Destroying a Rails 3 object in rake?

Question

I\'m stuck on a simple issue here. I\'m building an application that manages a database of coupons, each of which has an expiration date. I\'m trying to build a rake task that

Answer 1

First off, to help debug things from rake, invoke it with the --trace option. Your issue here isn't rake specific though.

The Offer.where('expires_on < ?', today) is going to return a collection, and not a single instance of Offer and there isn't a destroy method available for the collection.

You can iterate over each expired offer and call destroy. Something like this:

@offers = Offer.where('expires_on < ?', today)
@offers.each { |offer| offer.destroy }

Answer 2

You're close. You just need to use the #destroy_all method instead of #destroy. The latter requires an id argument.

today = Date.today.to_s            
Offer.where('expires_on < ?', today).destroy_all