fix object de-authorize failed.

Gemfile

@@ -53,7 +53,7 @@ gem 'mongoid-encryptor', :require => 'mongoid/encryptor'
 gem 'rb-readline','~> 0.4.2' if RUBY_PLATFORM.downcase.include?("linux")
 
 
-gem "impressionist", :git => 'git://github.com/charlotte-ruby/impressionist.git'
+gem "impressionist",'1.2.0'
 #gem 'contacts'
 #gem 'event-calendar', :require => 'event_calendar'#, :git => 'git://github.com/elevation/event_calendar.git'
 

app/models/prototype_auth.rb

@@ -51,8 +51,9 @@ class PrototypeAuth
   end
   
   def remove_operation(item,obj)
-    if (self.send item).include? obj
-       (self.send item).delete obj
+    item = (item.to_s.singularize == item.to_s) ? "#{item.to_s}_id" : "#{item.to_s.singularize}_ids"
+    if (self.send item).include? obj.id
+       (self.send item).delete obj.id
       self.save!
     else
       false #should put error message for user not existed in list

config/mongoid.yml

@@ -0,0 +1,24 @@
+defaults: &defaults
+  host: localhost
+  # slaves:
+  #   - host: slave1.local
+  port: 27017
+  #   - host: slave2.local
+  #     port: 27019
+
+development:
+  <<: *defaults
+  database: demo_site_development
+test:
+  <<: *defaults
+  database: test_site
+
+# set these environment variables on your prod server
+production:
+  # host: <%= ENV['MONGOID_HOST'] %>
+  # port: <%= ENV['MONGOID_PORT'] %>
+  # username: <%= ENV['MONGOID_USERNAME'] %>
+  # password: <%= ENV['MONGOID_PASSWORD'] %>
+  # database: <%= ENV['MONGOID_DATABASE'] %>
+  <<: *defaults
+  database: demo_site_production