How can I create a nested item in the DB? - postgresql

Question

I am having several problems when I try to create a new user with a nested related table.
My schema is like this:
model User {
id Int #id #default(autoincrement())
username String #unique
email String #unique
avatar String #default("none")
role Role #default(USER)
password String
maxScore Int #default(0)
UserCategoryStats UserCategoryStats[]
}
model UserCategoryStats {
id Int #id #default(autoincrement())
user User #relation(fields: [userId], references: [id])
userId Int
category Category #relation(fields: [categoryId], references: [id])
categoryId Int
correctAnswers Int #default(0)
incorrectAnswers Int #default(0)
totalAnswers Int #default(0)
timesChosen Int #default(0)
}
And I am just trying to create an user with one(or more) UserCategoryStats like the docs say
Like this:
const newUser = await prisma.user.create({
data: {
username,
email,
password: hashedPassword,
UserCategoryStats: {
create: { //Here is the error
correctAnswers: 0,
incorrectAnswers: 0,
totalAnswers: 0,
timesChosen: 0,
},
},
},
include: {
UserCategoryStats: true,
},
});
This is giving me this Typescript error :
Type '{ correctAnswers: number; incorrectAnswers: number; totalAnswers: number; timesChosen: number; }' is not assignable to type '(Without<UserCategoryStatsCreateWithoutUserInput, UserCategoryStatsUncheckedCreateWithoutUserInput> & UserCategoryStatsUncheckedCreateWithoutUserInput) | ... 5 more ... | undefined'.
Type '{ correctAnswers: number; incorrectAnswers: number; totalAnswers: number; timesChosen: number; }' is not assignable to type 'undefined'
I have tried with multiple values but I simply dont know what is wrong. I am not able to create nested properties.
What am I doing wrong?

Answer 1

Considering the Prisma Query and Schema that you have shared there were no typescript errors, it can be that your PrismaClient is not in sync with the schema, you can execute npx prisma generate to verify if both are in sync.
Here's a working example:
main.ts
import { PrismaClient } from '#prisma/client';
const prisma = new PrismaClient({
log: ['query'],
});
async function main() {
const newUser = await prisma.user.create({
data: {
username: 'alice',
email: 'alice#prisma.io',
password: 'Prisma#111',
UserCategoryStats: {
create: {
//Here is the error
correctAnswers: 0,
incorrectAnswers: 0,
totalAnswers: 0,
timesChosen: 0,
},
},
},
include: {
UserCategoryStats: true,
},
});
console.log(newUser);
}
main()
.catch((e) => {
throw e;
})
.finally(async () => {
await prisma.$disconnect();
});
Response:
> ts-node index.ts
prisma:query BEGIN
prisma:query INSERT INTO "public"."User" ("username","email","avatar","password","maxScore") VALUES ($1,$2,$3,$4,$5) RETURNING "public"."User"."id"
prisma:query INSERT INTO "public"."UserCategoryStats" ("userId","correctAnswers","incorrectAnswers","totalAnswers","timesChosen") VALUES ($1,$2,$3,$4,$5) RETURNING "public"."UserCategoryStats"."id"
prisma:query SELECT "public"."User"."id", "public"."User"."username", "public"."User"."email", "public"."User"."avatar", "public"."User"."password", "public"."User"."maxScore" FROM "public"."User" WHERE "public"."User"."id" = $1 LIMIT $2 OFFSET $3
prisma:query SELECT "public"."UserCategoryStats"."id", "public"."UserCategoryStats"."userId", "public"."UserCategoryStats"."correctAnswers", "public"."UserCategoryStats"."incorrectAnswers", "public"."UserCategoryStats"."totalAnswers", "public"."UserCategoryStats"."timesChosen" FROM "public"."UserCategoryStats" WHERE "public"."UserCategoryStats"."userId" IN ($1) OFFSET $2
prisma:query COMMIT
{
id: 1,
username: 'alice',
email: 'alice#prisma.io',
avatar: 'none',
password: 'Prisma#111',
maxScore: 0,
UserCategoryStats: [
{
id: 1,
userId: 1,
correctAnswers: 0,
incorrectAnswers: 0,
totalAnswers: 0,
timesChosen: 0
}
]
}
Inserted Data: