I have been studying/working from the “Agile Rails” book for a little
while, and I am at the point where we are building the program called
‘depot’, I am doing my second migrate and I receive an error… the error
is as follows:
C:\InstantRails\rails_apps\depot>rake db:migrate
(in C:/InstantRails/rails_apps/depot)
== AddPrice: migrating
========================================================
-- add_column(:products, :price, :decimal, {:precision=>8, :scale=>2,
:default=>
0})
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.[]
(See full trace by running task with --trace)
C:\InstantRails\rails_apps\depot>
The code I am using is directly from the book itself, and I have been
trying to research this on the rails documentation, but its of little
use… the code is pasted below…
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
As well, (maybe its convenient), I have pasted the versions of
everything I am currently running.
Ruby version 1.8.5 (i386-mswin32)
RubyGems version 0.9.0
Rails version 1.1.6
Active Record version 1.14.4
Action Pack version 1.12.5
Action Web Service version 1.1.6
Action Mailer version 1.2.5
Active Support version 1.3.1
Application root C:/InstantRails/rails_apps/depot
Environment development
Database adapter mysql
Database schema version 1
I hope someone is able to help, I am wanting to study more, and learn,
but this is sorta breaking that apart
Thanks for any help!