recommend/prisma/schema.prisma

// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "sqlite"
  url      = env("DATABASE_URL")
}

model Beatmap {
  id         Int    @id
  difficulty String

  beatmapset    BeatmapSet @relation(fields: [beatmapset_id], references: [id])
  beatmapset_id Int

  scores Score[]
}

model BeatmapSet {
  id            Int     @id
  artist        String
  artistUnicode String
  title         String
  titleUnicode  String
  ranked        Boolean

  scores   Score[]
  beatmaps Beatmap[]
}

model Score {
  id            Int        @id @default(autoincrement())
  accuracy      Float
  best_id       BigInt?
  created_at    DateTime
  score_id      BigInt?
  score         Int
  beatmap       Beatmap    @relation(fields: [beatmap_id], references: [id])
  beatmap_id    Int
  beatmapset    BeatmapSet @relation(fields: [beatmapset_id], references: [id])
  beatmapset_id Int
  user_id       Int

  transition_from Transition[] @relation("before")
  transition_to   Transition[] @relation("after")

  @@unique([user_id, beatmap_id, created_at, score])
}

model Transition {
  before    Score @relation("before", fields: [before_id], references: [id])
  before_id Int
  after     Score @relation("after", fields: [after_id], references: [id])
  after_id  Int

  user_id    Int
  ms_between BigInt

  @@id([before_id, after_id])
}