Theo's Typesafe Cult•2y ago

Prisma is not returning a type that has the property for the included relation

Hello, I am using prisma to query some data from my database where the name of the relatonship is data so the final record object looks something like this

{
  someThing1: string
  someThing2: string
  data: {
    somethingRelated: string
  }
}

{
  someThing1: string
  someThing2: string
  data: {
    somethingRelated: string
  }
}

The record returned from Prisma has the data but is typed to look like

{
  someThing1: string
  someThing2: string
}

{
  someThing1: string
  someThing2: string
}

Any idea why this might be? Is there something I have to do to extend the type with the related model?

5 Replies

Leonidas•2y ago

Show us your prisma schema please

Liam•2y ago

model Member {
    id                 String      @id
    email              String      @unique
    name               String
    joinDate           DateTime
    checkins           Checkin[]
    data               MemberData?
    extendedMemberData String
}

model MemberData {
    member             Member?  @relation(fields: [memberID], references: [id])
    memberID           String   @id
    major              String?
    classification     String?
    address            String?
}

model Member {
    id                 String      @id
    email              String      @unique
    name               String
    joinDate           DateTime
    checkins           Checkin[]
    data               MemberData?
    extendedMemberData String
}

model MemberData {
    member             Member?  @relation(fields: [memberID], references: [id])
    memberID           String   @id
    major              String?
    classification     String?
    address            String?
}

and then the prisma query looks like

return await prisma.member.findMany({
        include: {
            data: true,
        },
    });

return await prisma.member.findMany({
        include: {
            data: true,
        },
    });

Leonidas•2y ago

Have you migrated ur database and generated a new prisma client after adding the memberData relation?

Liam•2y ago

Yes, did some further research and found that Prisma actually does not generate types for the relationship, so I winded up using type MemberWithData = Prisma.MemberGetPayload<{ include: { data: true } }>; and then cast the results as this type. Not my favorite solution but it is working. https://github.com/prisma/prisma/discussions/10928

GitHub

Generated prisma types are missing relationships in their exported ...

Bug description So I am really not sure if this is a bug, my mistake or some really stupid feature. I started using prisma in force a few days ago and so far, I love it, but I am struggling to unde...

Leonidas•2y ago

Really weird. I query related rows all across my app and never had that problem Are you using a noSQL database?

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Prisma is not returning a type that has the property for the included relation