Next.js 15 Fullstack Web Apps · Pelajaran

Operasi CRUD dengan Prisma Client

Jalankan operasi Create, Read, Update, dan Delete menggunakan Prisma Client yang aman berdasarkan tipe.

Operasi CRUD dengan Prisma Client adalah pelajaran Next.js 15 Fullstack Web Apps gratis di CoddyKit. Ini adalah pelajaran 3 dari 4. Kamu bisa membaca pelajaran lengkapnya di bawah secara gratis — lalu praktikkan langsung di browser dengan editor kode bawaan dan tutor AI 24/7. Ini adalah bagian dari jalur belajar Next.js 15 Fullstack Web Apps, dan progresmu tersinkronisasi di web dan aplikasi CoddyKit. Kursus Next.js 15 Fullstack Web Apps mencakup 4 pelajaran total.

Bagian dari pelajaran ini belum diterjemahkan dan ditampilkan dalam bahasa Inggris.

Intro to CRUD with Prisma

Welcome! In this lesson, we'll master CRUD operations using Prisma Client. CRUD stands for Create, Read, Update, and Delete – the four fundamental operations for interacting with any database.

Prisma Client provides a type-safe and intuitive way to perform these actions, making your database interactions efficient and less error-prone.

Instantiating Prisma Client

Before performing any database operations, you need to instantiate the Prisma Client. This client is automatically generated based on your schema.prisma file and connects your application to the database.

You'll typically do this once in your application's entry point or a dedicated database module.

import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

async function main() {
  console.log('Prisma Client initialized!');
  // Database operations go here
}

main()
  .catch(e => {
    console.error(e);
    process.exit(1);
  })
  .finally(async () => {
    await prisma.$disconnect();
  });

Create: Adding New Data

The Create operation adds new records to your database. With Prisma, you use the create method on a model to insert data.

Specify the model (e.g., prisma.user).
Provide the data for the new record in the data object.
Prisma handles the SQL insertion for you!

Remember, this assumes you have a User model defined in your schema.prisma.

Create: Adding a User Record

Let's create a new User record. Notice how Prisma Client provides autocompletion for fields like email and name, ensuring type safety.

Run this example to see a new user being added.

import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

async function main() {
  console.log('Creating a new user...');
  const newUser = await prisma.user.create({
    data: {
      email: 'alice@example.com',
      name: 'Alice Smith',
    },
  });
  console.log('Created user:', newUser.name, 'with ID:', newUser.id);
}

main()
  .catch(e => {
    console.error(e);
    process.exit(1);
  })
  .finally(async () => {
    await prisma.$disconnect();
  });

Read: Fetching Multiple Records

The Read operation retrieves data. To fetch multiple records, use the findMany method. You can filter results using the where clause, order them with orderBy, or limit them with take.

For example, prisma.user.findMany({ where: { name: 'Alice Smith' } }) would find all users named Alice Smith.

Read: Fetching Single Records

To fetch a single, unique record, use findUnique. This method requires a unique identifier (like an @id or @unique field in your schema) to ensure only one record is returned.

If you need to find the first record matching a non-unique condition, use findFirst. It returns null if no record is found.

Read: Users from the Database

Let's fetch all users and then find a specific user by their email using findUnique. This demonstrates how to retrieve both lists and individual items.

Run the code to see the results of these queries.

import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

async function main() {
  console.log('Fetching all users...');
  const allUsers = await prisma.user.findMany();
  console.log('All users:', allUsers.map(u => u.name).join(', '));

  console.log('Finding user by unique email...');
  const alice = await prisma.user.findUnique({
    where: {
      email: 'alice@example.com',
    },
  });
  if (alice) {
    console.log('Found Alice:', alice.name);
  } else {
    console.log('Alice not found.');
  }
}

main()
  .catch(e => {
    console.error(e);
    process.exit(1);
  })
  .finally(async () => {
    await prisma.$disconnect();
  });

Update: Modifying Existing Data

The Update operation changes existing records. The update method requires two main parts:

A where clause to identify the record(s) to update.
A data object containing the fields and new values to set.

Always ensure your where clause is specific enough to avoid unintended updates!

Update: Changing a User's Name

We'll update the user 'Alice Smith' to 'Alicia Wonderland'. Notice how we target the user with their unique email and then provide the new name.

After running, you can try fetching Alice again to see the updated name.

import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

async function main() {
  console.log('Updating user Alice Smith...');
  const updatedUser = await prisma.user.update({
    where: {
      email: 'alice@example.com',
    },
    data: {
      name: 'Alicia Wonderland',
    },
  });
  console.log('Updated user:', updatedUser.email, 'now named:', updatedUser.name);
}

main()
  .catch(e => {
    console.error(e);
    process.exit(1);
  })
  .finally(async () => {
    await prisma.$disconnect();
  });

Delete: Removing Data

Finally, the Delete operation removes records from your database. The delete method, like update, requires a where clause to specify which record(s) to remove.

Be cautious with delete operations, as they are permanent! Always double-check your where condition.

CRUD Operations Check

Which Prisma Client method would you use to remove a specific user record from the database?

Recap: CRUD with Prisma

Great job! You've learned the core of database interaction using Prisma Client.

Create (C): Use prisma.model.create() to add new records.
Read (R): Use prisma.model.findMany() for lists, findUnique() or findFirst() for single records.
Update (U): Use prisma.model.update() to modify existing records.
Delete (D): Use prisma.model.delete() to remove records.

Prisma's type safety and intuitive API make these essential operations straightforward and robust in your Next.js applications.

Pertanyaan yang Sering Diajukan

Apakah pelajaran “Operasi CRUD dengan Prisma Client” gratis?

Ya — teks lengkap “Operasi CRUD dengan Prisma Client” gratis dibaca di sini di web. Untuk praktiknya secara interaktif (editor kode bawaan dan tutor AI 24/7) dan buka sisa kursus Next.js 15 Fullstack Web Apps, upgrade ke CoddyKit PRO. Kursus Next.js 15 Fullstack Web Apps mencakup 4 pelajaran total.

Apa yang akan aku pelajari di “Operasi CRUD dengan Prisma Client”?

Jalankan operasi Create, Read, Update, dan Delete menggunakan Prisma Client yang aman berdasarkan tipe. Kamu berlatih Next.js 15 Fullstack Web Apps dengan kode praktik yang langsung kamu jalankan di browser, dan tutor AI 24/7 menjawab pertanyaanmu saat kamu mengerjakan pelajaran ini.

Apakah aku perlu pengalaman untuk memulai Next.js 15 Fullstack Web Apps?

Tidak diperlukan pengalaman sebelumnya. Next.js 15 Fullstack Web Apps di CoddyKit dirancang untuk pemula hingga pelajar tingkat lanjut, jadi kamu bisa memulai di sini atau dari awal dan belajar sesuai kecepatan kamu sendiri. Ini adalah pelajaran 3 dari 4.

Berapa lama pelajaran “Operasi CRUD dengan Prisma Client” memakan waktu?

Sebagian besar pelajaran CoddyKit memakan waktu sekitar 5–10 menit. Setiap pelajaran ringkas dan interaktif, jadi kamu membuat kemajuan stabil dan melanjutkan dari tempat kamu tinggalkan di web dan aplikasi.

Bisakah aku menulis dan menjalankan kode dalam pelajaran Next.js 15 Fullstack Web Apps ini?

Ya. Setiap pelajaran Next.js 15 Fullstack Web Apps menyertakan editor kode bawaan, jadi kamu menulis dan menjalankan kode nyata langsung di browser dan mendapatkan umpan balik AI instan — tidak diperlukan penyiapan lokal.

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