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<!doctype html>
<html lang='en'>
<head>
<meta charset='utf-8'>
<title>How to start a project?</title>
<meta content='How to start a project' name='description'>
<meta content='Bogdan Gusiev' name='author'>
<meta content='yes' name='apple-mobile-web-app-capable'>
<meta content='black-translucent' name='apple-mobile-web-app-status-bar-style'>
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
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<script>
document.write( '<link rel="stylesheet" href="http://lab.hakim.se/reveal-js/css/print/' + ( window.location.search.match( /print-pdf/gi ) ? 'pdf' : 'paper' ) + '.css" type="text/css" media="print">' );
</script>
<style>
.yellow {
color: yellow !important; }
.green {
color: #17ff2e !important; }
.red {
color: red !important; }
.first-slide {
width: 100% !important;
height: 100% !important;
top: 0 !important;
position: absolute !important;
max-width: 100% !important;
max-height: 100% !important;
background-color: white !important; }
</style>
</head>
<body>
<div class='all-slides'>
<img src='/techtalk_bottom.png' style='position: absolute; bottom: 0; left:0'>
<img src='/techtalk_corner.png' style='position: absolute; top: 0; left:0'>
</div>
<img class='first-slide' src='/techtalk_main.png' style='z-index: 10000'>
<div class='reveal'>
<div class='slides'>
<section></section>
<section>
<h2>How to build a project</h2>
<h2>architecture in 3 days</h2>
<h3>Bogdan Gusiev</h3>
</section>
<section>
<h3>Bogdan Gusiev:</h3>
<ul>
<li>Working for startups for 7 years</li>
<li>Ruby on Rails for 7 years</li>
</ul>
</section>
<section>
<h2>Start a project</h2>
<ul>
<li>from scratch</li>
<li>from someone's code</li>
</ul>
</section>
<section>
<h2>From Scratch</h2>
<img src='http://vignette1.wikia.nocookie.net/powerlisting/images/2/28/God-creation.jpg/revision/latest?cb=20120927140355' style='width: 400px'>
</section>
<section>
<h2>
What should I do
</h2>
<h2>
in first 3 days
</h2>
<h2>
of a project?
</h2>
</section>
<section>
<img class='fragment' src='http://img13.deviantart.net/a39e/i/2010/351/e/c/flame_war_warning_sign_by_party9999999-d352f5e.png' style='width: 400px'>
<br>
<ul>
<li>ERB vs HAML</li>
<li>Sidekiq vs Resque</li>
<li>Rspec vs TestUnit</li>
<li><your-variant></li>
</ul>
</section>
<section data-markdown=''>
<script type='text/template'>
### Most of things getting discussed
### early has no relation to project
### that is about to be built
</script>
</section>
<section>
<h3>What people do in first 3 days of a project:</h3>
<ul>
<li>An ultimate 2 years roadmap</li>
<li>
Technology
<ul>
<li>Language</li>
<li>Framework</li>
<li>Database</li>
</ul>
</li>
<li>Forecast scaling</li>
<li>An ultimate money spend roadmap</li>
</ul>
</section>
<section>
<h3>Example:</h3>
<h1>Talkable</h1>
<h3 class='fragment'>"Driving Ecommerce Growth With Customer Referrals"</h3>
</section>
<section>
<h3>Expectation:</h3>
<code>wc -l app/models/referral.rb # => 1000+</code>
<br>
<br>
<div class='fragment'>
<h3>
Reality:
<br>
</h3>
<code>Event.where(:action => "referral")</code>
</div>
<br>
<br>
</section>
<section>
<h3>How?</h3>
<div class='fragment'>
<img src='https://monosnap.com/file/bN4jtIHqsKOfhEO3LBegM0VHUIeVKg.png'>
</div>
</section>
<section>
<h1>What did we get?</h1>
<h2 class='fragment'>2 years of corrupt production data</h2>
<h2 class='fragment'>3 month to fix an issue</h2>
</section>
<section>
<h2>3 days — short period</h2>
<h2>No time for holywars</h2>
</section>
<section>
<h2>What differs this project from the rest?</h2>
<h2 class='fragment'>What will be hard to change down the road?</h2>
</section>
<section>
<h3>First thing</h3>
<h2 class='yellow'>Understand the Technology</h2>
</section>
<section data-markdown=''>
<script type='text/template'>
## Information technology
<br/>
``` sh
curl "https://wikipedia/Information_technology&printable=yes" | wc -l
# => 1446
```
# ;TLDR
</script>
</section>
<section>
<h1>Why?</h1>
<div class='fragment'>
<h2>
Because it helps to
</h2>
<h2>
<span class="fragment highlight-green">share information</span>
</h2>
<h2>
<span class="fragment highlight-red"> between people </span>
</h2>
</div>
</section>
<section>
<h3 class='green'>Processing Information</h3>
<h2 class='red'>isn't enough!</h2>
</section>
<section>
<h3>Generic Application Data Model</h3>
<h2>
<nobr>Person -> Model <- Person</nobr>
</h2>
</section>
<section>
<h2>Ecommerce:</h2>
<h2>
<nobr>Customer -> Purchase <- Vendor</nobr>
</h2>
<h3 class='fragment'>
<nobr>Customer -> Order -> Order Item <- Product</nobr>
Order == Cart
</h3>
</section>
<section data-markdown=''>
<script type='text/template'>
## Add some hierarchy
</script>
</section>
<section data-markdown=''>
<script type='text/template'>
## Be specific
</script>
</section>
<section>
<h2>What is the relation?</h2>
<h1 class='fragment'>has_many</h1>
</section>
<section>
<h2>"Has Many" and "Belongs To"</h2>
<h2>are great ways to describe the business logic</h2>
</section>
<section>
<h2>This fact made Relation Databases</h2>
<h2>a standard in the industry</h2>
</section>
<section data-markdown=''>
<script type='text/template'>
## Social Network
<h2 class='fragment'>
<nobr>Author -> Activity <- Subscriber</nobr>
</h2>
<p class="fragment">
<img src="https://api.monosnap.com/image/download?id=rNJSrZUqwyYWkayD0FUjC7Bg5" />
</p>
</script>
</section>
<section>
<h2>How does it look like in code?</h2>
<pre><code class='ruby'># The Basics
User.includes Subscriber
User.includes Author
</code></pre>
<pre class='fragment'><code class='ruby'>Subscriber.has_many :subscriptions, :foreign_key => :subscriber_id

