DZone Snippets: rails code

Deploying on a passenger / mod_rails host with capistrano

jerome () — Tue, 06 May 2008 05:25:13 GMT

// add this to deploy.rb



namespace :mod_rails do

  desc <<-DESC

  Restart the application altering tmp/restart.txt for mod_rails.

  DESC

  task :restart, :roles => :app do

    run "touch  #{release_path}/tmp/restart.txt"

  end

end



namespace :deploy do

  %w(start restart).each { |name| task name, :roles => :app do mod_rails.restart end }

end

Initial caps with ruby on rails

jerome () — Thu, 10 Jan 2008 12:41:22 GMT



class String

  # unicode_str.initial_caps => new_str

  # returns a copy of a string with initial capitals

  # "Jules-Édouard".initial_caps => "J.É."

  def initial_caps

    self.tr('-', ' ').split(' ').map { |word| word.chars.first.upcase.to_s + "." }.join

  end

end

Make your model play nice with SEO

jerome () — Wed, 09 Jan 2008 15:13:08 GMT



## config/initializers/string_extensions.rb



require 'unicode'



class String

  def to_slug

    str = Unicode.normalize_KD(self).gsub(/[^\x00-\x7F]/n,'')

    str = str.gsub(/\W+/, '-').gsub(/^-+/,'').gsub(/-+$/,'').downcase

  end



  def numeric?

    if self =~ /^\d+$/

      self.to_i

    elsif self =~ /^\d+([,\.]\d+)?$/

      self.tr(',','.').to_f

    else

      false

    end

  end

end





## app/models/article.rb



# string :title

# text   :body

# string :permalink

class Article < ActiveRecord::Base

  before_save :set_permalink



  # article_path(@article)

  # >> /article/5

  # article_path(@article.permalink)

  # /article/pink-ferret

  def self.find(*args)

    if args.first.is_a?(String) and !args.first.numeric?

      find_by_permalink(args.shift,*args) or raise ActiveRecord::RecordNotFound

    else

      super

    end

  end



  # article_path(@article)

  # >> /article/5-pink-ferret

  def to_param

    "#{id}-#{permalink}"

  end



  private

  def set_permalink

    self.permalink = title.to_slug

  end

end

A SEO-compliant slug for your titles

jerome () — Sat, 05 Jan 2008 10:03:43 GMT



# This instance method can handle any latin string



require 'unicode'



class String

  def to_slug

    str = Unicode.normalize_KD(self).gsub(/[^\x00-\x7F]/n,'')

    str = str.gsub(/\W+/, '-').gsub(/^-+/,'').gsub(/-+$/,'').downcase

  end

end