Custom fields can now be reordered.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@901 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/078_add_custom_fields_position.rb

@@ -0,0 +1,15 @@
+class AddCustomFieldsPosition < ActiveRecord::Migration
+  def self.up
+    add_column(:custom_fields, :position, :integer, :default => 1)
+    CustomField.find(:all).group_by(&:type).each_value  do |fields|
+      fields.each_with_index do |field, i|
+        # do not call model callbacks
+        CustomField.update_all "position = #{i+1}", {:id => field.id}
+      end
+    end
+  end
+
+  def self.down
+    remove_column :custom_fields, :position
+  end
+end