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<!DOCTYPE html>
<!--
Copyright 2010 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Original slides: Marcin Wichary (mwichary@google.com)
Modifications: Ernest Delgado (ernestd@google.com)
Alex Russell (slightlyoff@chromium.org)
landslide modifications: Adam Zapletal (adamzap@gmail.com)
Nicolas Perriault (nperriault@gmail.com)
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<body>
<div id="blank"></div>
<div class="presentation">
<div id="current_presenter_notes">
<div id="presenter_note"></div>
</div>
<div class="slides">
<!-- slide source: presentation/0.md -->
<div class="slide-wrapper">
<div class="slide">
<div class="inner">
<section><p><img alt="markus" src="presentation/markus_logo_big.png" /></p></section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
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<aside class="source">
Source: <a href="presentation/0.md">presentation/0.md</a>
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<!-- slide source: presentation/0.md -->
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<header><h1>MarkUs</h1></header>
<section><p>MarkUs (pronounced "mark us") is an open-source tool which recreates the ease and flexibility of grading assignments with pen on paper, within a web application. It also allows students and instructors to form groups, and collaborate on assignments.</p>
<p>The MarkUs project is written in <code>Ruby</code> using the <code>Ruby on Rails</code> framework. MarkUs is based on various Open Source softwares, such as <code>Subversion</code>, <code>PostgreSQL/MySQL</code>…</p></section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
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Source: <a href="presentation/0.md">presentation/0.md</a>
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2/26
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<!-- slide source: presentation/1.md -->
<div class="slide-wrapper">
<div class="slide">
<div class="inner">
<header><h1>Installation</h1></header>
<section><h2>Prerequisites</h2>
<ul>
<li>GNU/Linux installation (<code>Ubuntu</code>, <code>Debian</code>, <code>Fedora</code>, <code>Mandriva</code>, …)</li>
<li>MySQL/PostgreSQL and headers libraries</li>
<li>Ruby 1.8.7 and Rubygems ( >= 1.3.7) (or Ruby 1.9.3 with latest svn bindings compiled)</li>
<li>Rails 3.0.x branch</li>
<li>git and a Github account</li>
<li>svn and libsvn-ruby (svn Ruby bindings)</li>
</ul></section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
<footer>
<aside class="source">
Source: <a href="presentation/1.md">presentation/1.md</a>
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<aside class="page_number">
3/26
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<!-- slide source: presentation/2_databases/0.md -->
<div class="slide-wrapper">
<div class="slide">
<div class="inner">
<header><h1>Databases (1/4)</h1></header>
<section><h2>MarkUs stores informations in database</h2>
<ul>
<li>PostgreSQL</li>
<li>MySQL</li>
</ul>
<p>Only for development and limitated (non-concurrency access)</p>
<ul>
<li>SQLite</li>
</ul></section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
<footer>
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Source: <a href="presentation/2_databases/0.md">presentation/2_databases/0.md</a>
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4/26
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<!-- slide source: presentation/2_databases/1.md -->
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<header><h1>Databases (2/4)</h1></header>
<section><h2>Configuration</h2>
<p><em>config/database.yml</em></p>
<div class="highlight"><pre><span class="lineno"> 1</span> <span class="l-Scalar-Plain">development</span><span class="p-Indicator">:</span>
<span class="lineno"> 2</span> <span class="l-Scalar-Plain">adapter</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">mysql</span>
<span class="lineno"> 3</span> <span class="l-Scalar-Plain">encoding</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">utf8</span>
<span class="lineno"> 4</span> <span class="l-Scalar-Plain">database</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">markus_development</span>
<span class="lineno"> 5</span> <span class="l-Scalar-Plain">username</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">markus</span>
<span class="lineno"> 6</span> <span class="l-Scalar-Plain">password</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">secret_p@ssw0rd</span>
