rake db:migrate problem

rubyonrails-talk
1

I am just starting out learning RoR. I am trying to follow along with the Depot project in "Agile Web Development With Rails ed2" and get the error "You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occured while evaluating nil." I ran --trace and get the following, but I am not sure what it means. Can anyone help me make sense out of it? Thanks

Mike Rensing

(in /Users/mike/work/depot) ** Invoke db:migrate (first_time) ** Invoke environment (first_time) ** Execute environment ** Execute db:migrate == AddPrice: migrating

-- add_column(:products, :price, :decimal, {:default=>0, :precision=>8, :scale=>2}) rake aborted! You have a nil object when you didn't expect it!