Rails - May 2006 - Migrations: The same class name form migration and model cause problems

I need to bootstrap my database when creating schema. My model class and
migration class are the same.

When I trying: ClassName.create :foo => ''bar'' in migration
I got:

undefined method `create'' for
#<ActiveRecord::ConnectionAdapters::PostgreSQLAdapter:0xb75a357c>

How to avoid this? I think the same class names causes problem, but I
can''t change class names.