<span class="lineno"> 7</span>
<span class="lineno"> 8</span> <span class="l-Scalar-Plain">test</span><span class="p-Indicator">:</span>
<span class="lineno"> 9</span> <span class="l-Scalar-Plain">adapter</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">mysql</span>
<span class="lineno">10</span> <span class="l-Scalar-Plain">encoding</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">utf8</span>
<span class="lineno">11</span> <span class="l-Scalar-Plain">database</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">markus_test</span>
<span class="lineno">12</span> <span class="l-Scalar-Plain">username</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">markus</span>
<span class="lineno">13</span> <span class="l-Scalar-Plain">password</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">secret_p@ssw0rd</span>
<span class="lineno">14</span>
<span class="lineno">15</span> <span class="l-Scalar-Plain">production</span><span class="p-Indicator">:</span>
<span class="lineno">16</span> <span class="l-Scalar-Plain">adapter</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">mysql</span>
<span class="lineno">17</span> <span class="l-Scalar-Plain">encoding</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">utf8</span>
<span class="lineno">18</span> <span class="l-Scalar-Plain">database</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">markus_production</span>
<span class="lineno">19</span> <span class="l-Scalar-Plain">username</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">markus</span>
<span class="lineno">20</span> <span class="l-Scalar-Plain">password</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">secret_p@ssw0rd</span>
</pre></div>
</section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
<footer>
<aside class="source">
Source: <a href="presentation/2_databases/1.md">presentation/2_databases/1.md</a>
</aside>
<aside class="page_number">
5/26
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</div>
<!-- slide source: presentation/2_databases/2.md -->
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<div class="slide">
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<header><h1>Databases (3/4)</h1></header>
<section><h2>Interact with database</h2>
<p>Create the database with <code>bundle exec rake db:create</code>, the load the schema with <code>bundle exec rake db:schema:load</code>.</p>
<p>You can also populate the database with faked datas (very usable for development) : <code>bundle exec rake db:seed</code></p>
<p>By default, Rails will focus on development environment : it is the development database that will be created. To work with other modes; consider using the RAILS_ENV=production or RAILS_ENV=test variable before each bundle statement.</p></section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
<footer>
<aside class="source">
Source: <a href="presentation/2_databases/2.md">presentation/2_databases/2.md</a>
</aside>
<aside class="page_number">
6/26
</aside>
</footer>
</div>
</div>
<!-- slide source: presentation/2_databases/3.md -->
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<div class="slide has_code">
<div class="inner">
<header><h1>Databases (4/4)</h1></header>
<section><h2>Schema</h2>
<p>Rails keep a schema of the database in a file called <em>schema.rb</em>.</p>
<p><em>db/schema.rb:</em></p>
<div class="highlight"><pre><span class="lineno"> 1</span> <span class="c1"># This file is auto-generated from the current state of the database. Instead</span>
<span class="lineno"> 2</span> <span class="c1"># of editing this file, please use the migrations feature of Active Record to</span>
<span class="lineno"> 3</span> <span class="c1"># incrementally modify your database, and then regenerate this schema definition.</span>
<span class="lineno"> 4</span> <span class="c1"># It's strongly recommended to check this file into your version control system.</span>
<span class="lineno"> 5</span>
<span class="lineno"> 6</span> <span class="no">ActiveRecord</span><span class="o">::</span><span class="no">Schema</span><span class="o">.</span><span class="n">define</span><span class="p">(</span><span class="ss">:version</span> <span class="o">=></span> <span class="mi">20110313200240</span><span class="p">)</span> <span class="k">do</span>
<span class="lineno"> 7</span>
