Prisma the ORM that node was waiting for

Luca Del Puppo - Senior Software Engineer
Prisma the ORM that node was waiting for

Luca Del Puppo
Senior Software Engineer
Javascript Enthusiastic
Typescript Lover
“Youtuber”
“Writer”
Love sport: running, hiking
Love animals

Agenda
. What is it?
. CLI
. Data Modeling
. Generation
. Client
. Migration
. Deploy
. Conclusion

Prisma is an open source next-generation ORM.
(Node eco-system)

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

Control
Productivity
Orm
Plain SQL
SQL Builder
Prisma
Healty Constraint

Providers
PostgreSQL
MySQL
SQLite
Microsoft SQL Server
MongoDB
CockroachDB

Hey Bro!
Could you talk about
interesting stu ?
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Prisma File
generator client {
provider = "prisma-client-js"
}
datasource db {
provider = "postgresql"
url = env("DATABASE_URL")
}
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CLI commands
init
generate
migrate

Schema
One le (schema.prisma)
Data sources
Generators
Data model de nition
Syntax - PSL (Prisma Schema Language)
N.B. Multiple Files is not supported yet

Generator & DataSource
generator client {
}
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datasource db {
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}
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datasource db {
}
generator client {
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}
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Models
model Ingredient {
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id Int @id @default(autoincrement())
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name String
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createdAt DateTime @default(now())
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updatedAt DateTime @updatedAt
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pizzaIngredients PizzaIngredient[]
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@@map("INGREDIENTS")
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}
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model Ingredient {
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name String
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}
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model Ingredient {
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name String
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}
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model Ingredient {
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name String
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}
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model Ingredient {
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name String
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}
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model Ingredient {
name String
}
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Relations
ingredientId Int
ingredient Ingredient @relation(fields: [ingredientId], references: [id])
model PizzaIngredient {
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pizzaId Int
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pizza Pizza @relation(fields: [pizzaId], references: [id])
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@@id([pizzaId, ingredientId])
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@@map("PIZZA_INGREDIENTS")
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}
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pizzaId Int
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ingredientId Int
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}
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ingredientId Int
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pizzaId Int
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}
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ingredientId Int
pizzaId Int
}
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What does it generate?
Models
Convert Models to Typescript Types
Client
Query Models (type safe)
Constraint to build where clause
Constraint to build select
Constraint to build insert/update/delete with relation

Generated Type
export type Ingredient = {
id: number
name: string
createdAt: Date
updatedAt: Date
}
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What does it generate?
const prisma = new PrismaClient();
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await prisma.$connect();
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const pizza = await prisma.pizza.findUnique({
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where: {
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id: id,
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},
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include: {
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pizzaIngredients: {
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include: {
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ingredient: true,
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},
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},
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},
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});
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where: {
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id: id,
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},
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include: {
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pizzaIngredients: {
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include: {
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ingredient: true,
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},
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},
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},
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});
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where: {
id: id,
},
include: {
pizzaIngredients: {
include: {
ingredient: true,
},
},
},
});
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where: {
id: id,
},
include: {
pizzaIngredients: {
include: {
ingredient: true,
},
},
},
});
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Crud
SQLPrisma Single Multiple
Insert create createMany
Update update updateMany
Delete delete deleteMany
Select ndUnique/
ndFirst
ndMany
Insert/
Update
upsert

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Aggregation
Aggregate
Count
GroupBy

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Prisma Schema Prisma CLI Database
1. update
2. prisma migrate dev
3. read schema
4. database schema
5. generate migration
6. update database
Migration ow

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Prisma Schema
Prisma CLI Database
2. prisma db pull
Introspection ow
1. Change database schema (SQL)
3. read schema
4. database schema
5. Update

Limitations
MongoDb is not supported (use prisma db push)
Switch DB Provider is not supported

Seeding
Prisma exposes us a command for seeding the db
It runs on
prisma migrate dev
prisma migrate reset
manually
It can be written in typescript, go, sql…
--skip-seed allows skipping

N.B. Use a CI/CD ow for your deployment

Demo
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Cons
Newby
Don’t manage multiple provider concurrency
Splitting schema not implemented out-of-the-box (prisma-
aurora)

Pros
Wonderful developer experience
Type safe queries
Migrations
Custom queries
Active Community
Awesome documentation
Core team active in Github and Slack

Slides
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Prisma Series
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We are hiring
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Luca Del Puppo
@puppo92
Luca Del Puppo
Puppo_92
@puppo

Prisma the ORM that node was waiting for

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