Rails core - Feb 2006 - Sybase unit tests failing on :polymorphic

I''m trying to figure out what I might be missing in the Sybase  
connection adapter (http://dev.rubyonrails.org/ticket/3765) that''s  
flunking some of the polymorphic unit tests in  
associations_join_model_test.rb.  Specifically, these four tests are  
failing:

   test_polymorphic_has_many_create_model_with_inheritance
   test_polymorphic_has_one_create_model_with_inheritance
   test_set_polymorphic_has_many
   test_set_polymorphic_has_one

Any ideas?  The INSERT into taggings is setting a NULL tag_id.  I  
assume there''s something new and subtle that I''m missing in
the
adapter code.

Here''s the stack:

test_polymorphic_has_many_create_model_with_inheritance 
(AssociationsJoinModelTest):
ActiveRecord::StatementInvalid: ActiveRecord::StatementInvalid:  
RuntimeError: SQL Command Failed for Tagging Create: INSERT INTO  
taggings ([tag_id], [taggable_type], [taggable_id]) VALUES(NULL,  
''Post'', 2)
Message: The column tag_id in table taggings does not allow null values.
: INSERT INTO taggings ([tag_id], [taggable_type], [taggable_id])  
VALUES(NULL, ''Post'', 2): INSERT INTO taggings ([tag_id],  
[taggable_type], [taggable_id]) VALUES(NULL, ''Post'', 2)
     ./../lib/active_record/connection_adapters/abstract_adapter.rb: 
94:in `log''
     ./../lib/active_record/connection_adapters/sybase_adapter.rb: 
140:in `insert''
     ./../lib/active_record/base.rb:1514:in `create_without_callbacks''
     ./../lib/active_record/callbacks.rb:261:in  
`create_without_timestamps''
     ./../lib/active_record/timestamp.rb:30:in `create''
     ./../lib/active_record/base.rb:1495:in  
`create_or_update_without_callbacks''
     ./../lib/active_record/callbacks.rb:249:in `create_or_update''
     ./../lib/active_record/base.rb:1289:in `save_without_validation''
     ./../lib/active_record/validations.rb:708:in  
`save_without_transactions''
     ./../lib/active_record/transactions.rb:126:in `save''
     ./../lib/active_record/transactions.rb:126:in `transaction''
     ./../lib/active_record/transactions.rb:91:in `transaction''
     ./../lib/active_record/transactions.rb:118:in `transaction''
     ./../lib/active_record/transactions.rb:126:in `save''
     ./../lib/active_record/associations/association_collection.rb: 
88:in `create''
     associations_join_model_test.rb:50:in  
`test_polymorphic_has_many_create_model_with_inheritance''

Thanks,
John

-- 
John R. Sheets
http://umber.sourceforge.net
http://writersforge.sourceforge.net