Author.has_many :subscribed_entries, :foreign_key => :author_id, 
 :class_name => "Subscription"
Author.has_many :likes, :photos, :activities
</code></pre>
<pre class='fragment'><code class='ruby'>Like.has_one :activity, :as => :target
Photo.has_one :activity, :as => :target
Comment.has_one :activity, :as => :target
</code></pre>
<pre class='fragment'><code class='ruby'># The Core
module Author
 def authored_activities
 ?
 end
end
module Subscriber
 def subscribed_activities
 ?
 end
end</code></pre>
</section>
<section>
<h3>The most complicated part</h3>
<h3 class='fragment'>
implement
<br>
<code class='highlight-red'> Subscriber#subscribed_activities </code>
</h3>
<div class="fragment">
<img src="https://api.monosnap.com/image/download?id=c3qOtt5uMSSGnpHTf3Oa2pScm" />
</div>
</section>
<section>
<h3>Not all of the information technologies</h3>
<h3>smell like Relational database</h3>
<h2 class='fragment'>But the pattern persists</h2>
</section>
<section>
<h3>Email Client</h3>
<h2 class='fragment'>
<nobr>Sender -> Message <- Recipient</nobr>
</h2>
<h2 class='fragment'>
<nobr>App1: Sender -> Message</nobr>
<br>
<nobr>App2: Message <- Recipient</nobr>
</h2>
</section>
<section>
<h2>Search Engine</h2>
<h3>Searcher -> Search Result <- Page Owner</h3>
<h3 class='fragment'>Query -> Result Item <- Page</h3>
<img src='https://api.monosnap.com/image/download?id=ILHCoxrWnAjawYNokuv7rc1Wi'>
</section>
<section>
<h2>Search Engine</h2>
<p>Even if RDBMS is last thing you will think about in this scope</p>
<pre><code>ResultItem.belongs_to :page
ResultItem.belongs_to :query
Page.has_many :result_items
Query.has_many :result_items, :order => ?
</code></pre>
</section>
<section>
<h3>How to maintain a</h3>
<h2>
<span class='yellow'>healthy startup</span>
?
</h2>
</section>
<section>
<h2>Be Focused</h2>
<pre style='margin: 0 auto; width: 600px; font-size: 1.2em; text-align: center'>Role1 → Model ← Role2</pre>
<pre class='fragment' style='margin: 0 auto; width: 600px; font-size: 1.2em; text-align: center'>↑
Role3
</pre>
</section>
<section data-markdown=''>
<script type='text/template'>
## Personal Organizer:
## Model1 <- Person -> Model2
</script>
</section>
<section>
<h3>We should have all the market</h3>
<br>
<h3>Person -> Model1,Model2 <- Person</h3>
<h3 class='fragment'>
Model1 -> Model2
</h3>
</section>
<section>
<h3>One person work space</h3>
<h2>Role1 -> Model1 <- Role2</h2>
<h2 class='fragment'>Role2 -> Model2 <- Role3</h2>
<h3 class='fragment'>Only 3 days</h3>
</section>
<section>
<h2>
A startup MVP should only
<br>
be built for
<div class='yellow'>
2 roles and
one model
</div>
</h2>
</section>
<section>
<h3>"Respond to a Change"</h3>
<h3>is OK, but</h3>
<h2 class='yellow'>Basic model should never change</h2>
</section>
<section>
<h3>Because things are good for</h3>
<h3>things they were originally designed for</h3>
</section>
<section>
<h3>So what should I do in first 3 days?</h3>
<ol class='yellow'>
<li>Identify Roles</li>
<li>Identify the core model</li>
<li>Build intermediate relations</li>
<li>Implement high level relations</li>
</ol>
</section>
<section>
<h3>Talkable's refer a friend technology</h3>
Advocate -> Offer -> <span class='red'>Share</span> -> Visitor -> <span class='red'>Referral</span> <- Purchase <- <span class="red">Friend</span>
<pre class='fragment'><code class='ruby'>class Person
 include Advocate
 include Friend
end

Advocate.has_many :offers
 Offer.has_many :shares
 Share.has_many :visitors
 Visitor.has_many :referrals

Friend.has_many :purchases
 Purchase.has_one :referral

# Core Relations
Advocate#referrals
Friend#referrals</code></pre>
</section>
<section>
<h2>Thank You</h2>
<br>
<ul>
<li>http://github.com/bogdan</li>
<li>http://gusiev.com</li>
</ul>
</section>
</div>
</div>
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