On Mon, Jan 2, 2012 at 10:02 PM, Nikolay <[email protected]> wrote:
> #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?
Hmm.. to my knowledge, & (unary operator) is converting to_proc on an
object.
so file.map(&:data_file_name) is equal to:
file.map {|i| i.data_file_name)
but on your second example
files.map(&:data.url) , ruby interpret it as call 'url' method on symbol
:data and call to_proc
hmm. I dont know the solution, but you might try
files.map do |file|
file.data.url
end
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