingRepository) {}
      
      @Query(() => AuthSetting)
      findAuth(
        @Args('input')
        id: string,
      ): Promise<AuthSetting | undefined> {
        return this.authRepo.findOne({ id });
      }
    }

How can I use AuthType in the AuthResolver class?

The question is absolutely unclear, the two code snippets do two totally different things. There's one thing missing in your NestJS code for sure, I'll add an an answer for that though. — skink
– skink, Commented Sep 12, 2022 at 8:22

skink · Accepted Answer · 2022-09-12 08:24:04Z

1

In order to be able to use enums in NestJS GraphQL, you need to register them once:

import { registerEnumType } from '@nestjs/graphql';
import { AuthType } from '@enum/authEnum';

registerEnumType(AuthType, { name: 'AuthType' });

answered Sep 12, 2022 at 8:24

skink

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