method

variant

v7.0.0 - Show latest stable - Class: ActiveStorage::Attachment

variant(transformations)

public

Returns an ActiveStorage::Variant or ActiveStorage::VariantWithRecord instance for the attachment with the set of transformations provided. See ActiveStorage::Blob::Representable#variant for more information.

Raises an ArgumentError if transformations is a Symbol which is an unknown pre-defined variant of the attachment.

# File activestorage/app/models/active_storage/attachment.rb, line 56
  def variant(transformations)
    case transformations
    when Symbol
      variant_name = transformations
      transformations = variants.fetch(variant_name) do
        record_model_name = record.to_model.model_name.name
        raise ArgumentError, "Cannot find variant :#{variant_name} for #{record_model_name}##{name}"
      end
    end

    blob.variant(transformations)
  end

variant

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