CODEWITHSUNDEEP
enumsgraphqlnestjsprisma
fraktus
fraktus

Reputation: 133

Using enums from prisma in nestJS graphQL models

My object that is supposed to be returned:

@ObjectType()
export class User {
  @Field(() => String)
  email: string

  @Field(() => [Level])
  level: Level[]
}

Level is an enum generated by prisma, defined in schema.prisma:

enum Level {
  EASY
  MEDIUM
  HARD
}

Now I'm trying to return this User object in my GraphQL Mutation:

@Mutation(() => User, { name: 'some-endpoint' })

When running this code, I'm getting the following error:

UnhandledPromiseRejectionWarning: Error: Cannot determine a GraphQL output type for the "Level". Make sure your class is decorated with an appropriate decorator.

What am I doing wrong here? Can't enums from prisma be used as a field?

Upvotes: 4

Views: 4748

Answers (3)

Leonie Patricia RASOANAMBININA
Leonie Patricia RASOANAMBININA

Reputation: 1

I just put it key-value and it worked with prisma.

enum Role {
  USER = 'USER',
  ADMIN = 'ADMIN',
}

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

export class CreateUserInput {
@IsEnum(Role)
@Field(() => Role, { nullable: true })
role?: Role;
}

and do it like this in the service:

async create(createUserInput: CreateUserInput): Promise<User> {
    return this.prisma.user.create({
      data: {
        ...createUserInput,
      },
    });
  }

and It worked.Hope it help

Upvotes: 0

&#201;merson Felinto
&#201;merson Felinto

Reputation: 543

Of course, you can.

import { Level } from '@prisma/client'

@ObjectType()
export class User {
  @Field(() => String)
  email: string

  @Field(() => Level)
  level: Level
}

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

You should use registerEnumType + @Field(() => Enum)

https://docs.nestjs.com/graphql/unions-and-enums#enums

Upvotes: 8

skink
skink

Reputation: 5736

You're probably missing the registration of the enum type in GraphQL:

// user.model.ts
registerEnumType(Level, { name: "Level" });

Upvotes: 1

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