<span class="lineno"> 8</span> <span class="n">create_table</span> <span class="s2">"annotation_categories"</span><span class="p">,</span> <span class="ss">:force</span> <span class="o">=></span> <span class="kp">true</span> <span class="k">do</span> <span class="o">|</span><span class="n">t</span><span class="o">|</span>
<span class="lineno"> 9</span> <span class="n">t</span><span class="o">.</span><span class="n">text</span> <span class="s2">"annotation_category_name"</span>
<span class="lineno">10</span> <span class="n">t</span><span class="o">.</span><span class="n">datetime</span> <span class="s2">"created_at"</span>
<span class="lineno">11</span> <span class="n">t</span><span class="o">.</span><span class="n">datetime</span> <span class="s2">"updated_at"</span>
<span class="lineno">12</span> <span class="n">t</span><span class="o">.</span><span class="n">integer</span> <span class="s2">"assignment_id"</span><span class="p">,</span> <span class="ss">:null</span> <span class="o">=></span> <span class="kp">false</span>
<span class="lineno">13</span> <span class="k">end</span>
<span class="lineno">14</span>
<span class="lineno">15</span> <span class="n">add_index</span> <span class="s2">"annotation_categories"</span><span class="p">,</span> <span class="o">[</span><span class="s2">"assignment_id"</span><span class="o">]</span><span class="p">,</span>
<span class="lineno">16</span> <span class="ss">:name</span> <span class="o">=></span> <span class="s2">"index_annotation_categories_on_assignment_id"</span>
</pre></div>
</section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
<footer>
<aside class="source">
Source: <a href="presentation/2_databases/3.md">presentation/2_databases/3.md</a>
</aside>
<aside class="page_number">
7/26
</aside>
</footer>
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<header><h1>Pro tips</h1></header>
<section><h2>Find code</h2>
<p><code>find app/ -name "*" -exec grep -Hn --color "def index" {} \;</code></p>
<p>or simply use
<code>git grep "def index"</code></p></section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
<footer>
<aside class="source">
Source: <a href="presentation/3.md">presentation/3.md</a>
</aside>
<aside class="page_number">
8/26
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</div>
</div>
<!-- slide source: presentation/3_migration/0.md -->
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<header><h1>Migrations (1/3)</h1></header>
<section><h2>Load schema in database</h2>
<p><code>Ruby on Rails</code> will load the schema in the database (the backend doesn't matter) with <code>bundle exec rake db:schema:load</code>.</p>
<h2>Populate the database with fake datas</h2>
<p>You can also populate the database with students, graders, admin, assignments with <code>bundle exec rake db:populate</code>. Take a look at <em>db/populate/*.rb</em> files.</p></section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
<section>
</section>
</div>
<footer>
<aside class="source">
Source: <a href="presentation/3_migration/0.md">presentation/3_migration/0.md</a>
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<aside class="page_number">
9/26
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</div>
</div>
<!-- slide source: presentation/3_migration/1.md -->
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<div class="inner">
<header><h1>Migrations (2/3)</h1></header>
<section><h2>Agile development with migrations</h2>
<p>Migrations and iterations are the agile way to construct databases.</p>
<p><em>db/migrate/20100812195558_create_test_file.rb:</em></p>
<div class="highlight"><pre><span class="lineno"> 1</span> <span class="k">class</span> <span class="nc">CreateTestFile</span> <span class="o"><</span> <span class="no">ActiveRecord</span><span class="o">::</span><span class="no">Migration</span>
<span class="lineno"> 2</span> <span class="kp">extend</span> <span class="no">MigrationHelpers</span>
<span class="lineno"> 3</span>
<span class="lineno"> 4</span> <span class="k">def</span> <span class="nc">self</span><span class="o">.</span><span class="nf">up</span>
<span class="lineno"> 5</span> <span class="n">create_table</span> <span class="ss">:test_files</span> <span class="k">do</span> <span class="o">|</span><span class="n">t</span><span class="o">|</span>
<span class="lineno"> 6</span> <span class="n">t</span><span class="o">.</span><span class="n">column</span> <span class="ss">:filename</span><span class="p">,</span> <span class="ss">:string</span>
