GraphQL User Service

A lightweight GraphQL service built with Apollo Server for managing user data. This service includes functionality to:

• Retrieve user details by ID.
• Update a user's description.
• Add new users.

Features

Queries

• getUser(id: ID!): User Retrieve user details (username, description) by ID.

Mutations

• updateUserDescription(id: ID!, description: String!): User Update the description of an existing user.
• addUser(username: String!, description: String!): User Add a new user to the system.

Setup and Installation

Clone the repository:

Copy code

git clone https://github.com/dkdeptrai/graph_ql_exercise.git
cd graph_ql_exercise

Install dependencies:

npm install

Start the server:

node server.js

Access the GraphQL Playground:

• Visit http://localhost:4000 in your browser.

Usage

Example Queries and Mutations

Query: Retrieve User

query {
  getUser(id: "1") {
    username
    description
  }
}

Mutation: Update User Description

mutation ($updateUserDescriptionId: ID!, $description: String!) {
  updateUserDescription(
    id: $updateUserDescriptionId
    description: $description
  ) {
    id
    description
  }
}

Variables:

{
  "id": "1",
  "description": "A frontend developer"
}