Graphql test

Graphql API Code Cookbook

Problem

Most of the APIs request an endpoint to access a predefined data structure. If you want to access other resources, it is necessary to request another endpoint, it makes the procces kind of tricky.

1. We only define a single endpoint (for example http://example/graphql).
2. Since this is a query language, all actions are done through a POST.

Solution

GraphQL allow us to retrieve only the data we need by using a query language for web APIs.

Recipe

CRUD GraphQL API with Nodejs, Express & MongoDB

1. Create a new directory to store the project, run npm init to configure the new project
2. Run npm install to create our package.json file
3. Create a server.js file (entry point for our server)

4. Create the src folder and the below required folders and files:

   1. Create src/schema directory and an index.js file (will contain the business logic)
   2. Create a src/resolvers directory and an index.js file.
   3. Create an src/models directory and a post.js which holds what a post should look like.

   ├── src
   │   ├── schema
   │   │   └── index.js
   │   ├── resolvers
   │   │   └── index.js
   │   └── models
   │       └── post.js
   ├── package-lock.json
   ├── package.json
   └── server.js
   

5. Install the dependencies

   Using npm

     # npm
     $ npm install --save express express-graphql graphql body-parser
   

   Using yarn

     # yarn
     $ yarn add --save express express-graphql graphql body-parser
   

   You can also install "nodemon" locally to avoid having to restart your server with each change
   

     $npm install --save-dev nodemon
   

   Also you need to update your "package.json" for using "nodemon".
   

     "scripts": { "start": "nodemon server.js"}