<span class="lineno"> 7</span> <span class="n">t</span><span class="o">.</span><span class="n">column</span> <span class="ss">:assignment_id</span><span class="p">,</span> <span class="ss">:int</span>
<span class="lineno"> 8</span> <span class="n">t</span><span class="o">.</span><span class="n">column</span> <span class="ss">:filetype</span><span class="p">,</span> <span class="ss">:string</span>
<span class="lineno"> 9</span> <span class="n">t</span><span class="o">.</span><span class="n">column</span> <span class="ss">:is_private</span><span class="p">,</span> <span class="ss">:boolean</span>
<span class="lineno">10</span> <span class="n">t</span><span class="o">.</span><span class="n">column</span> <span class="ss">:created_at</span><span class="p">,</span> <span class="ss">:timestamp</span>
<span class="lineno">11</span> <span class="n">t</span><span class="o">.</span><span class="n">column</span> <span class="ss">:updated_at</span><span class="p">,</span> <span class="ss">:timestamp</span>
<span class="lineno">12</span> <span class="k">end</span>
<span class="lineno">13</span> <span class="n">add_index</span> <span class="ss">:test_files</span><span class="p">,</span> <span class="o">[</span><span class="ss">:assignment_id</span><span class="p">,</span> <span class="ss">:filename</span><span class="o">]</span><span class="p">,</span>
<span class="lineno">14</span> <span class="ss">:name</span> <span class="o">=></span> <span class="s2">"index_test_files_on_assignment_id_and_filename"</span><span class="p">,</span>
<span class="lineno">15</span> <span class="ss">:unique</span> <span class="o">=></span> <span class="kp">true</span>
<span class="lineno">16</span> <span class="k">end</span>
<span class="lineno">17</span>
<span class="lineno">18</span> <span class="k">def</span> <span class="nc">self</span><span class="o">.</span><span class="nf">down</span>
<span class="lineno">19</span> <span class="n">drop_table</span> <span class="ss">:test_files</span> <span class="k">if</span> <span class="n">table_exists?</span><span class="p">(</span><span class="ss">:test_files</span><span class="p">)</span>
<span class="lineno">20</span> <span class="k">end</span>
<span class="lineno">21</span> <span class="k">end</span>
</pre></div>
</section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
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<header><h1>Migrations (3/3)</h1></header>
<section><h2>Agile development with migrations</h2>
<p>Run or rollback migrations with <code>bundle exec rake db:migrate</code> and <code>bundle exec rake db:rollback</code>.</p>
<p>It creates a <code>Ruby</code> schema file, used by the <code>Ruby on Rails</code> Model` to interact with objects.</p>
<p><em>db/schema.rb:</em></p>
<div class="highlight"><pre><span class="lineno"> 1</span> <span class="c1"># This file is auto-generated from the current state of the database. Instead</span>
<span class="lineno"> 2</span> <span class="c1"># of editing this file, please use the migrations feature of Active Record to</span>
<span class="lineno"> 3</span> <span class="c1"># incrementally modify your database, and then regenerate this schema definition.</span>
<span class="lineno"> 4</span> <span class="c1"># It's strongly recommended to check this file into your version control system.</span>
<span class="lineno"> 5</span>
<span class="lineno"> 6</span> <span class="no">ActiveRecord</span><span class="o">::</span><span class="no">Schema</span><span class="o">.</span><span class="n">define</span><span class="p">(</span><span class="ss">:version</span> <span class="o">=></span> <span class="mi">20110313200240</span><span class="p">)</span> <span class="k">do</span>
<span class="lineno"> 7</span>
<span class="lineno"> 8</span> <span class="n">create_table</span> <span class="s2">"annotation_categories"</span><span class="p">,</span> <span class="ss">:force</span> <span class="o">=></span> <span class="kp">true</span> <span class="k">do</span> <span class="o">|</span><span class="n">t</span><span class="o">|</span>
<span class="lineno"> 9</span> <span class="n">t</span><span class="o">.</span><span class="n">text</span> <span class="s2">"annotation_category_name"</span>
<span class="lineno">10</span> <span class="n">t</span><span class="o">.</span><span class="n">datetime</span> <span class="s2">"created_at"</span>
<span class="lineno">11</span> <span class="n">t</span><span class="o">.</span><span class="n">datetime</span> <span class="s2">"updated_at"</span>
