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Defining Many-to-Many Associations in Sequelize

Reference: Sequelize docs on association

Let’s say we have two models: Films and Festivals

We know that a film can be shown at many film festivals and that, conversely, a festival can show many films. This is what is known as a many-to-many relationship.

Knowing this, we can set up our associations:

Note: these are pretty rough notes I made for my team on the fly as I was reading through some pages. Some could be mildly inaccurate but hopefully not terribly so. I might resort to convenient fiction & simplification sometimes.

My top contenders, mostly based on popularity / community etc:

Angular
Backbone
React
Ember

Mostly about MVC (or derivatives, MVP / MVVM).

Core concepts

Model

An object that stores data (data persistance layer abstraction).
Templates transforms models into HTML.
Same thing as Rails model.

Template

Converting libraries to Ember CLI addons

In this guide we will cover two main cases:

Ember specific library
vendor library

Ember library

The Ember library will assume that Ember has already ben loaded (higher in the loading order) and thus will assume it has access to the Ember API.

	service: my-api-gateway

	provider:
	name: aws
	runtime: nodejs6.10
	region: sa-east-1
	stage: v1
	deploymentBucket: ${env:DEPLOYMENT_BUCKET}
	iamRoleStatements:
	- Effect: Allow

	const { createLogger, format, transports } = require("winston");

	// https://github.com/winstonjs/winston#logging
	// { error: 0, warn: 1, info: 2, verbose: 3, debug: 4, silly: 5 }
	const level = process.env.LOG_LEVEL \|\| "debug";

	function formatParams(info) {
	const { timestamp, level, message, ...args } = info;
	const ts = timestamp.slice(0, 19).replace("T", " ");


	// Examples

	// Yes, "router.router" twice - this assumes that the router is being injected
	// into the component. Otherwise lookup 'router:main'
	// One of these will be of interest, figure out which one you want:
	this.get('router.router.state');
	this.get('router.router.state.params');

	this.get('container').lookup('controller:application').currentPath;

	<html>

	<head>
	<script src="clmtrackr.js"></script>
	<script src="model_pca_20_svm.js"></script>
	<script src="p5.js"></script>
	<script src="p5.dom.js"></script>
	<script>
	var ctracker;

	// 1. go to your twitter feed with tweets and replies
	// for example, mine was twitter.com/6a68/with_replies
	// 2. scroll all the way down to the bottom of the page.
	// I suppose you could automate this with JS, but I didn't.
	// this function will delete tweets you can delete, i.e. not retweets:
	function deleteTweets() {
	// find the next delete button in the DOM (next deletable tweet)
	// and click the delete button. I wanted to keep the first tweet,
	// which is why the index here is 1.
	if (!$('.js-actionDelete').length) {

	# detailed stats for an individual
	git log --shortstat --author=AUTHOR --since=9-1-2013 --until=9-30-2013 \| grep "files changed" \| awk '{files+=$1; inserted+=$4; deleted+=$6} END {print "files changed: ", files, "\nlines inserted: ", inserted, "\nlines deleted: ", deleted}'

	# commit numbers by author for the repo
	git log --pretty=format:%an --since=10-1-2011 \| awk '{ ++c[$0]; } END { for(cc in c) printf "%5d %s\n",c[cc],cc; }' \| sort -r

	# detailed stats per author, including contribution to the total change
	git log --numstat --since=8-1-2014 --until=8-31-2014 \| awk '
	function printStats(author) {
	printf "%s:\n", author