Validating to see if item can be destroyed

Rails
1

Hey all. I think I flooded #rubyonrails too much I’m not getting
replies anymore… hehe.

Let’s say I have two models: Idea and IdeaImage. Idea has_many
:idea_images and IdeaImage belongs_to :idea. Here’s my question: how
do I allow deletion only if there is more than 1 idea_image left in
idea?

Here are the different scenarios I’ve tried:

http://pastie.caboo.se/151482

I’m stumped :o

Thanks,

Ramon T.

2

Ok, super weird… I put a debugger:

def validate_as_destroyable
debugger
if idea.idea_images.size <= 1
return false
end
end

in the debugger i type idea. it works. i type idea.idea_images. it
works. in my log i still get the same error though…

NoMethodError (You have a nil object when you didn’t expect it!
The error occurred while evaluating nil.idea_images):
/app/models/idea_image.rb:25:in `validate_as_destroyable’

On Feb 13, 2008 9:14 PM, Ramon Miguel M. Tayag [email protected]
wrote:

Hey all. I think I flooded #rubyonrails too much I’m not getting
replies anymore… hehe.

–
Ramon T.

3

I’ve fallen into this trap SO MANY times before…

It was failing because I was using attachment_fu and the thumbnails’
idea_id were nil. Ugh… sorry for wasting your time (and mine, haha!)

On Wed, Feb 13, 2008 at 10:24 PM, Ramon Miguel M. Tayag
[email protected] wrote:

works. in my log i still get the same error though…

NoMethodError (You have a nil object when you didn’t expect it!
The error occurred while evaluating nil.idea_images):
/app/models/idea_image.rb:25:in `validate_as_destroyable’

–
Ramon T.