Graph SQL Server Example

This is a short example to help setup a GraphQL server on Node using Express and connect to Mongo DB using Mongoose.

Refer package.json's dependencies and devDependencies to see the npm packages and versions used.

Important Files and Folders

File/Folder	Description
index.html	The main HTML file
server.js	GraphQL Express Server
graphql	Folder related to graphQL Schema.
mongoose	Folder related to Mongoose(mongodb) Schema and Model

Pre-requisites for this example to work.

This example uses mongodb installed on the local machine.

• Refer Installation for instructions to install mongodb locally on your machine.
• MongoDb has only a CLI, so you can install any UI tools for mongodb so that its easier to work on the database. I have installed robomongo and find it perfect for my basic use cases.

Starting the GraphQL server

• Before running the example we start the mongo db service using the below command.

sudo service mongod start

• Once the service is up and running, then issue the below command to start your graph QL server. Note - babel-node is to be used in Dev environments only.

npm run dev3

Testing the server

• In this example we have a mongodb collection called TodoList which has the below schema:

    itemId: Number,
    item: String,
    completed: Boolean

• Once the server is up, go to browser and run http://localhost:3000/.
  • The first section is a simple form which you can use to insert a new task to the TodoList collection.

As this is a basic example, only the property item is taken from the html, while itemId and completed are hardcoded as 1 and false respectively.

• The second section is where we can see how GraphQL is used to GET value from TodoList where itemId = 1(hardcoded), by clicking on the link.