findMany with include/select many-to-many relation results in empty array (bigint)

Bug description

I have a table Place and a table PlaceCategory with a _PlaceToPlaceCategory as relation table. When using the findMany with include/select: { categories: true } , the categories are empty (categories: []) for most of the records (for some of them is working as expected), even if they are linked in the relation table.

If I change the findMany options and I set the id: number in the where clause, categories are correctly extracted, also works with findUnique/findFirst:

Output:

How to reproduce

Create a table with a many-to-many relation and call findMany including the relation

Expected behavior

No response

Prisma information

My tables are defined as below:

model Place {
  id             BigInt              @id @unique(map: "id") @default(autoincrement()) @db.UnsignedBigInt
  address        String?             @db.VarChar(255)
  phone          String?             @db.VarChar(255)
  websiteUrl     String?             @db.VarChar(255)
  googlePlaceId  String?             @db.VarChar(255)
  creationDate   DateTime            @default(now()) @db.Timestamp(0)
  publishedDate  DateTime            @default(now()) @db.Timestamp(0)
  organisationId BigInt              @db.UnsignedBigInt
  authorId       BigInt?             @db.UnsignedBigInt
  archived       Boolean             @default(false)
  email          String?             @db.VarChar(255)
  mobilePhone    String?             @db.VarChar(255)
  onDemand       Boolean?
  title          String?             @db.VarChar(255)
  content        String?             @db.LongText
  attachmentId   BigInt?             @db.UnsignedBigInt
  isChanged      Boolean?
  favorite       Boolean             @default(false)
  targetType     String?             @db.VarChar(100)
  thumbnail      Attachment?         @relation(fields: [attachmentId], references: [id], onUpdate: Restrict, map: "Place_ibfk_6")
  author         User?               @relation(fields: [authorId], references: [id], onUpdate: Restrict, map: "Place_ibfk_5")
  organisation   Organisation        @relation(fields: [organisationId], references: [id], onDelete: Cascade, onUpdate: Restrict, map: "Place_ibfk_4")
  attachments    AttachmentToPlace[]
  openings       Opening?
  position       PlaceCoordinates?
  translations   PlaceLang[]
  editors        User[]              @relation("PlaceToEditor")
  categories     PlaceCategory[]

  @@index([authorId], map: "authorId")
  @@index([organisationId], map: "organisationId")
  @@index([attachmentId], map: "thumbnail")
}

model PlaceCategory {
  id                      BigInt                      @id @unique(map: "id") @default(autoincrement()) @db.UnsignedBigInt
  iconId                  Int?
  iconName                String?                     @db.VarChar(100)
  color                   String?                     @db.VarChar(7)
  organisationId          BigInt                      @db.UnsignedBigInt
  authorId                BigInt?                     @db.UnsignedBigInt
  parentId                BigInt?                     @db.UnsignedBigInt
  colorContrast           String?                     @db.VarChar(4)
  order                   Int?
  title                   String?                     @db.VarChar(255)
  author                  User?                       @relation(fields: [authorId], references: [id], onUpdate: Restrict, map: "PlaceCategory_ibfk_5")
  organisation            Organisation                @relation(fields: [organisationId], references: [id], onDelete: Cascade, onUpdate: Restrict, map: "PlaceCategory_ibfk_4")
  parentCategory          PlaceCategory?              @relation("PlaceCategoryToPlaceCategory_parentId", fields: [parentId], references: [id], onDelete: Cascade, onUpdate: Restrict, map: "PlaceCategory_ibfk_6")
  children                PlaceCategory[]             @relation("PlaceCategoryToPlaceCategory_parentId")
  channels                PlaceCategoryChannel?
  translations            PlaceCategoryLang[]
  subscriptionPreferences PlaceCategorySubscription[]
  place                   Place[]

  @@index([authorId], map: "authorId")
  @@index([organisationId], map: "organisationId")
  @@index([parentId], map: "parentId")
}

and this is my relation table:

Environment & setup

• OS: Mac OS 11.6
• Database: MySQL 5.7.26
• Node.js version: v14.19.2

Prisma Version

3.14.0

[iamel89]

FOUND! Error raises when using BigInt as id in schema! When using Int there is an expected behavior. But I have to use BigInt.

[cprieto]

This problem was fixed with https://github.com/prisma/prisma-engines/pull/3006 and it will be released with the new version of Prisma really soon.