#gem 'rails', '3.0.9'
#gem "paperclip", "~> 2.0"
rails console
>contract = Contract.first
=> #<Contract id: 1, . . .
>files = contract.contract_files
=> [#<ContractFile id: 1, contract_id: 1, . . .
>files.first.data.url
=> "/system/data/1/original/logo.png?1325513082"
> files.map(&:data_file_name).each do |key| key end
=> ["logo.png", "newyearseve-2011-res.jpg", nil]
#IT WORKS FINE!
> files.map(&:data.url).each do |key| key end
=> NoMethodError: undefined method `url' for :data:Symbol
#IT DOESN'T WORK
Can you explain how to get access to "data.url" in has_many model?
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