-
Notifications
You must be signed in to change notification settings - Fork 13
/
sinatra-routes-presentation.html
188 lines (159 loc) · 6.28 KB
/
sinatra-routes-presentation.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Rails Girls Brisbane - Routes in Sinatra</title>
<meta name="description" content="Rails Girls Brisbane tutorial">
<meta name="author" content="RailsGirls Brisbane">
<meta name="apple-mobile-web-app-capable" content="yes"/>
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent"/>
<meta name="viewport"
content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/beige.css" id="theme">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
<!-- Code syntax highlighting -->
<link rel="stylesheet" href="lib/css/zenburn.css">
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Introduction -->
<div class="slides">
<section data-transition="slide-in">
<h1>Routes</h1>
<p>Connecting URL to your code</p>
<p>
<small>Daphne Rouw </br>
<i class="fa fa-twitter">@daphsta</i>
</small>
</p>
</section>
<section data-transition="slide-in">
<h2>Type in a URL</h2>
<p> <code>http://sinatra.c9.io/ideas</code> </p>
<p> Brings up the file <pre>app/views/ideas/index.erb</pre>
</p>
</section>
<section data-transition="slide-in">
<h2>How does Sinatra know?</h2>
<p>Map <pre>http://localhost:3000/ideas</pre> to <pre>app/views/ideas/index.erb</pre></p>
</section>
<section data-transition="slide-in">
<h2>Routes</h2>
<p>A system called routing in Sinatra, matches HTTP requests from browser to the app</p>
</section>
<section data-transition="slide-in">
<h2>Request from browser </h2>
<p>Requests made from browser (by typing in a URL) would have a HTTP method defined so that the app knows what actions to perform</p>
</section>
<section data-transition="slide-in">
<h2>Routes in Sinatra app</h2>
<p>This request is received by the routing system and refers to
<pre>app/controllers/ideas_controller.rb</pre>file.
The routing system looks for:
</p>
<ul>
<li>a matching HTTP method <pre><code>GET, POST, PUT, PATCH</code></pre></li>
<li>parameters if any eg: <pre><code>/ideas/:id</code></pre></li> params[:id] to access :id
</ul>
</section>
<section data-transition="slide-in">
<h2>Route Block</h2>
<p> Route accepts a block which sets an instance variable and view to render </p>
<pre><code>
get '/ideas' do
@ideas = Idea.all
erb: 'ideas/index'
end
</pre></code>
<ul>
<li> Matches GET /ideas route</li>
<li>Sets <code>@ideas</code> by getting all records from <code>ideas</code> table via <code>Idea</code> ActiveRecord model</li>
<li><code>erb:</code> determines view page to render <code>ideas/index.erb</code></li>
</ul>
</section>
<section data-transition="slide-in">
<h2>Recap</h2>
<ul>
<li>URL entered in browser will be checked if a corresponding entry exists in <code>app/controlleres/ideas_controllers.rb</code></li>
<li>If there is a match in the routes, the request executes the block of code to query from database</li>
<li>It renders the specified view</li>
</ul>
</section>
<section data-transition="slide-in">
<h2>HTTP methods</h2>
<p>There are 4 HTTP methods (main 4 we will be using): </p>
<ul>
<li>GET</li>
<li>PUT</li>
<li>POST</li>
<li>DELETE</li>
</ul>
</section>
<section data-transition="slide-in">
<h2>Matching HTTP method to an action</h2>
<p><pre><code>GET /ideas/new</code></pre> to create a new idea </p>
<p><pre><code>POST /ideas</code></pre> will create a new idea and saves in the database</p>
<p><pre><code>GET /ideas/:id</code></pre> display a specific idea </p>
</section>
<section data-transition="slide-in">
<h2>Recap</h2>
<ul>
<li>In Sinatra, routing is more explicit compared to Rails</li>
<li>HTTP methods are matched <pre><code>GET /idea/:id</code></pre></li>
<li>A block of code containing data stored in an instance variable and view to render is executed</li>
<pre><code>
get '/idea/:id' do
@ideas = Idea.all
erb: 'ideas/index'
end
</pre></code>
</ul>
</section>
</div>
</div>
<script src="lib/js/head.min.js"></script>
<script src="js/reveal.js"></script>
<script>
// Full list of configuration options available at:
// https://github.com/hakimel/reveal.js#configuration
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: true,
transition: 'slide', // none/fade/slide/convex/concave/zoom
// Optional reveal.js plugins
dependencies: [
{
src: 'lib/js/classList.js', condition: function () {
return !document.body.classList;
}
},
{
src: 'plugin/markdown/marked.js', condition: function () {
return !!document.querySelector('[data-markdown]');
}
},
{
src: 'plugin/markdown/markdown.js', condition: function () {
return !!document.querySelector('[data-markdown]');
}
},
{
src: 'plugin/highlight/highlight.js', async: true, condition: function () {
return !!document.querySelector('pre code');
}, callback: function () {
hljs.initHighlightingOnLoad();
}
},
{src: 'plugin/zoom-js/zoom.js', async: true},
{src: 'plugin/notes/notes.js', async: true}
]
});
</script>
</body>
</html>