Mike Richards mjrichards91

DigitalOcean Ubuntu 14.04 x64 + Rails 4 + Nginx + Unicorn + PostgreSQL + Capistrano 3

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#Simple Authentication with Bcrypt

This tutorial is for adding authentication to a vanilla Ruby on Rails app using Bcrypt and has_secure_password.

The steps below are based on Ryan Bates's approach from Railscast #250 Authentication from Scratch (revised).

You can see the final source code here: repo. I began with a stock rails app using rails new gif_vault

##Steps

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

Render and Redirect

The normal controller/view flow is to display a view template corresponding to the current controller action, but sometimes we want to change that. We use render in a controller when we want to respond within the current request, and redirect_to when we want to spawn a new request.

Render

The render method is very overloaded in Rails. Most developers encounter it within the view template, using render :partial => 'form' or render @post.comments, but here we'll focus on usage within the controller.

	using Mobile.Droid.Renderers;
	using Xamarin.Forms;
	using Xamarin.Forms.Platform.Android;


	[assembly: ExportRenderer(typeof(Entry), typeof(CustomEntryRenderer_Droid))]
	namespace Mobile.Droid.Renderers
	{
	public class CustomEntryRenderer_Droid : EntryRenderer
	{

	// MIT License
	// Nicholas Ventimiglia
	// 2016-9-19

	using System;
	using System.Collections;
	using System.Collections.Generic;
	using System.Collections.ObjectModel;
	using System.Collections.Specialized;
	using System.Linq;

	using System;
	using Xamarin.Forms;
	using System.Collections;

	namespace YourNamespace.Views.Controls {
	public class BindablePicker : Picker
	{
	public BindablePicker()
	{
	this.SelectedIndexChanged += OnSelectedIndexChanged;

	// Update the appropriate href query string parameter
	function paramReplace(name, string, value) {
	// Find the param with regex
	// Grab the first character in the returned string (should be ? or &)
	// Replace our href string with our new value, passing on the name and delimeter
	var re = new RegExp("[\\?&]" + name + "=([^&#]*)"),
	delimeter = re.exec(string)[0].charAt(0),
	newString = string.replace(re, delimeter + name + "=" + value);

	return newString;

	<% flash.each do \|type, message\| %>
	<div class="alert <%= bootstrap_class_for(type) %> fade in">
	<button class="close" data-dismiss="alert">×</button>
	<%= message %>
	</div>
	<% end %>

	public interface IRemove
	{
	ICommand RemoveCommand { get; }
	}