Imagine a scenario where there are two tables: User, which has fields for name and Id, and Post, which has fields for name and content. These tables are connected through a many-to-many relationship (meaning one post can have multiple users/authors and each user can have multiple posts).
For example:
model User {
id Int @id @default(autoincrement())
name String
posts users_to_posts[]
}
model Post {
id Int @id @default(autoincrement())
name String
users users_to_posts[]
}
model user_to_post {
user user? @relation(fields: [user_id], references: [id])
user_id Int
post signe? @relation(fields: [post_id], references: [id])
post_id Int
@@id([user_id, post_id])
}
The goal is to query the user table and retrieve the top 10 users based on the number of posts they have written.
However, the desired output should not just be a combination of user and post count, but include the user's Id and the total number of posts they have written as separate keys in the returned JSON.
An example using nextJS:
import { PrismaClient, Prisma } from '@prisma/client'
const prisma = new PrismaClient()
export default async function handler(req, res) {
const ret = await prisma.user.findMany({
include: {
posts: {
select: {
post: true
}
}
}
// include post count
// order by post count
// limit 10
});
res.status(200).json(ret)
}
In this case, there is no 'count' column in the table, so it needs to be calculated during the query process.
The current workaround involves parsing the JSON data obtained (the variable 'ret') and performing additional actions in TypeScript, which is not an ideal solution.