foodsoft/plugins/documents/app/models/document.rb

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class Document < ActiveRecord::Base
belongs_to :created_by, :class_name => 'User', :foreign_key => 'created_by_user_id'
validates_presence_of :data
def filename
types = MIME::Types[mime]
if name.include? '.'
types.each do |type|
type.extensions.each do |extension|
return name if name.end_with? ".#{extension}"
end
end
end
"#{name}.#{types.first.preferred_extension}"
end
end