Class: SexyValidations::Validators::File

Inherits:
Object
  • Object
show all
Defined in:
lib/sexy_validations/validators/file.rb

Class Method Summary collapse

Class Method Details

.file_from_value(value) ⇒ Object 



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# File 'lib/sexy_validations/validators/file.rb', line 12

def self.file_from_value(value)
  case value.class.name
    when "File", "Tempfile"
      value
    when "Sequel::Plugins::Paperclip::Attachment"
      value.queued_file
    else
      raise ArgumentError, "#{value} is not a valid input"
  end
end

.humanized_size(num) ⇒ Object 



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# File 'lib/sexy_validations/validators/file.rb', line 5

def self.humanized_size(num)
  for x in ['Byte','KB','MB','GB','TB']
    return "%d %s"%[num, x] if num < 1024.0
    num /= 1024.0
  end
end

.validate(model, attribute, value, options) ⇒ Object 



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# File 'lib/sexy_validations/validators/file.rb', line 23

def self.validate(model, attribute, value, options)
  return unless value

  unless options.is_a?(Hash)
    options = {
      :size => options,
    }
  end

  file = file_from_value(value)
  return unless file

  if options[:size]
    min = options[:size].min
    if file.size < min
      model.errors.add(attribute, "zu klein (mindestes #{humanized_size(min)})")
    end

    max = options[:size].max
    if file.size > max
      model.errors.add(attribute, "zu groß (maximal #{humanized_size(max)})")
    end
  end

end