GraphQL_POC

The following repo is a proof of concept built to explore in depth GraphQL. It's built on top of graphql.js and express-graphql. Its presentation can be found at: https://drive.google.com/open?id=1u3k0rPZwdEmFZvMMchBfL854Vic8aIXIkv4TY6W4oKU

Areas Yet To Explore

1. Authentication and Authorization.
2. Usage as Data Access Layer.
3. Custom Logging in the pipeline.

STEUP AND RUNNING

1. Clone the repo.
2. install the dependencies

   npm install
   

3. Start the application

   npm run dev
   

4. Browse the url: http://localhost:3000/graphql

Interesting Queries

Get 10 users.

query getUsers {
  users(take: 10) {
    firstname
  }
}

Create a user.

mutation create($userData: userInput) {
  createUser(user: $userData){
    firstname
  }
}

{
  "userData": {
    "username": "testing_username",
    "firstname": "testing_firstname",
    "lastname": "testing_lastname",
    "emailId": "eeaassd@gmail.com",
    "gender": "M",
    "age": 12
  }
}

Usage of fragments

query someQuery($gender: String = "M") {
      kingUser: users(take: 5,gender: $gender) {
			...someFragments
  }
}

query secondQuery{
  someUser: users(take:5,firstname: "Shadab",gender: "M") {
    ...someFragments
  } 
}


fragment someFragments on User {
    firstname,
    gender,
    age,
    userId,
    emailId
}

Usage of graphQL as ORM TOOL

Prisma is a library that aims to replace traditional orm tools with the usage of graphQL. Currently they main feature are:

1. Cross database operations
2. High-performance data layer
3. Out-of-the-box CRUD operations
4. GraphQL subscriptions.

Additional Resources

*. GraphQL: https://graphql.github.io/
*. Online GraphQL Playground: https://github.com/graphql/graphiql
*. Prisma: https://www.prisma.io/
*. GraphQL at Faccebook: https://www.youtube.com/watch?v=etax3aEe2dA
*. Tutorial on FullStack GraphQL: https://www.howtographql.com/