Ruby + Cuba + Ohm

Cómo armar tu primer web app con Ruby sin rails,
sin saber Ruby ni rails. Usando Cuba y Ohm con Redis.

@KevinJHanna

Ruby > ["foo", "bar"] => ["foo", "bar"] > hash =
{foo: "bar"} => {:foo=>"bar"} > hash[:foo] => "bar"

> name = "kevin" => "kevin" > "mi nombre es
#{name}" => "mi nombre es kevin"

Ruby On Rails framework: Cuba

gems $ gem install cuba Cuba

# cat app.rb require "cuba" Cuba.define do on root do
res.write "Hola, barcamp!" end end

# cat config.ru require "app" run Cuba

$ shotgun -p 8080 $ gem install shotgun

# cat app.rb require "cuba" Cuba.define do on root do
res.write "Hola, barcamp!" end end

# cat app.rb require "cuba" require "cuba/render" Cuba.plugin Cuba::Render Cuba.define
do on root do res.write "Hola, barcamp!" end end

do on root do res.write view("home") end end

do on root do res.write(view("home")) end end

# cat views/layout.erb <!DOCTYPE html> <html> <head> </head> <body> </body>
</html>

# cat views/layout.erb <!DOCTYPE html> <html> <head> </head> <body> <%=
content %> </body> </html>

# cat views/home.erb <h1>Charlas del BarCamp</h1>

# cat app.rb Cuba.define do on root do res.write(view("home")) end
end # cat views/home.erb <h1>Charlas del BarCamp</h1>

# cat app.rb Cuba.define do on root do res.write(view("home", place:
"sala")) end end # cat views/home.erb <h1>Charlas del BarCamp</h1>

"sala")) end end # cat views/home.erb <h1>Charlas del BarCamp</h1> <p>En <%= place %></p>

"sala")) end end

req.GET["place"])) end end

# cat app.rb Cuba.define do on "lugares/:place" do |place| res.write(view("home",
place: place)) end end

redis> SET mykey "Hello" OK redis> GET mykey "Hello"

Ohm ॐ class Talk < Ohm::Model attribute :title attribute :description
attribute :author end

talk = Talk.create( title: "Cómo armar un app en Ruby",
description: "Es muy divertida", author:"Kevin J. Hanna" ) talk.id # => 1 talk.title # => "Cómo armar un app en Ruby" talk == Talk[1] # => true

# cat lib/talk.rb class Talk < Ohm::Model attribute :title attribute
:description attribute :author end

require "cuba" require "cuba/render" require "ohm" require_relative "lib/talk" Ohm.connect(host: "localhost",
port: "6379") Cuba.plugin Cuba::Render Cuba.define do ... end

Cuba.define do end

Cuba.define do on "charlas/crear" do on get do res.write(view("create")) end
end end <h1>Subí tu charla de barcamp</h1> <form method=post action="/charlas/crear"> <input type=text name=title> <input type=text name=author> <textarea name=description></textarea> <button type=submit>Crear</button> </form>

end end

on post do talk = Talk.create( title: req.POST["title"], author: req.POST["author"], description: req.POST["description"], ) res.redirect("/charlas/#{talk.id}", 302) end end end

on post do talk = Talk.create( title: req.POST["title"], author: req.POST["author"], description: req.POST["description"], ) res.redirect("/charlas/#{talk.id}", 302) end end on get, "charlas/:id" do |id| talk = Talk[id] res.write(view("talk", talk: talk)) end end

Cuba.define do ... on root do res.write(view("home") end end

Cuba.define do ... on root do res.write(view("home", talks: Talk.all)) end
end <% talks.each do |talk| %> <p><%= talk.title %></p> <% end %>

:description attribute :author end

:description attribute :author collection :comments, :Comment end

# cat lib/comment.rb class Comment < Ohm::Model attribute :body attribute
:rating reference :talk, :Talk end

Comment.create( talk_id: 1, body: "bueno", rating: 3 ) Comment[1].talk.title #
=> "Cómo armar un app en Ruby" Talk[1].comments # => [Comment[1]] * Comment[1].body # => "bueno"

<header> <h1><%= talk.title %></h1> </header> <p>Autor: <%= talk.author %></p> <p><%=
talk.description %></p> <h2>Escribir comentario</h2> <form method=post action="<%= "/charlas/#{talk.id}" %>"> <textarea name=body></textarea> <input type=text name=rating></input> <button type=submit>Comentar</button> </form>

on get, "charlas/:id" do |id| talk = Talk[id] res.write(view("talk", talk:
talk)) end

on "charlas/:id" do |id| on get do res.write(view("talk", talk: Talk[id]))
end end

on "charlas/:id" do |id| on get do res.write(view("talk", talk: Talk[id]))
end on post do Comment.create( rating: req.POST["rating"], body: req.POST["body"], talk_id: id, ) res.redirect("/charlas/#{id}", 302) end end

talk.description %></p> <h2>Escribir comentario</h2> <form method=post action="<%= "/charlas/#{talk.id}" %>"> <textarea name=body></textarea> <input type=text name=rating></input> <button type=submit>Comentar</button> </form>

talk.description %></p> <h2>Escribir comentario</h2> <form method=post action="<%= "/charlas/#{talk.id}" %>"> <textarea name=body></textarea> <input type=text name=rating></input> <button type=submit>Comentar</button> </form> <% talk.comments.each do |comment| %> <p><%= comment.rating %></p> <% end %>

no vimos validaciones pero es super facil leyendo el readme
de ohm

gracias!

@KevinJHanna Talk[1].preguntas? http://tryruby.org https://github.com/soveran/cuba https://github.com/soveran/ohm http://redis.io/ http://ruby-doc.org/

Ruby + Cuba + Ohm

Ruby + Cuba + Ohm

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