01 Setting Up Prisma New Database GO G002 - Prisma1

import QueryChooser from 'components/Markdown/QueryChooser' import Code from 'components/Markdown/Code'

export const meta = { title: 'Set up Prisma', position: 1, gettingStartedOrder: 1, gettingStartedTitle: 'New database', nextText: 'Great work! 👏 Move on to learn how you can change your datamodel and (re-)generate your Prisma client.', technology: 'go', technologyOrder: 4, articleGroup: 'Set up Prisma', }

Goals

On this page, you will learn how to:

Install the Prisma CLI
Set up Prisma using Docker
Configure your Prisma API
Generate the Prisma client
Read and write data using the Prisma client

Install the Prisma CLI

The Prisma CLI is used for various Prisma workflows. You can install it using Homebrew or NPM:

bash

brew tap prisma/prisma
brew install prisma

bash

npm install -g prisma

</Code>

Install Docker

To use Prisma locally, you need to have Docker installed on your machine. If you don't have Docker yet, you can download the Docker Community Edition for your operating system here.

Don't want to use Docker? You can also get started with a demo database for now.

Set up and connect Prisma with a database

Create new directory

bash

mkdir hello-world
cd hello-world

Create Docker Compose file

To launch Prisma on your machine, you need a Docker Compose file that configures Prisma and specifies the database it can connect to.

bash

touch docker-compose.yml

Add Prisma and database Docker images

Paste the following contents into the Docker Compose file you just created:

yml

version: '3'
services:
  prisma:
    image: prismagraphql/prisma:1.21
    restart: always
    ports:
    - "4466:4466"
    environment:
      PRISMA_CONFIG: |
        port: 4466
        databases:
          default:
            connector: mysql
            host: mysql
            port: 3306
            user: root
            password: prisma
            migrations: true
  mysql:
    image: mysql:5.7
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: prisma
    volumes:
      - mysql:/var/lib/mysql
volumes:
  mysql: ~

yml

version: '3'
services:
  prisma:
    image: prismagraphql/prisma:1.21
    restart: always
    ports:
    - "4466:4466"
    environment:
      PRISMA_CONFIG: |
        port: 4466
        databases:
          default:
            connector: postgres
            host: postgres
            port: 5432
            user: prisma
            password: prisma
            migrations: true
  postgres:
    image: postgres:10.5
    restart: always
    environment:
      POSTGRES_USER: prisma
      POSTGRES_PASSWORD: prisma
    volumes:
      - postgres:/var/lib/postgresql/data
volumes:
  postgres: ~

</Code>

You can switch between MySQL and PostgreSQL by using the tabs above the code block.

Launch Prisma and the connected database

To start Prisma and launch the connected database, run the following command:

bash

docker-compose up -d

Prisma is now connected to a local database and runs on http://localhost:4466.

Configure your Prisma API

To bootstrap the configuration files for your Prisma client run the following command:

bash

prisma init --endpoint http://localhost:4466

The endpoint needs to match the URL of a running Prisma server.

Deploy the Prisma API

The prisma init command created the minimal setup needed to deploy the Prisma API: prisma.yml and datamodel.prisma.

With these configuration files, you can now deploy the Prisma API:

bash

prisma deploy

Congratulations, you have successfully set up Prisma. You can now start using the Prisma client to talk to your database from code.

Generate your Prisma client

The Prisma client is a custom, auto-generated library that connects to your Prisma API. Append the following lines to the end of your prisma.yml:

yml

generate:
  - generator: go-client
    output: ./generated/prisma-client/

Now generate the client with this command:

bash

prisma generate

The CLI now stored your Prisma client inside the ./generated/prisma-client/ directory as specified in prisma.yml.

Prepare Go application

bash

touch index.go

You'll be using dep for dependency management in this tutorial. Run the following command to create the required setup:

bash

dep init

Great, you're now ready to write some code and talk to your database programmatically!

Read and write data using the Prisma client

Add the following code in index.go:

package main

import (
	"context"
	"fmt"
	prisma "hello-prisma/generated/prisma-client"
)

func main() {
	client := prisma.New(nil)
	ctx := context.TODO()

	// Create a new user
	name := "Alice"
	newUser, err := client.CreateUser(prisma.UserCreateInput{
		Name: name,
	}).Exec(ctx)
	if err != nil {
		panic(err)
	}
	fmt.Printf("Created new user: %+v\\n", newUser)

	users, err := client.Users(nil).Exec(ctx)
	if err != nil {
		panic(err)
	}
	fmt.Printf("%+v\\n", users)
}

Before executing the script, you need to ensure all dependencies are available. Run the following command:

bash

dep ensure

Now execute the script with the following command:

bash

go run index.go

Whenever you run the script with that command, a new user record is created in the database (because of the call to createUser).

Feel free to play around with the Prisma client API and try out some of the following operations by adding the following code snippets to the file (at the end of the main function) and re-executing the script:

id := "__USER_ID__"
userById, err := client.User(prisma.UserWhereUniqueInput{
  ID: &id,
}).Exec(ctx)

filter := "Alice"
posts, err := client.Users(&prisma.UsersParams{
  Where: &prisma.UserWhereInput{
    Name: &filter,
  },
}).Exec(ctx)

id := "__USER_ID__"
newName := "Bob"
updatedUser, err := client.UpdateUser(prisma.UserUpdateParams{
  Where: prisma.UserWhereUniqueInput{
    ID: &id,
  },
  Data: prisma.UserUpdateInput{
    Name: &newName,
  },
}).Exec(ctx)

id := "__USER_ID__"
deletedUser, err := client.DeleteUser(prisma.UserWhereUniqueInput{
  ID: &id,
}).Exec(ctx)

</QueryChooser>

In some snippets, you need to replace the __USER__ID__ placeholder with the ID of an actual user.