Error: NEXUS__UNKNOWN__TYPE was already defined and imported as a type, check the docs for extending types

[T-D3V]

I have a nextjs project which uses graphql as a middleware api, following error occurs:

Error

Server Error
Error: NEXUS__UNKNOWN__TYPE was already defined and imported as a type, check the docs for extending types

This error happened while generating the page. Any console logs will be displayed in the terminal window.
Call Stack
extendError
file:///workspace/node_modules/nexus/dist/builder.js (1123:12)
SchemaBuilder.addType
file:///workspace/node_modules/nexus/dist/builder.js (156:27)
SchemaBuilder.missingType
file:///workspace/node_modules/nexus/dist/builder.js (704:14)
SchemaBuilder.getOrBuildType
file:///workspace/node_modules/nexus/dist/builder.js (938:21)
SchemaBuilder.getOutputType
file:///workspace/node_modules/nexus/dist/builder.js (876:34)
SchemaBuilder.buildOutputField
file:///workspace/node_modules/nexus/dist/builder.js (798:60)
<unknown>
file:///workspace/node_modules/nexus/dist/builder.js (770:43)
Array.forEach
<anonymous>
SchemaBuilder.buildOutputFields
file:///workspace/node_modules/nexus/dist/builder.js (769:16)
fields
file:///workspace/node_modules/nexus/dist/builder.js (544:32)

package.json

{
  "name": "frontend",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "lint": "next lint"
  },
  "dependencies": {
    "@prisma/client": "^3.14.0",
    "apollo-server-micro": "^3.7.0",
    "graphql": "^16.5.0",
    "micro": "^9.3.4",
    "micro-cors": "^0.1.1",
    "next": "12.1.6",
    "nexus": "^1.3.0",
    "nexus-prisma": "^0.35.0",
    "react": "18.1.0",
    "react-dom": "18.1.0"
  },
  "devDependencies": {
    "@types/micro-cors": "^0.1.2",
    "@types/node": "17.0.33",
    "@types/react": "18.0.9",
    "@types/react-dom": "18.0.4",
    "autoprefixer": "^10.4.7",
    "eslint": "8.15.0",
    "eslint-config-next": "12.1.6",
    "postcss": "^8.4.13",
    "prisma": "^3.14.0",
    "tailwindcss": "^3.0.24",
    "typescript": "4.6.4"
  }
}

Schema.prisma

// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

generator client {
  provider = "prisma-client-js"
}

generator nexusPrisma {
  provider = "nexus-prisma"
}

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

///User model for application Users
model Users {
  ///UUID for every User String
  id          String      @id @default(uuid())
  ///createdAt for creation date DateTime
  createdAt   DateTime    @default(now())
  ///updatedAt for update date DateTime
  updatedAt   DateTime    @updatedAt
  ///email for Users is unique
  email       String      @unique
  ///password hash for Users
  password    String
  ///Roles for application from Enum Roles
  role        Roles       @default(USER)
  ///Relation with contact n to n
  contact     Contacts?   @relation(fields: [contactId], references: [id])
  ///Relation contactId for Contact relation n to n
  contactId   String?
}

enum Roles {
  USER
  ADMIN
}

model Contacts {
  id          String    @id @default(uuid())
  createdAt   DateTime  @default(now())
  updatedAt   DateTime  @updatedAt
  firstName   String
  lastName    String
  email       String    @unique
  phone       String
  addressLine String
  city        String
  zipCode     Int
  note        String
  user       Users?
  events      ContactsOnEvents[]  @relation(name: "guest")
  guests      ContactsOnEvents[]  @relation(name: "guestfrom")
}

model Events {
  id          String      @id @default(uuid())
  createdAt   DateTime    @default(now())
  updatedAt   DateTime    @updatedAt
  name        String
  startDate   DateTime
  EndDate     DateTime
  type        EventTypes  @default(HUNT)
  contacts    ContactsOnEvents[]
}

enum EventTypes {
  HUNT
  EVENT
}

model ContactsOnEvents {
  guest       Contacts  @relation(fields: [guestId], references: [id], name: "guest")
  guestId     String
  guestFrom   Contacts  @relation(fields: [guestFromId], references: [id], name:"guestfrom")
  guestFromId String
  event       Events    @relation(fields: [eventId], references: [id])
  eventId     String
  assignedAt  DateTime  @default(now())
  type        Types[]   

  @@id([guestId, eventId])
}

enum Types {
  HUNTER
  DRIVER
  SEEKER
}

Here's my file structure so you know what file to ask for if you need additional code.

So if you need aditional code feel free to ask me, but since I don't get why this error is happening. I don't even know what code to provide.

Thamks for the help.

[willpots]

Do you have your nexus object definitions handy? I'm seeing this issue too when I try and create a field on the nexus schema mapping to another collection.

model User {
  id     String   @id @default(auto()) @map("_id") @db.ObjectId
  homes  Home[]
}

model Home {
  id       String   @id @default(auto()) @map("_id") @db.ObjectId
  userId   String   @db.ObjectId
  user     User     @relation(fields: [userId], references: [id])
}

import {User as PrismaUser} from 'nexus-prisma';

const User = objectType({
  name: 'User', 
  definition: (t) {
    t.field(PrismaUser.id);
    t.field(PrismaUser.homes);
  }
}

/Users/potter/workspace/taxes/server/node_modules/nexus/src/builder.ts:1743
  return new Error(`${name} was already defined and imported as a type, check the docs for extending types`)
         ^
Error: NEXUS__UNKNOWN__TYPE was already defined and imported as a type, check the docs for extending types

[simonjoom]

I found this issue when upgrading prisma you need to look for type ${yourmodel}OrderByInput in your graphql code generated

and change it to ${yourmodel}OrderByWithRelationInput

because OrderByInput not exist for the last prisma then you can restart your app and have a try

[baconcheese113]

Getting same thing after attempting to migrate to nexus-prisma from nexus-prisma-plugin, not sure where to look

[AhmedElywa]

This bug means you are using a type that does not exist.

• nexus had an issue because it gives you NEXUS__UNKNOWN__TYPE instead of the type name.
• It's not a bug in nexus-prisma
• You need to review your code and find what type you use and you didn't create it.
• The nexus-prisma-plugin t.crud generated some inputs like XwhereInput, XorderByInput, and maybe you were using these inputs into your code when you move from nexus-prisma-plugin to nexus-prisma you will not have these types exist anymore so you will get an error.

[Frosty21]

Can we close this issue @T-D3V or any update on this? What do you define in your object types? @AhmedElywa is right this shouldn't be a bug its most likely you've define that object type more than once. comb through your code for a copy of name: '{model}' to find the one that is a duplicate.

[T-D3V]

Yep I'll close it I mean this was from a few months ago and a lot has changed so no need to keep this issue open.