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Prisma

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Prisma is an ORM for TypeScript, that allows you to define your database schema and models in a schema.prisma file, and then generate a type-safe client that can be used to interact with your database from your backend.

Check out What is Prisma? to get a better understanding of what Next.js is and how it works.

The Prisma Schema

Every project that uses a tool from the Prisma ORM toolkit starts with a Prisma schema file. The Prisma schema allows developers to define their application models in an intuitive data modeling language. It also contains the connection to a database and defines a generator :

Relational Databases

datasource db {
provider = "postgresql"
url = env("DATABASE_URL")
}
generator client {
provider = "prisma-client-js"
}
model Post {
id Int @id @default(autoincrement())
title String
content String?
published Boolean @default(false)
author User? @relation(fields: [authorId], references: [id])
authorId Int?
}
model User {
id Int @id @default(autoincrement())
email String @unique
name String?
posts Post[]
}

MongoDB

datasource db {
provider = "mongodb"
url = env("DATABASE_URL")
}
generator client {
provider = "prisma-client-js"
}
model Post {
id String @id @default(auto()) @map("_id") @db.ObjectId
title String
content String?
published Boolean @default(false)
author User? @relation(fields: [authorId], references: [id])
authorId String @db.ObjectId
}
model User {
id String @id @default(auto()) @map("_id") @db.ObjectId
email String @unique
name String?
posts Post[]
}

Main Features

  • Prisma Client: Auto-generated and type-safe query builder for Node.js & TypeScript
  • Prisma Migrate: Migration system
  • Prisma Studio: GUI to view and edit data in your database.

Useful Resources