Module: ActiveStorage::AsyncVariants::PreviewExtension

Defined in:
lib/active_storage/async_variants/preview_extension.rb

Instance Method Summary collapse

Instance Method Details

#async_state ⇒ Object 



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# File 'lib/active_storage/async_variants/preview_extension.rb', line 50

def async_state
  return nil unless async_preview?
  find_preview_variant_record&.state || "pending"
end

#enqueue! ⇒ Object 



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# File 'lib/active_storage/async_variants/preview_extension.rb', line 13

def enqueue!
  if result = find_named_async_variant
    attachment, variant_name, _ = result

    blob.variant_records.create!(
      variation_digest: variation.digest,
      state: "pending",
    )
    ActiveStorage::AsyncVariants::ProcessJob.perform_later(
      attachment.record, attachment.name, variant_name.to_s,
    )
  end
rescue ActiveRecord::RecordNotUnique
  # another caller (or a leftover record) wins; their job handles it
end

#key ⇒ Object 



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# File 'lib/active_storage/async_variants/preview_extension.rb', line 41

def key
  if async_preview?
    raise ActiveStorage::Preview::UnprocessedError unless preview_variant_processed?
    find_preview_variant_record.image.blob.key
  else
    super
  end
end

#processed ⇒ Object

Block vanilla ActiveStorage’s synchronous preview transform on async-backed services; rely on the auto-enqueue (AttachmentExtension) path – and the public #enqueue! – to dispatch ProcessJob.



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# File 'lib/active_storage/async_variants/preview_extension.rb', line 9

def processed
  async_preview? ? self : super
end

#processed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_storage/async_variants/preview_extension.rb', line 29

def processed?
  async_preview? ? preview_variant_processed? : super
end

#url ⇒ Object 



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# File 'lib/active_storage/async_variants/preview_extension.rb', line 33

def url(...)
  if async_preview?
    preview_variant_processed? ? find_preview_variant_record.image.url(...) : fallback_preview_url(...)
  else
    super
  end
end