PaperclipSchema

paperclip_schema.gemspec

Gem::Specification.new do |s|
  s.name         = 'paperclip_schema'
  s.summary      = 'A Ruby Micro Gem for use Paperclip with ActiveRecordSchema and S3.'
  s.version      = '0.0.2'
  s.platform     = Gem::Platform::RUBY

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

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

  s.add_dependency 'paperclip' 
  s.add_dependency "active_record_schema"
end

paperclip_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.

module PaperclipSchema
  extend ActiveSupport::Concern

  module ClassMethods

    def has_attached(name, options = {})

      options[:url]  ||= "/attachments/:class/:id/:attachment/:style/:basename.:extension"
      options[:path] ||= ":rails_root/public/attachments/:class/:id/:attachment/:style/:basename.:extension"

      if Rails.env.production?
        options[:storage] = 's3'
        options[:s3_credentials] = Rails.root.join("config", "s3.yml")
      else
        options[:storage] = 'filesystem'
      end
      has_attached_file(name, options)
      
      field :"#{name}_file_name"
      field :"#{name}_content_type"
      field :"#{name}_file_size", :as => :integer
      field :"#{name}_updated_at", :as => :datetime

      validate do |record|
        if record.send(name) && !record.send(name).errors.empty?
          file_name = record.send(:"#{name}_file_name")
          record.errors.add name, "Paperclip returned errors for file '#{file_name}' - check ImageMagick installation or image source file."
          false
        end
      end

    end

  end # ~ ClassMethods

end

ActiveRecord::Base.send :include, PaperclipSchema