findUnique query returns null for array fields - prisma

Question

I read the Prisma Relations documentation and it fixed my findMany query which is able to return valid data but I'm getting inconsistent results with findUnique.
Schema
model User {
id Int #id #default(autoincrement())
fname String
lname String
email String
password String
vehicles Vehicle[]
}
model Vehicle {
id Int #id #default(autoincrement())
vin String #unique
model String
make String
drivers User[]
}
Typedefs
const typeDefs = gql'
type User {
id: ID!
fname: String
lname: String
email: String
password: String
vehicles: [Vehicle]
}
type Vehicle {
id: ID!
vin: String
model: String
make: String
drivers: [User]
}
type Mutation {
post(id: ID!, fname: String!, lname: String!): User
}
type Query {
users: [User]
user(id: ID!): User
vehicles: [Vehicle]
vehicle(vin: String): Vehicle
}
'
This one works
users: async (_, __, context) => {
return context.prisma.user.findMany({
include: { vehicles: true}
})
},
However, for some reason the findUnique version will not resolve the array field for "vehicles"
This one doesn't work
user: async (_, args, context) => {
const id = +args.id
return context.prisma.user.findUnique({ where: {id} },
include: { vehicles: true}
)
},
This is what it returns
{
"data": {
"user": {
"id": "1",
"fname": "Jess",
"lname": "Potato",
"vehicles": null
}
}
}
I was reading about fragments and trying to find documentation on graphql resolvers but I haven't found anything relevant that can solve this issue.
Any insight would be appreciated! Thanks!

Answer 1

You need to fix the arguments passed to findUnique. Notice the arrangement of the { and }.
Change
return context.prisma.user.findUnique({ where: { id } },
// ^
include: { vehicles: true}
)
to
return context.prisma.user.findUnique({
where: { id },
include: { vehicles: true }
})