Changed Enumerations to use a Single Table Inheritance

* Added migrations to change Enumerations to an STI relationship
* Added TimeEntryActivity model (STI)
* Added DocumentCategory model (STI)
* Added IssuePriority model (STI)
* Added Enumeration#get_subclasses to get a list of the subclasses of Enumeration
* Changed Enumeration to use the STI type field instead of the opt field
* Changed Enumeration#opt to return the old opt values but with a deprecation warning.
* Removed Enumeration::OPTIONS
* Removed the dynamic named_scopes in favor of specific named_scopes.  Kept for
  compatibility reasons.
* Added Enumeration#default so each subclass can easily find it's default record.
* Fixed Enumeration#default to use the STI scoping with a fake default scope for finding Enumeration's default.
* Added a 'all' named scope for getting all records in order by position.
* Added Deprecation warnings to the old named_scopes in Enumerations.
* Moved various methods off of Enumeration and onto the concrete classes
* Changed the EnumerationsController to use types
* Updated the Enumeration list template
* Added has_many relationships to the Enumeration STI classes.
* Fixes for tests.

  #3007

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2777 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/issues_helper.rb

@@ -68,8 +68,8 @@ module IssuesHelper
         u = User.find_by_id(detail.value) and value = u.name if detail.value
         u = User.find_by_id(detail.old_value) and old_value = u.name if detail.old_value
       when 'priority_id'
-        e = Enumeration.find_by_id(detail.value) and value = e.name if detail.value
-        e = Enumeration.find_by_id(detail.old_value) and old_value = e.name if detail.old_value
+        e = IssuePriority.find_by_id(detail.value) and value = e.name if detail.value
+        e = IssuePriority.find_by_id(detail.old_value) and old_value = e.name if detail.old_value
       when 'category_id'
         c = IssueCategory.find_by_id(detail.value) and value = c.name if detail.value
         c = IssueCategory.find_by_id(detail.old_value) and old_value = c.name if detail.old_value

app/helpers/timelog_helper.rb

@@ -27,7 +27,7 @@ module TimelogHelper
   end
   
   def activity_collection_for_select_options
-    activities = Enumeration.activities
+    activities = TimeEntryActivity.all
     collection = []
     collection << [ "--- #{l(:actionview_instancetag_blank_option)} ---", '' ] unless activities.detect(&:is_default)
     activities.each { |a| collection << [a.name, a.id] }