Map easily URLs in your Web applications. The extension Sinatra::Mapping is a minimal module that is useful for create route map names for Ruby Sinatra web applications.

Getting start

Install stable version gem from RubyForge.org:


      gem install sinatra-mapping
    

Or, install development version gem from GitHub.com:


      gem install hallison-sinatra-mapping --source http://gems.github.com
    

How to use

Sinatra implements REST routes:

get '/' do
  .. show something ..
end

post '/' do
  .. create something ..
end

put '/' do
  .. update something ..
end

delete '/' do
  .. annihilate something ..
end

For improve this routes use extension by registered method in the main source of application. To better understand, copy and paste the following example in Ruby source file webfoo.rb:

#!/usr/bin/env ruby
require 'rubygems'
require 'sinatra'
require 'sinatra/mapping' # only this line for use mapping!

class Sinatra::Application

  map :root,    "blog"    # /blog/
  map :entries, "posts"   # /blog/posts
  map :tags,    "labels"  # /blog/labels

  mapping :entry          => "posts/:entry_id",           # /blog/posts/id-for-post
          :entry_comments => "posts/:entry_id/comments",  # /blog/posts/id-for-post/comments
          :tagged_entries => "labels/:tag_id/entries"     # /blog/labels/id-for-tag/entries

  # /blog/
  get root_path do
    <<-end_content
      <h1>Welcome to Foo Web Application</h1>
      <ul>
        <li>#{link_to title_path(:entries), :entries, :title => title_path(:entries)}</li>
        <li>#{link_to title_path(:tags),    :tags,    :title => title_path(:tags)}</li>
      </ul>
    end_content
  end

  # /blog/entries
  get entries_path do
    <<-end_content
      <h1>Welcome to Foo Web Application</h1>
      <h2>#{title_path(:entries)}</h2>
      <ul>
        <li>#{link_to "Testing new entry ...", :entries, "testing-new-entry"}</li>
        <li>#{link_to "Testing old entry ...", :entries, "testing-old-entry"}</li>
      </ul>
      <p>
        #{link_to "Back", :root}
      </p>
    end_content
  end

  # /blog/labels/tag-id-for-show-content
  get tags_path do
    <<-end_content
      <h1>Welcome to Foo Web Application</h1>
      <h2>#{title_path(:tags)}</h2>
      <ul>
        <li>#{link_to "Ruby",    :tags, "ruby",    "entries"}</li>
        <li>#{link_to "Sinatra", :tags, "sinatra", "entries"}</li>
        <li>#{link_to "Mapping", :tags, "mapping", "entries"}</li>
      </ul>
      <p>
        #{link_to "Back", :root}
      </p>
    end_content
  end

  # /blog/entries/entry-id-for-show-content
  get entry_path do |entry_id|
    title = entry_id.gsub('-',' ').capitalize
    <<-end_content
      <h1>Welcome to Foo Web Application</h1>
      <h2>#{title}</h2>
      <p>
        It works!
      </p>
      <p>
        #{link_to "Back", :root} | #{link_to "Comments", :entries, entry_id, 'comments'}
      </p>
    end_content
  end

  # /blog/entries/entry-id-for-show-content/comments
  get entry_comments_path do |entry_id|
    title = entry_id.gsub('-',' ').capitalize
    <<-end_content
      <h1>Welcome to Foo Web Application</h1>
      <h2>#{title}</h2>
      <p>
        It works and show comments for "#{title}".
      </p>
      <p>
        #{link_to "Back", :root}
      </p>
    end_content
  end

  get tagged_entries_path do |tag_id|
    <<-end_content
      <h1>Welcome to Foo Web Application</h1>
      <h2>#{tag_id.capitalize}</h2>
      <p>
        It works and show all entries tagged with "#{tag_id}".
      </p>
      <p>
        #{link_to "Back", :root}
      </p>
    end_content
  end

end

Run:

$ ruby webfoo.rb -p 3000

Open Web browser localhost:3000/blog/ and look … it works!

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