Get ready to master the art of building APIs that will be the backbone of your applications. By harnessing the power of Node.js, Prisma ORM, and Postgres, you’ll be well on your way to crafting exceptional user experiences.
Let’s embark on this exciting journey together!
Here’s what we’ll be exploring:
Npm i prisma express ts-node typescript @prisma/client"Dev":"nodemon index.ts"1. Using the Prisma CLI, we can add Prisma to our Node project. Use the following command.
Npx prisma init –datasource-provider postgresqlYou may add a database here by using the –datasource-provider flag. I’m using a PostgreSQL database as an example, but you can use any database that Prisma supports.
The.env file and the Prisma folder, which contains your migration files, are the first two files that Prisma will generate in your project when you run the aforementioned instruction.
Inside the .env file, there is one key called DATABASE_URL you need to add your database url there.
Inside the Prisma folder, you will get a schema.prisma file inside which you can add your database models and structure.
Let’s create a database schema inside prisma.schema file:
We’ll use a user and post example where the user can have numerous posts, essentially a one-to-many relationship.
generator client {
provider = "prisma-client-js"
}
datasource db {
provider = "postgresql"
url = env("DATABASE_URL")
}
model User {
id String @id @default(uuid())
email String @unique
name String
role ROLE @default(USER)
posts Post[]
}
model Post {
id String @id @default(uuid())
user User @relation(fields: [authorId], references: [id])
authorId String
title String
published Boolean @default(false)
createdAt DateTime @default(now())
updatedAt DateTime @updatedAt
}
enum ROLE {
USER
ADMIN
}Related read: Mastering Prisma ORM in Node.js: A Comprehensive Guide
Npx prisma migrate dev -name "schema-creation"This command will create a migration file inside prisma/migrations folder with the name “schema-creation” and then execute the migration.
Let’s start with creating some endpoints and running SQL queries on our database using Prisma.
import { PrismaClient } from "@prisma/client";
import express from "express";
const prisma = new PrismaClient();
const app = express();
app.use(express.urlencoded({ extended: true }));
app.use(express.json());
//Add user
app.post("/add-user", async (req, res) => {
const user = await prisma.user.create({
data: {
email: req.body.email,
name: req.body.name,
},
});
res.json(user);
});
//Add Post
app.post("/add-post", async (req, res) => {
const data = await prisma.post.create({
data: {
title: req.body.title,
authorId: req.body.authorId,
},
});
res.json(data);
});
//Get users
app.get("/users", async (req, res) => {
const data = await prisma.user.findMany();
res.json(data);
});
//Get post
app.get("/posts", async (req, res) => {
const data = await prisma.post.findMany();
res.json(data);
});
//Update user
app.put("/update-user", async (req, res) => {
const data = await prisma.user.update({
data: {
name: req.body.name,
},
where: {
email: req.body.email,
},
});
res.json(data);
});
//Delete post
app.delete("/delete-post", async (req, res) => {
const data = await prisma.post.delete({
where: {
id: req.body.id,
},
});
res.json(data);
});
app.listen(3000, () => {
console.log("Server running 3000");
});
In essence, Node.js, Prisma, and PostgreSQL form a powerful synergy for crafting RESTful APIs. Node.js’s asynchronous nature makes it ideal for handling numerous API requests efficiently. Prisma acts as an elegant abstraction layer, streamlining interaction with the PostgreSQL database. PostgreSQL itself boasts robust features and security for managing your application’s data.
This combination empowers you to streamline development, concentrate on core functionalities, and construct robust APIs that seamlessly handle data interactions for your web application. Equipped with this knowledge, you’re prepared to create modern, scalable APIs that fuel your upcoming project.
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