add basic support for file attachments

lib/mongo_mapper_ext.rb

@@ -1,5 +1,6 @@
 require 'mongo_mapper_ext/gems'
 require 'mongo_mapper'
+require 'carrierwave'
 
 [
   'hacks/fixes',
@@ -15,6 +16,7 @@
   'plugins/default_scope',
   # 'plugins/db_config',  
   'plugins/attributes_cache',
+  'plugins/carrierwave',
   'plugins/micelaneous',  
 ].each do |file|
   require "mongo_mapper_ext/#{file}"

lib/mongo_mapper_ext/gems.rb

@@ -1,3 +1,8 @@
+# core gems
+gem 'mongo_mapper', '0.9.0'
+
+gem 'carrierwave',   '0.5.3'
+
 # dependencies for core gems
 gem 'i18n', '0.5.0'
 gem 'activesupport', '3.0.7'
@@ -8,5 +13,5 @@
 gem 'plucky', '0.3.6'
 gem 'jnunemaker-validatable', '1.8.4'
 
-# core gems
-gem 'mongo_mapper', '0.9.0'
+gem 'mini_magick',   '3.2.1'
+gem 'subexec',       '0.0.4'

lib/mongo_mapper_ext/plugins/carrierwave.rb

@@ -0,0 +1,71 @@
+require 'carrierwave/validations/active_model'
+
+# 
+# Hacks
+# 
+CarrierWave::SanitizedFile.class_eval do
+  def sanitize_regexp
+    /[^[:word:]\.\-\+\s_]/i
+  end
+end
+
+CarrierWave::Uploader::Cache.class_eval do
+  def original_filename=(filename)
+    raise CarrierWave::InvalidParameter, "invalid filename" unless filename =~ /\A[[:word:]\.\-\+\s_]+\z/i
+    @original_filename = filename
+  end
+end
+
+
+# 
+# mount_uploader
+# 
+module MongoMapper
+  module Plugins
+    module CarrierWave
+      extend ActiveSupport::Concern
+
+      module ClassMethods
+        include ::CarrierWave::Mount
+        ##
+        # See +CarrierWave::Mount#mount_uploader+ for documentation
+        #
+        def mount_uploader(column, uploader, options={}, &block)
+          define_key column, uploader, options
+
+          super
+
+          alias_method :read_uploader, :read_attribute
+          alias_method :write_uploader, :write_attribute
+
+          include ::CarrierWave::Validations::ActiveModel
+
+          validates_integrity_of  column if uploader_option(column.to_sym, :validate_integrity)
+          validates_processing_of column if uploader_option(column.to_sym, :validate_processing)
+
+          after_save "store_#{column}!".to_sym
+          before_save "write_#{column}_identifier".to_sym
+          after_destroy "remove_#{column}!".to_sym
+        end
+
+        protected
+          def define_key column, uploader, options
+            options[:mount_on] ||= "#{column}_filename"
+            name = options[:mount_on]
+            key name
+
+            # # not allowin
+            # before_save do |model|
+            #   filename = model.send(name).filename
+            #   
+            # end
+            # rad.extension(:kit_carrierwave, self){validates_uniqueness_of name}
+            #             
+            # ensure_index name
+          end
+      end
+    end
+  end
+end
+
+MongoMapper::Document.include MongoMapper::Plugins::CarrierWave

spec/carrierwave_spec.rb

@@ -0,0 +1,52 @@
+require 'spec_helper'
+
+require "mongo_mapper_ext"
+require "mongo_mapper_ext/spec"
+
+describe "MongoMapper & CarrierWave" do  
+  with_mongo_mapper
+  with_test_database
+  with_tmp_spec_dir
+
+  before :all do
+    MongoMapper.database = 'test'    
+
+    class PlaneUploader < CarrierWave::Uploader::Base
+      storage :file
+
+      class << self
+        attr_accessor :store_dir
+      end      
+
+      def store_dir
+        self.class.store_dir
+      end
+    end
+
+    class Plane
+      include MongoMapper::Document
+
+      # key :image, String
+      mount_uploader :image, PlaneUploader
+    end        
+  end
+
+  before do
+    PlaneUploader.store_dir = "#{spec_dir}/data"
+  end
+
+  after :all do
+    remove_constants :Plane, :PlaneUploader
+  end
+
+  it "basic" do
+    plane = Plane.new
+    File.open "#{spec_dir}/plane.jpg" do |f|
+      plane.image = f
+      plane.save!
+    end
+
+    plane.image.current_path.should == '/tmp/carrierwave_spec/data/plane.jpg'
+    File.should exist("#{spec_dir}/data/plane.jpg") #.to_file.exist?.should be_true
+  end
+end