GraphQL Schema Generator

A tool to generate GraphQL schemas from various data sources including JSON files, APIs, and MongoDB collections. The generated schemas can be output as both .graphql files and Python Graphene classes.

Features

• Generate GraphQL schemas from:
  • JSON files
  • REST APIs
  • MongoDB collections
• Convert schemas to:
  • .graphql files
  • Python Graphene classes
• Support for:
  • Nested objects
  • Arrays
  • Custom types
  • Complex data structures

Installation

1. Clone the repository

git clone https://github.com/FajarWG/graphql-schema-generator.git

2. Install dependencies

cd graphql-schema-generator
npm install

Usage

1. JSON/API to GraphQL Schema

Edit the configRest.js file to customize which json or Rest API endpoint will be generated to the graphql schema.

[
  {
    type: "file",
    path: path.join(__dirname, "/dumpJson/input.json"),
    typeName: "UserData",
  },
  {
    type: "api",
    url: "https://api.example.com/data",
    typeName: "ApiData",
  },
];

To generate, just do the command:

npm run generate

2. MongoDB to GraphQL Schema

Configure your MongoDB connection in configDb.js:

module.exports = {
  mongodb: {
    uri: "mongodb://localhost:27017",
    dbName: "your_database",
    collections: ["collection1", "collection2"],
  },
};

Generate schema:

npm run generate:db

Output Examples

GraphQL Schema (.graphql)

type UserData {
  id: ID!
  name: String!
  email: String!
  age: Int!
}

type NestedData {
  items: [ItemType!]!
  count: Int!
}

type ItemType {
  id: String!
  value: Float!
}

Python Graphene Classes (.py)

import graphene

class UserData(graphene.ObjectType):
    id = graphene.ID()
    name = graphene.String()
    email = graphene.String()
    age = graphene.Int()

class ItemType(graphene.ObjectType):
    id = graphene.String()
    value = graphene.Float()

class NestedData(graphene.ObjectType):
    items = graphene.List(ItemType)
    count = graphene.Int()

Requirements

• Node.js >= 14

Dependencies

• mongodb: MongoDB driver for Node.js

Contributing

1. Fork the repository
2. Create your feature branch
3. Commit your changes
4. Push to the branch
5. Create a new Pull Request

Authors

• Github: @FajarWG
• LinkedIn: @fajarwg
• Instagram: @fajarwgumelar