FriendlyIdSchema is a micro gem for Ruby on Rails with which you can add permalinks to models with ActiveRecordSchema and FriendlyId

README.md

FriendlyIdSchema

FriendlyIdSchema is a micro gem that combines FriendlyId with ActiveRecordSchema

Usage

Call #permalink inside a model like this:

class Post
  permalink

  field :title
  
end

and then run rails g migration with --from option to let ActiveRecordSchema generate the required migration

ex.

rails g migration add_permalink_to_posts --from Post

Specify a field to derive permalink

class User
  field :name
  permalink :name
  
end

Use history

Run these commands first:

rails generate friendly_id
rake db:migrate

class Post
  permalink :history => true

  field :title
  
end

friendly_id_schema.gemspec

Gem::Specification.new do |s|
  s.name         = 'friendly_id_schema'
  s.summary      = 'A Ruby Micro Gem for use FriendlyId with ActiveRecordSchema.'
  s.version      = '0.1.1'
  s.platform     = Gem::Platform::RUBY

  s.files        = %w(friendly_id_schema.rb)
  s.require_path = '.'

  s.author      = 'Maurizio Casimirri'
  s.email       = 'maurizio.cas@gmail.com'

  s.add_dependency "friendly_id", "~> 4.0.1"
  s.add_dependency "active_record_schema"
end

friendly_id_schema.rb

#  Author::    Maurizio Casimirri (mailto:maurizio.cas@gmail.com)
#  Copyright:: Copyright (c) 2012 Maurizio Casimirri
#  
#  Permission is hereby granted, free of charge, to any person obtaining
#  a copy of this software and associated documentation files (the
#  "Software"), to deal in the Software without restriction, including
#  without limitation the rights to use, copy, modify, merge, publish,
#  distribute, sublicense, and/or sell copies of the Software, and to
#  permit persons to whom the Software is furnished to do so, subject to
#  the following conditions:
#  
#  The above copyright notice and this permission notice shall be
#  included in all copies or substantial portions of the Software.
#  
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
#  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
#  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
#  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
#  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
#  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
#  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

require 'friendly_id'

module FriendlyIdSchema
  extend ActiveSupport::Concern
  
  module ClassMethods
    def permalink(method, options = {})
      use = options[:history] ? :history : :slugged
      
      field :slug, :index => { :unique => true }
      validates :slug, :presence => true, :uniqueness => true
      
      if ActiveRecord::Base.connection.table_exists?(self.table_name)
        self.send :extend, FriendlyId
        friendly_id method, :use => use        
      end
    end
  end
  
end

ActiveRecord::Base.send :include, FriendlyIdSchema