Prisma resolves only the last element of a nested `include` query

Bug description

Not sure if I’m missing something or there is a bug.

I have a basic localization design for a Project entity (including only relevant parts of the schema):

Prisma schema

model Partner {
  revisionId          BigInt               @id @default(autoincrement()) @map(name: "revision_id")
  id                  Int                  @default(autoincrement())
  createdAt           DateTime             @default(now()) @map(name: "time") @db.Timestamptz(6)
  updatedAt           DateTime             @default(now()) @updatedAt @map("updated_at") @db.Timestamptz(6)
  name                String
  logo                String?
  projectPartnerTypes ProjectPartnerType[]

  @@map(name: "audit_organization")
}

model Project {
  id                     BigInt                         @id @default(autoincrement())
  createdAt              DateTime                       @default(now()) @map(name: "created_at") @db.Timestamptz(6)
  updatedAt              DateTime                       @default(now()) @updatedAt @map("updated_at") @db.Timestamptz(6)
  published              Boolean                        @default(false)
  translations           ProjectTranslation[]

  @@map(name: "projects")
}

model ProjectPartnerType {
  id                   BigInt              @id @default(autoincrement())
  createdAt            DateTime            @default(now()) @map(name: "created_at") @db.Timestamptz(6)
  updatedAt            DateTime            @default(now()) @updatedAt @map("updated_at") @db.Timestamptz(6)
  priority             Int                 @default(1)
  name                 String
  projectTranslationId BigInt              @map("project_translation_id")
  projectTranslation   ProjectTranslation? @relation(fields: [projectTranslationId], references: [id])
  partners             Partner[]

  @@map(name: "project_partner_types")
}

model ProjectTranslation {
  id                  BigInt                      @id @default(autoincrement())
  projectId           BigInt                      @map(name: "project_id")
  locale              Locale
  name                String
  contactEmail        String?                     @map(name: "contact_email")
  partnerTypes        ProjectPartnerType[]
  project             Project?                    @relation(fields: [projectId], references: [id])

  @@unique([projectId, locale])
  @@map(name: "project_translations")
}

I have a resolver for the Project entity:

GraphQL resolver

project: async (
      _root: any,
      { id, published, locale }: QueryProjectArgs
    ): Promise<Project | null> => 
      prisma.project.findFirst({
        where: {
          AND: [
            { id },
            published === true
              ? {
                  published: true,
                }
              : {},
          ],
        },
        include: {
          translations: {
            where: locale ? { locale } : {},
            include: {
              partnerTypes: {
                include: {
                  partners: true,
                },
              },
            },
          },
        },
      }),

Application has 2 locales: sk-SK and cs-CZ. And if you don’t pass the locale param to this resolver, it should return project with all translations. Which it does, except it doesn’t resolve nested partners inclusion for all translations, it does so only for the last element of the resulted project.translations array. Below are sample queries with their results:

1. When locale is specified

query {
  project(id: 20, locale: sk) {
    translations {
      id
      partnerTypes {
        id
        partners {
          id
          name
        }
      }
    }
  }
}

Result

{
  "data": {
    "project": {
      "translations": [
        {
          "id": 39,
          "partnerTypes": [
            {
              "id": 108,
              "partners": [
                {
                  "id": 5,
                  "name": "Johns and Sons"
                },
                {
                  "id": 12,
                  "name": "Pollich - Zieme"
                },
                {
                  "id": 14,
                  "name": "Grant, Cole and Waelchi"
                }
              ]
            },
            {
              "id": 109,
              "partners": [
                {
                  "id": 1,
                  "name": "Willms - Renner"
                },
                {
                  "id": 4,
                  "name": "Kiehn, Mante and Greenholt"
                },
                {
                  "id": 6,
                  "name": "Miller, Kohler and Doyle"
                },
                {
                  "id": 9,
                  "name": "Goodwin - Stokes"
                },
                {
                  "id": 10,
                  "name": "Mayert - Morissette"
                },
                {
                  "id": 13,
                  "name": "King - Bergnaum"
                },
                {
                  "id": 17,
                  "name": "Morissette - Grimes"
                }
              ]
            },
            {
              "id": 110,
              "partners": [
                {
                  "id": 7,
                  "name": "Schaden and Sons"
                },
                {
                  "id": 16,
                  "name": "Medhurst Group"
                },
                {
                  "id": 18,
                  "name": "Huels - Lemke"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}

Partner type ids: 108, 109, 110.

2. When locale is not specified

Same query without locale param:

query {
  project(id: 20) {
    translations {
      id
      partnerTypes {
        id
        partners {
          id,
          name
        }
      }
    }
  }
}

Result

{
  "data": {
    "project": {
      "translations": [
        {
          "id": 39,
          "partnerTypes": [
            {
              "id": 108,
              "partners": []
            },
            {
              "id": 109,
              "partners": []
            },
            {
              "id": 110,
              "partners": []
            }
          ]
        },
        {
          "id": 40,
          "partnerTypes": [
            {
              "id": 111,
              "partners": []
            },
            {
              "id": 112,
              "partners": [
                {
                  "id": 1,
                  "name": "Willms - Renner"
                },
                {
                  "id": 4,
                  "name": "Kiehn, Mante and Greenholt"
                },
                {
                  "id": 5,
                  "name": "Johns and Sons"
                },
                {
                  "id": 6,
                  "name": "Miller, Kohler and Doyle"
                },
                {
                  "id": 8,
                  "name": "Reynolds, Vandervort and Abbott"
                },
                {
                  "id": 9,
                  "name": "Goodwin - Stokes"
                },
                {
                  "id": 10,
                  "name": "Mayert - Morissette"
                },
                {
                  "id": 11,
                  "name": "Schinner - Spencer"
                },
                {
                  "id": 12,
                  "name": "Pollich - Zieme"
                },
                {
                  "id": 13,
                  "name": "King - Bergnaum"
                },
                {
                  "id": 14,
                  "name": "Grant, Cole and Waelchi"
                },
                {
                  "id": 15,
                  "name": "Tillman, Fritsch and Raynor"
                },
                {
                  "id": 17,
                  "name": "Morissette - Grimes"
                }
              ]
            },
            {
              "id": 113,
              "partners": [
                {
                  "id": 7,
                  "name": "Schaden and Sons"
                },
                {
                  "id": 16,
                  "name": "Medhurst Group"
                },
                {
                  "id": 18,
                  "name": "Huels - Lemke"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}

I feel like I’m missing something obvious here…

How to reproduce

1. Create a schema as described above.
2. Write a resolver with a nested include.
3. Run resolver.
4. Receive incomplete data.

Expected behavior

To get all data, including deeply nested fields.

Prisma information

Environment & setup

• OS: Mac OS
• Database: PostgreSQL
• Node.js version: 14.15.4

Prisma Version

v3.3.0

[nizadin]

Resolved in 3.7.0

[nizadin]

Issue still persists on version 3.5.0.