Module: CarrierWave::Uploader::Processing::ClassMethods

Defined in:
lib/carrierwave/uploader/processing.rb

Instance Method Summary collapse

Instance Method Details

#process(*args) ⇒ Object

Adds a processor callback which applies operations as a file is uploaded. The argument may be the name of any method of the uploader, expressed as a symbol, or a list of such methods, or a hash where the key is a method and the value is an array of arguments to call the method with

Parameters

args (*Symbol, Hash=> Array[])

Examples

class MyUploader < CarrierWave::Uploader::Base

  process :sepiatone, :vignette
  process :scale => [200, 200]
  process :scale => [200, 200], :if => :image?
  process :sepiatone, :if => :image?

  def sepiatone
    ...
  end

  def vignette
    ...
  end

  def scale(height, width)
    ...
  end

  def image?
    ...
  end

end



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# File 'lib/carrierwave/uploader/processing.rb', line 56

def process(*args)
  if !args.first.is_a?(Hash) && args.last.is_a?(Hash)
    conditions = args.pop
    args.map!{ |arg| {arg => []}.merge(conditions) }
  end

  args.each do |arg|
    if arg.is_a?(Hash)
      condition = arg.delete(:if)
      arg.each do |method, args|
        self.processors += [[method, args, condition]]
      end
    else
      self.processors += [[arg, [], nil]]
    end
  end
end