<span class="lineno">12</span> <span class="n">t</span><span class="o">.</span><span class="n">integer</span> <span class="s2">"assignment_id"</span><span class="p">,</span> <span class="ss">:null</span> <span class="o">=></span> <span class="kp">false</span>
<span class="lineno">13</span> <span class="k">end</span>
<span class="lineno">14</span>
<span class="lineno">15</span> <span class="n">add_index</span> <span class="s2">"annotation_categories"</span><span class="p">,</span> <span class="o">[</span><span class="s2">"assignment_id"</span><span class="o">]</span><span class="p">,</span>
<span class="lineno">16</span> <span class="ss">:name</span> <span class="o">=></span> <span class="s2">"index_annotation_categories_on_assignment_id"</span>
</pre></div>
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<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
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<header><h1>Bundler (1/2)</h1></header>
<section><h2>Gemfile and Gem management</h2>
<p>Librairies are called gem and there is a tool to manage them, called <code>Rubygems</code>.</p>
<p>Put all needed gems in the <em>Gemfile</em> and run <code>bundle install</code> to install them.</p>
<p><em>Gemfile:</em></p>
<div class="highlight"><pre><span class="lineno">1</span> <span class="c1"># Make sure to decleare at least one 'source'</span>
<span class="lineno">2</span> <span class="n">source</span> <span class="s1">'http://rubygems.org'</span>
<span class="lineno">3</span>
<span class="lineno">4</span> <span class="c1"># Bundler requires these gems in all environments</span>
<span class="lineno">5</span> <span class="n">gem</span> <span class="s2">"rails"</span>
<span class="lineno">6</span> <span class="n">gem</span> <span class="s1">'exception_notification'</span>
<span class="lineno">7</span> <span class="c1">#gem "prototype-rails" Will be needed with Rails3.1</span>
<span class="lineno">8</span> <span class="n">gem</span> <span class="s2">"db_populate"</span>
<span class="lineno">9</span> <span class="n">gem</span> <span class="s2">"rubyzip"</span>
</pre></div>
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<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
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<header><h1>Bundler (2/2)</h1></header>
<section><h2>Gemfile and Gem management</h2>
<p>Gems dependencies and configurations are stored in Gemfile.lock, generated with the <code>bundle install</code> command</p>
<p><em>Gemfile.lock:</em></p>
<div class="highlight"><pre><span class="lineno"> 1</span> <span class="no">GEM</span>
<span class="lineno"> 2</span> <span class="n">remote</span><span class="p">:</span> <span class="n">http</span><span class="ss">:/</span><span class="o">/</span><span class="n">rubygems</span><span class="o">.</span><span class="n">org</span><span class="o">/</span>
<span class="lineno"> 3</span> <span class="n">specs</span><span class="p">:</span>
<span class="lineno"> 4</span> <span class="n">rack</span><span class="o">-</span><span class="n">mount</span> <span class="p">(</span><span class="mi">0</span><span class="o">.</span><span class="mi">6</span><span class="o">.</span><span class="mi">14</span><span class="p">)</span>
<span class="lineno"> 5</span> <span class="n">rack</span> <span class="p">(</span><span class="o">>=</span> <span class="mi">1</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">0</span><span class="p">)</span>
<span class="lineno"> 6</span> <span class="n">rack</span><span class="o">-</span><span class="nb">test</span> <span class="p">(</span><span class="mi">0</span><span class="o">.</span><span class="mi">5</span><span class="o">.</span><span class="mi">7</span><span class="p">)</span>
<span class="lineno"> 7</span> <span class="n">rack</span> <span class="p">(</span><span class="o">>=</span> <span class="mi">1</span><span class="o">.</span><span class="mi">0</span><span class="p">)</span>
<span class="lineno"> 8</span> <span class="n">railroady</span> <span class="p">(</span><span class="mi">1</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">2</span><span class="p">)</span>
<span class="lineno"> 9</span> <span class="n">rails</span> <span class="p">(</span><span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">10</span><span class="p">)</span>
