Hi --
On Tue, 20 Jan 2009, groovetrain wrote:
>
> I've searched through the forum and google, and to no avail. I cannot
> seem to find the solution to my problem. No one has ever defined this
> as a rake problem. Anyway, it's when my db:migrate tries to process
> this migration:
>
> class AddPaymentTypeData < ActiveRecord::Migration
> def self.up
> Payment_type.delete_all
>
> Payment_type.create(:type => 'Check')
> Payment_type.create(:type => 'Credit Card')
> Payment_type.create(:type => 'Purchase Order')
> end
>
> def self.down
> Payment_type.delete_all
> end
> end
>
> that it gives me the error:
> rake aborted!
> Expected /Users/joel/Sites/depot/app/models/payment_type.rb to define
> Payment_type
>
>
> I have a payment_type.rb file:
>
> class PaymentType < ActiveRecord::Base
>
> has_many :orders
>
> end
>
> This is in the right place, in the path that the rake task is
> complaining that it isn't. Does anyone have any idea why this is
> happening? I'm sure someone has run into this before. I'm using
> rails 2.2.2, ruby 1.8.
The short answer is: change Payment_type to PaymentType in your create
statments (and everywhere else).
Longer answer:
Rails has a "magic" way of resolving references to unknown constants.
If you refer, say, to PaymentType, without having defined it, Rails
does the following:
1. convert "PaymentType" to its canonical "underscore" equivalent,
"payment_type"
2. add ".rb" to the end
3. search the file load-path for a file called that
("payment_type.rb")
4. load the file
5. confidentally assume that PaymentType is now defined
You made it as far as 4 (it found app/models/payment_type.rb), but
only by coincidence: you used "Payment_type", which also turns into
"payment_type.rb". So the file was found -- but at no point inside the
file did you define a constant called "Payment_type". What you really
want is for Rails to be looking for the constant PaymentType, not
Payment_type, and that's why you need to correct your Payment_type
references to PaymentType. (And in any case, you need to use the same
name for the same constant consistently :-)
David
--
David A. Black / Ruby Power and Light, LLC
Ruby/Rails consulting & training: http://www.rubypal.com
Coming in 2009: The Well-Grounded Rubyist (http://manning.com/black2)
http://www.wishsight.com => Independent, social wishlist management!
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Ruby
on Rails: Talk" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---
