Guillaume Grassiant GGrassiant

Create a Contact Form in Rails 5

2021 UPDATE: some parts of this tutorial are now out of date, please use Create a Contact Form in Rails 6 instead. The rails 5 / gmail version remains below for posterity.

This is a complete, step-by-step tutorial showing how to create a fully functional contact form in production in rails 5. Rather than reinvent things, the following borrows from the best available documentation and tutorials (most notably, this tutorial on making a contact form in development). The finished contact form can be viewed here.

	/*
	ERB template chunk from The Feed's display of emails:

	<section class="postings postings--feed-style" id="postings"
	data-controller="pagination" data-pagination-root-margin-value="40px">
	<%= render partial: "postings/snippet", collection: @page.records, as: :posting, cached: true %>

	<%= link_to(spinner_tag, url_for(page: @page.next_param),
	class: "pagination-link", data: { pagination_target: "nextPageLink", preload: @page.first? }) unless @page.last? %>
	</section>

	const useLazyMediaLoad = media => {
	const [url, setUrl] = useState<?string>(null)
	const targetRef = useRef<?HTMLElement>(null)

	useEffect(() => {
	if (!IntersectionObserver) {
	thumbLoader(media).then(setUrl)
	} else if (targetRef.current) {
	let observer = new IntersectionObserver(
	entries =>

	import React, { FC } from 'react'
	import { SWRConfig } from 'swr'
	import axios from 'axios'

	import { ProfileContainer } from './ProfileContainer'
	import './App.css'

	const fetcher = (url: string) =>
	axios(url).then(
	response =>

	/**
	* Creating objects with Classes
	* Versus objects with prototypes
	* Since JavaScript is not a Class-based language
	* what is happening behind the class syntax?
	*/

	let PersonC = class {
	constructor(nm, id) {
	this.name = nm;

	const SSkeletonPulse = styled.div`
	display: inline-block;
	height: 100%;
	width: 100%;
	background: ${props =>
	props.translucent
	? css`linear-gradient(-90deg, #C1C1C1 0%, #F8F8F8 50%, #C1C1C1 100%)`
	: css`linear-gradient(-90deg, #F0F0F0 0%, #F8F8F8 50%, #F0F0F0 100%)`};
	background-size: 400% 400%;
	animation: pulse 1.2s ease-in-out infinite;

	// Given an array of numbers, if the index is even, add.
	// If the index is odd, subtract.
	const addSubtractReducer = (total, current, index) =>
	(index % 2) === 0 ?
	total + current :
	total - current;

	const addSubtract = x => {
	const nums = [ ];

	// IntersectionObserver polyfill
	import 'intersection-observer'
	// *****************************

	import React, { Component } from 'react'

	export default class ImageLazyLoader extends Component {

	state = {
	isLoaded: false,

	JS_PUBLIC_API(JSType)
	JS_TypeOfValue(JSContext *cx, jsval v)
	{
	JSType type = JSTYPE_VOID;
	JSObject *obj;
	JSObjectOps *ops;
	JSClass *clasp;

	CHECK_REQUEST(cx);
	if (JSVAL_IS_VOID(v)) { // (1)