<span class="lineno">10</span> <span class="n">actionmailer</span> <span class="p">(</span><span class="o">=</span> <span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">10</span><span class="p">)</span>
<span class="lineno">11</span> <span class="n">actionpack</span> <span class="p">(</span><span class="o">=</span> <span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">10</span><span class="p">)</span>
<span class="lineno">12</span> <span class="n">activerecord</span> <span class="p">(</span><span class="o">=</span> <span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">10</span><span class="p">)</span>
<span class="lineno">13</span> <span class="n">activeresource</span> <span class="p">(</span><span class="o">=</span> <span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">10</span><span class="p">)</span>
<span class="lineno">14</span> <span class="n">activesupport</span> <span class="p">(</span><span class="o">=</span> <span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">10</span><span class="p">)</span>
<span class="lineno">15</span> <span class="n">bundler</span> <span class="p">(</span><span class="o">~></span> <span class="mi">1</span><span class="o">.</span><span class="mi">0</span><span class="p">)</span>
<span class="lineno">16</span> <span class="n">railties</span> <span class="p">(</span><span class="o">=</span> <span class="mi">3</span><span class="o">.</span><span class="mi">0</span><span class="o">.</span><span class="mi">10</span><span class="p">)</span>
</pre></div>
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<header><h1>Presenter Notes</h1></header>
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<header><h1>Git (1/5)</h1></header>
<section><h2>SCM used for MarkUs source code</h2>
<p><code>Git</code> is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.</p>
<p><img alt="git-workflow" height="420" width="400" src="presentation/5_git/git-workflow.png" title="Git Workflow" /></p></section>
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<header><h1>Presenter Notes</h1></header>
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<header><h1>Git (2/5)</h1></header>
<section><h2>Example of workflow</h2>
<p><img alt="git" src="presentation/5_git/git-workflow2.png" /></p></section>
</div>
<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
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<header><h1>Git (3/5)</h1></header>
<section><h2>Basics</h2>
<p>$ <code>git init</code></p>
<p>$ <code>git add .</code></p>
<p>$ <code>git commit -m "My first backup"</code></p>
<h2>Roll back</h2>
<p>$ <code>git reset --hard</code></p>
<h2>Save the state</h2>
<p>$ <code>git commit -a -m "Another backup"</code></p>
<p>$ <code>git add readme.txt Documentation</code></p></section>
</div>
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<header><h1>Presenter Notes</h1></header>
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<header><h1>Git (4/5)</h1></header>
<section><h2>Remove</h2>
<p>Similarly, if you want Git to forget about certain files:</p>
<p>$ <code>git rm kludge.h obsolete.c</code></p>
<p>$ <code>git rm -r incriminating/evidence/</code></p>
<h2>Rename</h2>
<p>$ <code>git mv bug.c feature.c</code></p>
<h2>Log</h2>
<p>$ <code>git log</code></p>
<p>$ <code>git reset --hard 766f</code></p></section>
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<header><h1>Presenter Notes</h1></header>
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<header><h1>Git (5/5)</h1></header>
<section><h2>Change state</h2>
<p>$ <code>git checkout 82f5</code></p>
<p>$ <code>git checkout master</code></p>
<h2>Commit everything</h2>
<p>$ <code>git commit -a</code></p>
<h2>Clone a repository</h2>
<p>$ <code>git clone git://server/path/to/files</code></p>
<h2>What changed?</h2>
<p>$ <code>git diff</code></p>
<p>$ <code>git diff 1b6d "master~2"</code></p>
<p>$ <code>git whatchanged --since="2 weeks ago"</code></p></section>
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<header><h1>Presenter Notes</h1></header>
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</section>
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<header><h1>Debugger (1/2)</h1></header>
<section><h2>Breakpoint</h2>
<p>Just put the word <code>debugger</code> in a portion of code called by RoR</p>
<p><em>app/controllers/sections_controller.rb:</em></p>
<div class="highlight"><pre><span class="lineno">1</span> <span class="k">def</span> <span class="nf">index</span>
