Hii have problem running rake db:test:purge ( my test database is empty ) : adter running with trace it shouts :
matthew:rails code pietia$ rake db:test:purge --trace (in /Users/pietia/Documents/praca/projekty/silk/rails code) ** Invoke db:test:purge (first_time) ** Invoke environment (first_time) ** Execute environment ** Execute db:test:purge rake aborted! You have a nil object when you didn't expect it! You might have expected an instance of ActiveRecord::Base. The error occurred while evaluating nil. /Users/pietia/Documents/praca/projekty/silk/rails code/vendor/rails/ railties/lib/tasks/databases.rake:347 /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `call' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:617:in `execute' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `each' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:612:in `execute' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:578:in `invoke_with_call_chain' /opt/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:571:in `invoke_with_call_chain' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:564:in `invoke' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:2027:in `invoke_task' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `top_level' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `each' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:2005:in `top_level' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:2044:in `standard_exception_handling' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:1999:in `top_level' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:1977:in `run' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:2044:in `standard_exception_handling' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/lib/rake.rb:1974:in `run' /Users/pietia/.gem/ruby/1.8/gems/rake-0.8.4/bin/rake:31 /opt/local/bin/rake:19:in `load' /opt/local/bin/rake:19