Help please: AWDWR -- Migration failure

Rails
1

I’m having a problem with one of the migration files from the depot
application.

** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
== AddPrice: migrating

– add_column(:products, :price, :decimal, {:scale=>2, :default=>0,
:precision=>
8})
rake aborted!
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’ve checked this against the latest pdf of the book so it all seems to
jive.
Here is the migration file:

#—

Excerpted from “Agile Web D. with Rails, 2nd Ed.”

We make no guarantees that this code is fit for any purpose.

Visit http://www.pragmaticprogrammer.com/titles/rails2 for more book

information.
#—
class AddPrice < ActiveRecord::Migration
def self.up
add_column :products, :price, :decimal, :precision => 8, :scale =>
2, :default => 0
end

def self.down
remove_column :products, :price
end
end

Stuart

2

On Aug 2, 2006, at 8:37 AM, Dark A. wrote:

I’ve checked this against the latest pdf of the book so it all
seems to jive.
Here is the migration file:

Are you running Edge Rails? You need it for decimal support

Dave

3

Thanks Dave, I am not but can set it up for Depot. I forgot that you
had mentioned it prior.

Stuart