<span class="lineno">2</span> <span class="vi">@sections</span> <span class="o">=</span> <span class="no">Section</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="ss">:all</span><span class="p">)</span>
<span class="lineno">3</span> <span class="k">end</span>
</pre></div>
<p><em>became:</em></p>
<div class="highlight"><pre><span class="lineno">1</span> <span class="k">def</span> <span class="nf">index</span>
<span class="lineno">2</span> <span class="n">debugger</span>
<span class="lineno">3</span> <span class="vi">@sections</span> <span class="o">=</span> <span class="no">Section</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="ss">:all</span><span class="p">)</span>
<span class="lineno">4</span> <span class="k">end</span>
</pre></div>
<p><em>In your terminal:</em></p>
<div class="highlight"><pre><span class="lineno">1</span> Completed 200 OK in 853ms <span class="o">(</span>Views: 536.6ms | ActiveRecord: 91.5ms<span class="o">)</span>
<span class="lineno">2</span> /mnt/data/MarkUs/Markus/app/controllers/sections_controller.rb:11
<span class="lineno">3</span> @sections <span class="o">=</span> Section.find<span class="o">(</span>:all<span class="o">)</span>
<span class="lineno">4</span> <span class="o">(</span>rdb:1<span class="o">)</span>
</pre></div>
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<header><h1>Presenter Notes</h1></header>
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<header><h1>Debugger (2/2)</h1></header>
<section><h2>irb</h2>
<p>Then just press <code>irb</code> you will be in an irb (Interactive RuBy) shell.</p>
<p>You can have access to the same variables Ruby has access.</p>
<p><em>In your terminal:</em></p>
<div class="highlight"><pre><span class="lineno"> 1</span> <span class="o">(</span>rdb:1<span class="o">)</span> irb
<span class="lineno"> 2</span> irb<span class="o">(</span><span class="c">#<SectionsController:0x7f8da4c1ab68>):001:0> @section</span>
<span class="lineno"> 3</span> <span class="o">=</span>> nil
<span class="lineno"> 4</span> irb<span class="o">(</span><span class="c">#<SectionsController:0x7f8da4c1ab68>):002:0> Section.new</span>
<span class="lineno"> 5</span> <span class="o">=</span>> <span class="c">#<Section id: nil, name: nil, created_at: nil, updated_at: nil></span>
<span class="lineno"> 6</span> irb<span class="o">(</span><span class="c">#<SectionsController:0x7f8da4c1ab68>):003:0> s = Student.find(:all)</span>
<span class="lineno"> 7</span> <span class="o">=</span>> <span class="o">[</span><span class="c">#<Student id: 3, user_name: "c8mahler", last_name: "Mahler",</span>
<span class="lineno"> 8</span> first_name: <span class="s2">"Gustav"</span>, grace_credits: 0, <span class="nb">type</span>: <span class="s2">"Student"</span>, created_at:
<span class="lineno"> 9</span> <span class="s2">"2011-12-22 14:32:02"</span>, updated_at: <span class="s2">"2011-12-22 14:32:02"</span>, hidden: <span class="nb">false</span>,
<span class="lineno">10</span> api_key: nil, section_id: nil, notes_count: 0>, <span class="c">#<Student id: 4, user_name:</span>
<span class="lineno">11</span> <span class="s2">"c9magnar"</span>, last_name: <span class="s2">"Magnard"</span>, first_name: <span class="s2">"Alberic"</span>, grace_credits: 0,
<span class="lineno">12</span> <span class="nb">type</span>: <span class="s2">"Student"</span>, created_at: <span class="s2">"2011-12-22 14:32:02"</span>, updated_at: <span class="s2">"2011-12-22</span>
<span class="lineno">13</span> <span class="s2">14:32:02"</span>, h…
</pre></div>
</section>
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<header><h1>Presenter Notes</h1></header>
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Source: <a href="presentation/6_debugger/1.md">presentation/6_debugger/1.md</a>
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20/26
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<header><h1>Routes (1/3)</h1></header>
<section><p>URL with access permitted through the application.
Describe the http method used (GET, POST, PUT, DELETE).</p>
<p>All routes are defined in match order, with names in <em>config/routes.rb</em></p>
<p><em>Example:</em></p>
<div class="highlight"><pre><span class="lineno">1</span> http://localhost:3000/en/assignments/2/edit
<span class="lineno">2</span> http://localhost:3000/en/admins/2/edit
<span class="lineno">3</span> http://localhost:3000/fr/tas/new
<span class="lineno">4</span> http://localhost:3000/fr/assignments/download_csv_grades_report
<span class="lineno">5</span> ...
