Prisma 2: Connecting record to implicit many to many table

Question

I am using Prisma 2 and am having trouble connecting existing records on a model that has an implicit many to many relationship with the connected model.

schema.prisma

model Event {
    id              Int             @id @default(autoincrement())
    performers      Performer[]
}

model Performer {
    id              Int             @id @default(autoincrement())
    events          Event[]
}

After running prisma migrations, I can see in postgres that I do have a join table created named _EventToPerformer . I have created some performers in my database, and when I try to create an event and connect those existing performers, I am not able to.

const performers = await prisma.performer.findMany()

const event = await prisma.event.create({
      data: {
        performers: performers.map((p) => ({ id: p.id })),
      },
      include: {
        performers: true,
      },
  });

For the above code, I am getting fairly cryptic typescript errors on the data property of the object I am passing in to the create function. When I suppress with @ts-ignore , I getting these prisma client errors:

Unknown arg `performers` in data.performers for type EventUncheckedCreateInput. Available args:

type EventUncheckedCreateInput {
      id?: Int
    }

Is there anything obvious I am missing when setting up an implicit many to many relationship, and/or attaching existing records to these models?

Answer 1

You are missing a connect . So you're code should look like:

const performers = await prisma.performer.findMany()

const event = await prisma.event.create({
      data: {
        performers: {
          connect: performers.map((p) => ({ id: p.id })),
        }
      },
      include: {
        performers: true,
      },
});

You can read more about working with relations here