Web applications with Ruby, not Rails

David Padilla @dabit

www.magmaconf.com

Web applications with Ruby (not Rails)

I invented MVC on ASP Classic

Not really

<% set conn=Server.CreateObject("ADODB.Connection") conn.Open "northwind" %> <html> <head> <title>Super App</title>
<link href="style.css" /> </head> <body> <h1>Page 1</h1> <% ' Some code here that connects to the DB and ' displays stuff %> </body> </html> page1.asp

<% set conn=Server.CreateObject("ADODB.Connection") conn.Open "northwind" %> <html> <head> <title>Super App</title>
<link href="style.css" /> </head> <body> <h1>Another Page</h1> <% ' Some code here that connects to the DB and ' displays stuff %> </body> </html> AnotherPage.asp

Index.asp  <html> <head> <title>Super App</title> <link href="style.css" />
</head> <body> <% page = Request.QueryString("page") Select Case page Case "page1" %> <% Case "AnotherPage" %> <% End Select %> </body> </html>

http://therantygirl.ﬁles.wordpress.com/2012/07/happy-cat.jpg

Mid Programmer Life Crisis

Programming Web applications with Rails is BORING

Building websites with Rails is not ENOUGH programming

Most of us don’t know what’s going on outside of
Rails

We used to have all these problems

We used to actually write SQL

Bring programming back

Web applications with Ruby (not Rails)

Rack is cool as Bow Ties

Web Server Web Application A hash with request headers

Web Server Web Application A hash with request headers respond_to(:call)

Web Server Web Application A hash with request headers

[http_code, headers, body]! Integer Hash Responds to :each

Web Server Web Application [http_code, headers, body]!

run -> (env) { puts env [200, {}, []] }
conﬁg.ru

Live Code

Router

/posts PostController #index

Models

ActiveRecord::Base

require 'active_record' ! class User < ActiveRecord::Base #... end model/user.rb

Sequel

model/user.rb require 'sequel' ! DB = Sequel.sqlite ! class User
! def self.all DB[:users].to_a end ! end

pg ! mysql

model/user.rb require 'pg' ! DB = PG.connect( dbname: 'test', host:
'localhost') ! class User def self.all result = DB.exec "SELECT * FROM users" fields = result.fields result.collect do |row| hash = {} row.each_with_index do |value, i| hash[fields[i]] = value end end end end

One last piece of advice

Don’t actually do this

Logging Caching Database Pooling Sessions Cookies Security

Read code

Try to understand how things work

Write your own framework!

<3 Rails Core Team

Disclaimer: I do NOT actually think that writing web applications
with Rails is BORING

github.com/dabit/wawr

@dabit [email protected] Thank You!

Web applications with Ruby, not Rails

Web applications with Ruby, not Rails

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