Interpolate any method ofmodel into url and path

README

@@ -71,6 +71,23 @@ If you are using the file system to store files, you can specify the directory/f
 
 OBS: The default directory is ’/:rails_root/public/system/:attachment/:id/:style/:filename’
 
+
+Also you can interpolate any method result of the model
+
+  class Foo
+    include MongoMapper::Document
+    plugin AttachIt
+    has_attachment :photo, { :url => '/:model.say_greet/users/:model.say_farewell/:id/:filename', :path => ':rails_root/public/:model.say_greet/:model.say_farewell/users/:id/:filename' }
+
+    def say_greet
+      'hello'
+    end
+
+    def say_farewell
+      'bye'
+    end
+  end
+
 Where:
 * :rails_root - is the root directory of your Rails application
 * :environment - can be "production", "test" or "development"
@@ -80,6 +97,7 @@ Where:
 * :style - if you specified the styles
 * :filename - the name of the file
 * :extension - the extension of the file
+* :model.METHOD_NAME - where METHOD_NAME is any method of the model
 
 === View
 

README.rdoc

@@ -71,6 +71,23 @@ If you are using the file system to store files, you can specify the directory/f
 
 OBS: The default directory is ’/:rails_root/public/system/:attachment/:id/:style/:filename’
 
+
+Also you can interpolate any method result of the model
+
+  class Foo
+    include MongoMapper::Document
+    plugin AttachIt
+    has_attachment :photo, { :url => '/:model.say_greet/users/:model.say_farewell/:id/:filename', :path => ':rails_root/public/:model.say_greet/:model.say_farewell/users/:id/:filename' }
+
+    def say_greet
+      'hello'
+    end
+
+    def say_farewell
+      'bye'
+    end
+  end
+
 Where:
 * :rails_root - is the root directory of your Rails application
 * :environment - can be "production", "test" or "development"
@@ -80,6 +97,7 @@ Where:
 * :style - if you specified the styles
 * :filename - the name of the file
 * :extension - the extension of the file
+* :model.METHOD_NAME - where METHOD_NAME is any method of the model
 
 === View
 

lib/attach_it/attach_it.rb

@@ -72,8 +72,10 @@ def information_for(name = nil, options = nil)
     end
 
     def save_attachments
-      @attachment_options.keys.each do |name|
-        @attachment_options[name].save
+      unless @attachment_options.nil?
+        @attachment_options.keys.each do |name|
+          @attachment_options[name].save
+        end
       end
     end
 

lib/attach_it/attachment_options.rb

@@ -114,6 +114,9 @@ def interpolate(source = nil, style_name = nil)
     result.gsub!(/\:class/, @class_name)
     result.gsub!(/\:attachment/, @attachment)
     result.gsub!(/(\/){2,}/, '/')
+    while result.match(/:model\.([A-Za-z\_]+)/)
+      result.sub!(/:model\.[A-Za-z\_]+/, @model.send($1))
+    end
     result
   end
 

test/test_helper.rb

@@ -116,6 +116,21 @@ class UserTwelve
   has_attachment :avatar, { :styles => { :small => '150x150>', :medium => '300x300>' }, :storage => 'gridfs' }
 end
 
+class UserThirteen
+  include MongoMapper::Document
+  plugin AttachIt
+  key :name, String 
+  has_attachment :avatar, { :url => '/:model.say_greet/users/:model.say_farewell/:id/:filename', :path => ':rails_root/public/:model.say_greet/:model.say_farewell/users/:id/:filename' }
+
+  def say_greet
+    'hello'
+  end
+
+  def say_farewell
+    'bye'
+  end
+end
+
 class DocumentOne
   include MongoMapper::Document
   plugin AttachIt

test/unit/test_attach_it.rb

@@ -284,4 +284,20 @@ class TestAttachIt < Test::Unit::TestCase
 
   end
 
+  context "Iterpolate model methods" do
+    setup do
+      @user = UserThirteen.new
+      @user.name = 'Myname'
+      @user.avatar = File.open(JpgImageFile, 'rb')
+      @user.save
+    end
+
+    should "show methods returns" do
+      assert_match('hello', @user.avatar.path)
+      assert_match('bye', @user.avatar.path)
+      assert_match('hello', @user.avatar.url)
+      assert_match('bye', @user.avatar.url)
+    end
+  end
+
 end