adds a new user settings system + migration + rake task/worker updates

db/migrate/20130605112109_create_settings.rb

@@ -0,0 +1,17 @@
+class CreateSettings < ActiveRecord::Migration
+  def self.up
+    create_table :settings do |t|
+      t.string :var, null: false
+      t.text   :value, null: true
+      t.integer :thing_id, null: true
+      t.string :thing_type, limit: 30, null: true
+      t.timestamps
+    end
+    
+    add_index :settings, [ :thing_type, :thing_id, :var ], unique: true
+  end
+
+  def self.down
+    drop_table :settings
+  end
+end

db/migrate/20130605235825_migrate_user_settings.rb

@@ -0,0 +1,34 @@
+class MigrateUserSettings < ActiveRecord::Migration
+  def up
+    old_settings = ConfigurableSetting.all
+    
+    old_settings.each do |old_setting|
+      # get target (user)
+      type      = old_setting.configurable_type
+      id        = old_setting.configurable_id
+      user      = type.constantize.find(id)
+      
+      # get the data (settings)
+      name      = old_setting.name
+      namespace = name.split('.')[0]
+      key       = name.split('.')[1].underscore # Camelcase to underscore
+      
+      # prepare value
+      value     = YAML.load(old_setting.value)
+      value     = value.nil? ? false : value
+      
+      # set the settings_attributes (thanks to settings.merge! we can set them one by one)
+      user.settings_attributes = {
+        "#{namespace}" => {
+          "#{key}" => value
+        }
+      }
+      
+      # save the user to apply after_save callback
+      user.save
+    end
+  end
+
+  def down
+  end
+end