fixture_references: "Mysql::Error #HY000"?

I've been trying to use fixture references, and I seem to be getting lots of:

  1) Error: test_truth(DeviceTest): ActiveRecord::StatementInvalid: Mysql::Error: #HY000Field 'description_id' doesn 't have a default value: INSERT INTO devices (`id`) VALUES (2)     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/connection _adapters/abstract_adapter.rb:128:in `log'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/connection _adapters/mysql_adapter.rb:243:in `execute'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:290:in `insert_fixtures'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:289:in `each'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:289:in `insert_fixtures'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:257:in `create_fixtures_without_references'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:257:in `each'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:257:in `create_fixtures_without_references'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/connection _adapters/abstract/database_statements.rb:59:in `transaction'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:255:in `create_fixtures_without_references'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/base.rb:86 7:in `silence'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:248:in `create_fixtures_without_references'     /home/hgs/aeg_intranet/csestore/config/../vendor/plugins/fixture_references/ lib/fixture_references.rb:92:in `create_fixtures'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:593:in `load_fixtures'     /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/fixtures.r b:538:in `setup'

But AFAICS the fixture data looks OK

# Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html <%   fixtures :devices, :descriptions %> olympus400_in:   id: 1   description_id: <%= descriptions(:C_400, 'id') %>   serialno: 238553902   barcode: 16301   state: 'in stock'   categorypath: 'Still Picture Camera'   lock_version: 1

and I tried the old form   description_id: <%= descriptions(:C_400)['id'] %>

but get the same error. The data does exist in the descriptions table:

C_400:   :text: Olympus C-400 Zoom   :id: 7   :picture: ""

What is puzzling me is that 1) I don't assume a default, 2) MySQL error numbers are normally purely numeric, and google maps this HY000 to many things..

Any idea what I should be looking at for this, please? This is rails 1.2.3 under cygwin.

        Thank you,         Hugh