Gregg Pollack Gregg

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Screencasting Framework

The following document is a written account of the Code School screencasting framework. It should be used as a reference of the accompanying screencast on the topic.

Why you should care about screencasting?

You're probably aren't going to take the time to read this document if you're not interested, but there are a lot of nice side effects caused by learning how to create quality screencasts.

Communicating more effectively - At Envy Labs we produce screencasts for our clients all the time. Whether it's demoing a new feature or for a presentation for an invester, they're often much more effective and pleasent than a phone call or screen sharing.

	<% current_user.who_to_follow.limit(5).each do \|f\| %>
	<li><%= f.name %> - <%= link_to "Follow", follow_user_path(f) %></li>
	<% end %>

	# It's generally bad practice to have any code that queries your db right there in the view. You want to do the queries in your controller if at all possible.

	<% @who_to_follow.each do \|f\| %>
	<li><%= f.name %> - <%= link_to "Follow", follow_user_path(f) %></li>
	<% end %>

	# Lets talk about helpers! See once again your main twitter page

	# <div class="followers">
	# Followers
	# <span><%= @followers_count %></span>
	# <% @recent_followers.each do \|f\| %>
	# <a href="<%= user_path(f) %>">
	# <img src="<%= f.avatar.url(:thumb) %>" />
	# </a>
	# <% end %>

	# So you might have something like this:

	# <% @presenter.tweets.each do \|tweet\| %>
	# <div id="tweet_#{tweet.id}" class="<%= 'favorite' if current_user && tweet.is_a_favorite?(current_user) %>">
	# <%= tweet.status %>
	# </div>
	# <% end %>

	# Kinda ugly... this is a simple example of where you might want a block helper so our view becomes:

	# if we want to effectively leverage SEO on our website, we'll want to provide custom title, description, and keywords on some of the pages... one way we can do this is:

	# <!DOCTYPE html>
	# <html>
	# <head>
	# <title>Big Store <%= @title %></title>
	# <meta name="description" content="<%= @description \|\| "Selling the best chaps ..." %>">
	# <meta name ="keywords" content="<%= @keywords \|\| "chaps, cowboy shop, leather" %>">

	class ProductsController < ApplicationController

	# Objective

	Refactor the Users#follow action and move code into the User model. Create the follow method in the User model.

	# Before

	class UsersController < ApplicationController
	def follow
	@user = User.find(params[:id])


	<!DOCTYPE html>
	<html>
	<head>
	<title>Deleteme</title>
	<link href="/assets/application.css" media="screen" rel="stylesheet" type="text/css" />
	<script src="/assets/application.js" type="text/javascript"></script>
	<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.13/jquery-ui.js" type="text/javascript"></script>
	<meta content="authenticity_token" name="csrf-param" />
	<meta content="wZv2EN60HHcPOGXmR2FvgsfE4Dditk52fSKPlmJk0KQ=" name="csrf-token" />

	<form accept-charset="UTF-8" action="/users/2/weapons" class="new_weapon" id="new_weapon" method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="✓" /><input name="authenticity_token" type="hidden" value="wZv2EN60HHcPOGXmR2FvgsfE4Dditk52fSKPlmJk0KQ=" /></div>

	<div class="field">
	<label for="weapon_name">Name</label><br />
	<input id="weapon_name" name="weapon[name]" size="30" type="text" />
	</div>
	<div class="field">
	<label for="weapon_condition">Condition</label><br />
	<input id="weapon_condition" name="weapon[condition]" size="30" type="text" />
	</div>

	class Tweet < ActiveRecord::Base
	has_many :categorizations
	has_many :categories, through: :categorizations
	end

	class Categorization < ActiveRecord::Base
	belongs_to :tweet
	belongs_to :category
	end