This document contains notes from a Rails development session. It includes information about setting up a Rails application with Markdown rendering, using Redcarpet and other gems. Code snippets show implementing authentication, layouts, partials and controllers. Links are provided to documentation and tutorials about Rails forms, layouts, Haml and Sass.

1. View
Hamamatsurb#7 2011.09.14 @mackato
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3. Wiki
54
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8. View
- Ruby on Rails Guides
Layouts and Rendering in Rails
http://edgeguides.rubyonrails.org/layouts_and_rendering.html
Rails Form helpers
http://edgeguides.rubyonrails.org/form_helpers.html
- Haml & Sass
#haml
http://haml-lang.com/
Sass - Syntactically Awesome Stylesheets
http://sass-lang.com/
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9. Version 1.9.2
Version 3.0.9
Version 0.9.2
.rvmrc
rvm ruby-1.9.2-p180@rails-3_0_9
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10. GitHub
git clone git://github.com/hamamatsu-rb/rails3dojo.git
git checkout -b working 3-controller
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12. app/controllers/application_controller.rb
helper_method :current_user
def current_user
@current_user ||= User.find(session[:user_id])
if session[:user_id]
@current_user
rescue ActiveRecord::RecordNotFound => e
nil
end
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13. app/views/layouts/application.html.haml
- if current_user
%span#user_name= current_user.name
|
= link_to "Logout",
session_path(session[:user_id]),
:method => :delete
- else
= form_tag sessions_path, :id => "login_form" do
%label{:for => "user_name"} Name
= text_field_tag :user_name
= hidden_field_tag :before_path, request.path
= submit_tag "Login"
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14. app/views/layouts/application.html.haml
%body
= flash_tag
app/halpers/application_helper.rb
def flash_tag
unless flash.empty?
flash.each do |k, v|
return content_tag(:div, v,
:class => [k, :flash])
end
end
<div class="error flash">Name can't be blank</div>
end
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16. app/views/pages/new.html.haml
- content_for :title, "New Page"
%h1= yield :title
%div
= render(:partial => 'form',
:locals => { :method => :post,
:button => "Create" })
app/views/pages/edit.html.haml
- content_for :title, "Edit Page"
%h1= yield :title
%div
= render(:partial => 'form',
:locals => { :method => :put,
:button => "Update" })
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17. app/views/pages/_form.html.haml
= form_for @page, :method => method do |f|
= f.label :title
= f.text_field :title, :class => "full-width"
= f.label :body
= f.text_area :body, :class => "full-width",
:rows => 20
= f.submit button
- if method == :put and not @page.title.blank?
or
= link_to "Back", wiki_page_path(@page.title)
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19. app/views/pages/show.html.haml
- content_for :title, @page.title
%h1= yield :title
= markdown(@page.body)
%hr{:class => "half-bottom"}
%p
= page_update_info_tag(@page)
- if current_user
%br
= link_to "Edit", edit_page_path(@page)
|
= link_to "Delete",
page_path(@page),
:method => :delete,
:confirm => "Are you sure?"
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20. Ruby library for GitHub Flavored Markdown
```ruby
puts "Hello World!"
````
Rolling out the Redcarpet
https://github.com/blog/832-rolling-out-the-redcarpet
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21. Gemfile
gem "redcarpet"
gem "albino"
gem "nokogiri"
Install Pygments(Python Syntax highlighter)
% pip install pygments
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22. app/helpers/application_helper.rb
def markdown(text)
text.gsub!(/[[(.+)]]/, '[1](/1)')
options = [:hard_wrap, :filter_html, :autolink,
:fenced_code, :gh_blockcode]
syntax_highligher(Redcarpet.new(text, *options).to_html).html_safe
end
def syntax_highligher(html)
doc = Nokogiri::HTML(html)
doc.search("//pre[@lang]").each do |pre|
pre.replace Albino.colorize(pre.text.rstrip, pre[:lang])
end
doc.to_s
end
#272 Markdown with Redcarpet - RailsCasts
http://railscasts.com/episodes/272-markdown-with-redcarpet
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26. app/views/pages/show.html.haml
m(_ _)m
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28. app/views/pages/index.html.haml
- content_for :title, "Pages"
%h1= yield :title
- @pages.each do |page|
%h4= link_to page.title,
wiki_page_path(page.title)
%p= page_update_info_tag(page)
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30. app/views/welcome/index.html.haml
- content_for :title, "Welcome"
%h1= yield :title
%p
Rails3dojo is the ...
%br
It's made in
= link_to "Hamamatsu.rb",
"http://hamamatsu-rb.github.com/"
%p
At first, please create your
= link_to "Home page", wiki_page_path("Home")
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31. git checkout master
git merge working
git branch -d working
git clone git://github.com/hamamatsu-rb/rails3dojo.git
git checkout 4-view
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