More transitive-property work.

- Add some more tests that break the current SQL backend implementation
  for transitive properties.  One of them looks like a Postgres bug to
  me -- I'm getting:
  """ProgrammingError: ERROR:  relation "_user2" does not exist"""
  where _user2 is an alias for _user in the from clause (but _user2 is
  used in a left outer join). The other SQL backends are fine with the
  generated SQL. Hmm. One of the reasons for packing sort and search
  attributes into the same data structure was the optimized SQL: not
  creating a left outer join for attributes that are already in a normal
  join (from/where clause). I'll check if I can instead leave the
  attribute from the from-clause instead (or if I'm then getting errors
  from the other backends, Postgres seems fine with that).

Author: Ralf Schlatterbeck

test/db_test_base.py

@@ -15,7 +15,7 @@
 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 #
-# $Id: db_test_base.py,v 1.77 2006-08-23 12:57:10 schlatterbeck Exp $
+# $Id: db_test_base.py,v 1.78 2006-08-30 08:50:44 schlatterbeck Exp $
 
 import unittest, os, shutil, errno, imp, sys, time, pprint, sets
 
@@ -1122,6 +1122,8 @@ def testFilteringLinkSortGroup(self):
             ['4', '3'])
         ae(filt(None, {'priority.order':'3'}, ('+','status'), ('+','priority')),
             ['4', '3'])
+        ae(filt(None, {'priority':['2','3']}, ('+','priority'), ('+','status')),
+            ['1', '4', '2', '3'])
         ae(filt(None, {}, ('+','priority'), ('+','status')),
             ['1', '4', '2', '3'])
 
@@ -1252,6 +1254,16 @@ def testFilteringTransitiveLinkSort(self):
             ('+','assignedto.supervisor.supervisor'),
             ('-','assignedto.supervisor'), ('+','assignedto'), ('+','status')]),
             ['4', '5', '7', '6', '8', '1', '2', '3'])
+        ae(filt(None, {'assignedto':['6','7','8','9','10']},
+            [('+','assignedto.supervisor.supervisor.supervisor'),
+            ('+','assignedto.supervisor.supervisor'),
+            ('-','assignedto.supervisor'), ('+','assignedto'), ('+','status')]),
+            ['4', '5', '7', '6', '8', '1', '2', '3'])
+        ae(filt(None, {'assignedto':['6','7','8','9']},
+            [('+','assignedto.supervisor.supervisor.supervisor'),
+            ('+','assignedto.supervisor.supervisor'),
+            ('-','assignedto.supervisor'), ('+','assignedto'), ('+','status')]),
+            ['4', '5', '1', '2', '3'])
 
     def testFilteringTransitiveLinkSortNull(self):
         """Check sorting of NULL values"""