Active Storage Transformers Transformer

A Transformer applies a set of transformations to an image.

The following concrete subclasses are included in Active Storage:

Methods

Attributes

[R] transformations

Class Public methods

new(transformations)

📝 Source code 
# File activestorage/lib/active_storage/transformers/transformer.rb, line 16
      def initialize(transformations)
        @transformations = transformations
      end
🔎 See on GitHub

Instance Public methods

transform(file, format:)

Applies the transformations to the source image in file, producing a target image in the specified format. Yields an open Tempfile containing the target image. Closes and unlinks the output tempfile after yielding to the given block. Returns the result of the block.

📝 Source code 
# File activestorage/lib/active_storage/transformers/transformer.rb, line 23
      def transform(file, format:)
        output = process(file, format: format)

        begin
          yield output
        ensure
          output.close!
        end
      end
🔎 See on GitHub

Instance Private methods

process(file, format:)

Returns an open Tempfile containing a transformed image in the given format. All subclasses implement this method.

📝 Source code 
# File activestorage/lib/active_storage/transformers/transformer.rb, line 36
        def process(file, format:) # :doc:
          raise NotImplementedError
        end
🔎 See on GitHub