</pre></div>
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<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
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Source: <a href="presentation/7_routes/0.md">presentation/7_routes/0.md</a>
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21/26
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<header><h1>Routes (2/3)</h1></header>
<section><h2>Tell me more</h2>
<div class="highlight"><pre><span class="lineno"> 1</span> bundle <span class="nb">exec </span>rake routes
<span class="lineno"> 2</span>
<span class="lineno"> 3</span> add_note_notes POST /notes/add_note<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno"> 4</span> noteable_object_selector_notes POST /notes/noteable_object_selector<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno"> 5</span> new_update_groupings_notes GET /notes/new_update_groupings<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno"> 6</span> POST /notes/new_update_groupings<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno"> 7</span> student_interface_note GET /notes/:id/student_interface<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno"> 8</span> notes_dialog_note GET /notes/:id/notes_dialog<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno"> 9</span> grades_note POST /notes/:id/grades<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno">10</span> notes GET /notes<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno">11</span> POST /notes<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno">12</span> new_note GET /notes/new<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno">13</span> edit_note GET /notes/:id/edit<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno">14</span> note GET /notes/:id<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno">15</span> PUT /notes/:id<span class="o">(</span>.:format<span class="o">)</span>
<span class="lineno">16</span> DELETE /notes/:id<span class="o">(</span>.:format<span class="o">)</span>
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<header><h1>Presenter Notes</h1></header>
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Source: <a href="presentation/7_routes/1.md">presentation/7_routes/1.md</a>
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22/26
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<header><h1>Routes (3/3)</h1></header>
<section><h2>Understanding routes</h2>
<p><em>config/routes.rb:</em></p>
<div class="highlight"><pre><span class="lineno"> 1</span> <span class="n">resources</span> <span class="ss">:main</span> <span class="k">do</span>
<span class="lineno"> 2</span> <span class="n">collection</span> <span class="k">do</span>
<span class="lineno"> 3</span> <span class="n">get</span> <span class="s1">'logout'</span>
<span class="lineno"> 4</span> <span class="n">get</span> <span class="s1">'about'</span>
<span class="lineno"> 5</span> <span class="n">post</span> <span class="s1">'login_as'</span>
<span class="lineno"> 6</span> <span class="n">get</span> <span class="s1">'role_switch'</span>
<span class="lineno"> 7</span> <span class="n">get</span> <span class="s1">'clear_role_switch_session'</span>
<span class="lineno"> 8</span> <span class="n">post</span> <span class="s1">'reset_api_key'</span>
<span class="lineno"> 9</span> <span class="k">end</span>
<span class="lineno">10</span> <span class="k">end</span>
<span class="lineno">11</span>
<span class="lineno">12</span> <span class="n">match</span> <span class="s1">'main'</span><span class="p">,</span> <span class="ss">:controller</span> <span class="o">=></span> <span class="s1">'main'</span><span class="p">,</span> <span class="ss">:action</span> <span class="o">=></span> <span class="s1">'index'</span>
<span class="lineno">13</span> <span class="n">match</span> <span class="s1">'main/about'</span><span class="p">,</span> <span class="ss">:controller</span> <span class="o">=></span> <span class="s1">'main'</span><span class="p">,</span> <span class="ss">:action</span> <span class="o">=></span> <span class="s1">'about'</span>
<span class="lineno">14</span> <span class="n">match</span> <span class="s1">'main/logout'</span><span class="p">,</span> <span class="ss">:controller</span> <span class="o">=></span> <span class="s1">'main'</span><span class="p">,</span> <span class="ss">:action</span> <span class="o">=></span> <span class="s1">'logout'</span>
<span class="lineno">15</span>
<span class="lineno">16</span> <span class="c1"># Return a 404 when no route is match</span>
<span class="lineno">17</span> <span class="n">match</span> <span class="s1">'*path'</span><span class="p">,</span> <span class="ss">:controller</span> <span class="o">=></span> <span class="s1">'main'</span><span class="p">,</span> <span class="ss">:action</span> <span class="o">=></span> <span class="s1">'page_not_found'</span>
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<div class="presenter_notes">
<header><h1>Presenter Notes</h1></header>
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Source: <a href="presentation/7_routes/2.md">presentation/7_routes/2.md</a>
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23/26
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