Dimitri (Dimi) Tarasowski tarasowski

Tutorial: Designing a GraphQL API

This tutorial was created by Shopify for internal purposes. We've created a public version of it since we think it's useful to anyone creating a GraphQL API.

It's based on lessons learned from creating and evolving production schemas at Shopify over almost 3 years. The tutorial has evolved and will continue to change in the future so nothing is set in stone.

	const makeYMD = d =>
	d.getFullYear() + "-" + (d.getMonth() + 1) + "-" + d.getDate()

	const getYesterday = d =>
	makeYMD(new Date(d.setDate(d.getDate() - 1)))

	const dates = [
	{id: 1, date: makeYMD(new Date())},
	{id: 2, date: getYesterday(new Date())},
	{id: 3, date: makeYMD(new Date())}

	/* Rules:
	1. No If Statements (only ternary operators are allowed)
	2. Function has 0 or 1 Argument
	3. Function is a Single Return (can be as big as you like)
	4. No Assignments in Function
	5. No Side-Effects
	6. No Shared Variables
	*/

	// version #1

-# delete local tag '12345'
-git tag -d 12345
-# delete remote tag '12345' (eg, GitHub version too)
-git push origin :refs/tags/12345
-# alternative approach
-git push --delete origin tagName
-git tag -d tagName

	ShopTokenApi:
	Type: AWS::Serverless::Api
	Properties:
	StageName: prod
	DefinitionBody:
	swagger: 2.0
	info:
	title: !Sub ${AWS::StackName}
	securityDefinitions:
	custom-authorizer:

	const alphabetArray = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('')

	const generateLetterSequence = (start, end, alphabet) => {
	const positionStart = alphabet.indexOf(start)
	const positionEnd = alphabet.indexOf(end) + 1
	return alphabet.slice(positionStart, positionEnd)
	}

	const generateNumberSequence = (start, end) => {
	const numberArray = []

	curl -i -X GET -H "Content-Type:application/json" http://localhost:3000/ -d '{
	"userId": "jan001",
	"locationId": "001",
	"sortNumber": 100000,
	"sortNumberIncrement": 10,
	"warehouseStart": "a",
	"warehouseEnd": "b",
	"shelfNumberStart": 1,
	"shelfNumberEnd": 4,
	"shelfRowStart": "a",

	// dynamodb-adapter.js
	module.export.save = () => {
	// some code here
	return dynamodb.putItem(params).promise()
	}


	// lambda handler
	const save = require('./dynamo-adapter').save
	const parseUserIdentity = require('./parse-user')

	////******************************Async Version********************************************////

	// lambda function
	let response

	module.exports.handler = async(event) => {
	try {
	response = await Promise.resolve('Works')
	} catch (err) {
	console.log(err)