nest-graph-ql

Nestjs GraphQL

Example demonstrating how to build a GraphQL CRUD application using Nestjs and MongoDB. For an in-depth explanation of the application and the basic Nestjs concepts, you can follow this article.

Requirements

• NodeJS
• MongoDB database

Getting started

Installing dependencies

First, you need to install all the needed dependencies.

$ npm install

Configuring the database

Before starting the application, you will need to create a MongoDB database and edit the connection string in the app.modules.ts file to match your database configuration. The repository includes a Docker-Compose file that helps you start MongoDB.

docker-compose up

The default database configuration in the app.module.ts file looks like this:

@Module({
  imports: [MongooseModule.forRoot('mongodb://localhost/nest')],
})

If you are not running the database on your local machine, replace localhost with the correct IP-Address.

Starting the application

After installing the dependencies, you can run the application using one of the following commands.

# development
$ npm run start

# watch mode
$ npm run start:dev

# production mode
$ npm run start:prod

Testing the application

After starting the application you can start using it by either opening the GraphQL playground on http://localhost:3000/graphql or sending a request through an HTTP client like Postman or Insomnia.

Creating an item

mutation {
  createItem(input: {title: "item", price: 10, description: "test"}) {
    title
    price
    description
    id
  }
}

Getting all items

{
  items {
    title,
    price,
    description,
    id
  }
}

Updating item

mutation {
  updateItem(id: "ID", input: {title: "item123", price: 10, description: "test123"}) {
    title
    price
    description
    id
  }
}

Deleting item

mutation {
  deleteItem(id: "ID") {
    title
    price
    description
    id
  }
}