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Class: ActiveStorage::Transformers::ImageProcessingTransformer

Relationships & Source Files
Namespace Children
Exceptions:
UnsupportedImageProcessingArgument, UnsupportedImageProcessingMethod
Extension / Inclusion / Inheritance Descendants
Subclasses:
ImageMagick, Vips
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Transformer
Instance Chain:
self, Transformer
Inherits: ActiveStorage::Transformers::Transformer
Defined in: activestorage/lib/active_storage/transformers/image_processing_transformer.rb

Class Method Summary

Transformer - Inherited

.new

Instance Attribute Summary

Transformer - Inherited

#transformations

Instance Method Summary

Transformer - Inherited

#transform

Applies the transformations to the source image in file, producing a target image in the specified format.
#process

Returns an open Tempfile containing a transformed image in the given format.

Constructor Details

This class inherits a constructor from ActiveStorage::Transformers::Transformer

Instance Method Details

#operations

[ GitHub ] 

  


# File 'activestorage/lib/active_storage/transformers/image_processing_transformer.rb', line 28



def operations
  transformations.each_with_object([]) do |(name, argument), list|
    validate_transformation(name, argument)

    if argument.present?
      list << [ name, argument ]
    end
  end
end


  








  

    #process(file, format:)  
  

  [ GitHub ]


  

  


# File 'activestorage/lib/active_storage/transformers/image_processing_transformer.rb', line 19



def process(file, format:)
  processor.
    source(file).
    loader(page: 0).
    convert(format).
    apply(operations).
    call
end


  








  

    #validate_transformation(name, argument)  
  

  [ GitHub ]


  

  


# File 'activestorage/lib/active_storage/transformers/image_processing_transformer.rb', line 38



def validate_transformation(name, argument)
  if name.to_s == "combine_options"
    raise ArgumentError, <<~ERROR.squish
      Active Storage's ImageProcessing transformer doesn't support :combine_options,
      as it always generates a single command.
    ERROR
  end
end