GraphQL Apollo Server with Node.js and MongoDB

This is a backend project built with Node.js, Apollo Server, and MongoDB. It demonstrates the use of GraphQL for querying and mutating product data stored in a MongoDB database. The project features a simple API for managing product data with features like searching products by category or fetching individual products by their absolute URL.

Features

• GraphQL API: Queries and mutations for fetching product data.
• MongoDB Integration: Stores product data and allows CRUD operations.
• Apollo Server: A powerful GraphQL server for Node.js.
• Type Safety: The project is set up using TypeScript for type safety and maintainability.

Getting Started

Prerequisites

• Node.js (>= 14.x)
• MongoDB (either local or cloud-based like MongoDB Atlas)
• TypeScript (optional, but recommended for type safety)

Installation

1. Clone the repository:

   git clone https://github.com/aditipolkam/products-gql-server
   cd products-gql-server

2. Install dependencies:

   npm install

3. Set up your MongoDB connection in the .env file (or in the code itself) with the following environment variable:

   DB_URL=mongodb://localhost:27017/your-database-name

Running the Project

1. Compile TypeScript files (if applicable):

   tsc

2. Run the server:

   npm start

3. Open Apollo GraphQL Playground or use a tool like Postman to interact with your GraphQL API at http://localhost:4000.

GraphQL Queries and Mutations

Here are some example queries you can run in the GraphQL Playground:

1. Get all products:

   query {
     getProducts {
       productName
       brand
       price
       discountPrice
       imageUrl
       quantity
       category
       subCategory
       absoluteUrl
     }
   }

2. Get products by category:

   query {
     getProductByCategory(category: "Fruits & Vegetables") {
       productName
       brand
       price
       quantity
     }
   }

3. Get a product by absolute URL:

   query {
     getProductById(absoluteUrl: "https://www.bigbasket.com/pd/40075537/fresho-onion-2-kg/") {
       productName
       brand
       price
       discountPrice
     }
   }

Project Structure

• src/: Main application code

  • models/: Mongoose models for MongoDB
    • product.ts: Mongoose schema and model for products
  • resolvers/: GraphQL resolvers for queries and mutations
    • productResolvers.ts: Resolvers to fetch products and interact with the database
  • schemas/: GraphQL schema definitions
    • typeDefs.ts: Type definitions for the GraphQL API

• .env: Environment variables for the database connection