# Rake aborted problem **URL:** \ **Category:** Ruby\ **Created:** [January 19, 2007, 4:30pm UTC](https://www.ruby-forum.com/t/rake-aborted-problem/82478 "2007-01-19T16:30:47Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![rails-nooby](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e19adc/32.png) [@rails-nooby](https://www.ruby-forum.com/u/rails-nooby)\ **Post date:** [January 19, 2007, 4:30pm UTC](https://www.ruby-forum.com/t/rake-aborted-problem/82478/1 "2007-01-19T16:30:47Z")
Hi all, I know this is something probably really simple, but since I’m a noob I’m stuck and can’t figure it out. I’m doing the depot project/tutorial in the Agile Web D. with Rails. Here’s what happens, while trying to add the second migration, adding a missing column, I generate the migration, 002\_add\_price.rb, then make the changes as outlined in the book: 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 and then run rake db:migrate…which fails. Here is the --trace # C:\instantrails\work\depot\>rake db:migrate --trace (in C:/instantrails/work/depot) \*\* Invoke db:migrate (first\_time) \*\* Invoke environment (first\_time) \*\* Execute environment \*\* Execute db:migrate == 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.[] C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active\_record/connection\_adapters/abstract/schema\_statements.rb:259:in `type_to _sql' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active_record/connection_adapters/abstract/schema_statements.rb:122:in`add\_col umn’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active\_record/migration.rb:273:in `send' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active_record/migration.rb:273:in`method\_missing’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active\_record/migration.rb:257:in `say_with_time' C:/instantrails/InstantRails/ruby/lib/ruby/1.8/benchmark.rb:293:in`measure’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active\_record/migration.rb:257:in `say_with_time' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active_record/migration.rb:271:in`method\_missing’ ./db/migrate//002\_add\_price.rb:3:in `real_up' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active_record/migration.rb:210:in`send’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active\_record/migration.rb:210:in `migrate' C:/instantrails/InstantRails/ruby/lib/ruby/1.8/benchmark.rb:293:in`measure’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active\_record/migration.rb:210:in `migrate' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active_record/migration.rb:333:in`migrate’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active\_record/migration.rb:328:in `each' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active_record/migration.rb:328:in`migrate’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active\_record/migration.rb:295:in `up' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4 /lib /active_record/migration.rb:286:in`migrate’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6 /lib/tasks/d atabases.rake:4 C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 387:in `call' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 387:in`execute’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 387:in `each' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 387:in`execute’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 357:in `invoke' C:/instantrails/InstantRails/ruby/lib/ruby/1.8/thread.rb:135:in`synchronize’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 350:in `invoke' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 1906:in`run’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 1906:in `each' C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /lib/rake.rb: 1906:in`run’ C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 /bin/rake:7 C:/instantrails/InstantRails/ruby/bin/rake.bat:25:in `load’ C:/instantrails/InstantRails/ruby/bin/rake.bat:25 Can anyone tell me what’s happening and how you can decipher that info from above…so I can learn to troubleshoot on my own. Another thing to add is that this did work, and I deleted the project and was trying to run through it again. Thank you in advance for your help, Greg – “Politicians are like diapers, both need to be changed frequently and for the same reasons.” Greg P. removed\_email\_address@domain.invalid ---
**Author:** ![rails-nooby](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e19adc/32.png) [@rails-nooby](https://www.ruby-forum.com/u/rails-nooby)\ **Post date:** [January 19, 2007, 4:30pm UTC](https://www.ruby-forum.com/t/rake-aborted-problem/82478/2 "2007-01-19T16:30:54Z")
Disregard. I guess I missed updating my application to 1.2, but for the life of me can not ever remember doing that before, though I must have because my previous depot app worked fine…sorry to bother. On 1/13/07, Greg P. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > class AddPrice \< ActiveRecord::Migration > and then run rake db:migrate…which fails. > – add\_column(:products, :price, :decimal, {:precision=\>8, :scale=\>2, > `type_to /active_record/migration.rb:273:in `send’ > C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord- > /lib > /active\_record/migration.rb:210:in `migrate' /lib /lib/tasks/d C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 C:/instantrails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1 C:/instantrails/InstantRails/ruby/bin/rake.bat:25:in `load’ > Greg > > – > “Politicians are like diapers, both need to be changed frequently and for > the same reasons.” > > Greg P. > removed\_email\_address@domain.invalid – “Politicians are like diapers, both need to be changed frequently and for the same reasons.” Greg P. removed\_email\_address@domain.invalid