gistfile1.rb

  def exists?(attribs)
    CustomImage.find_by_account_id_and_hash(attribs['account_id'], attribs['id'])
  end

  # Cleaner way of doing the exists? and return/if without making the query twice?
  # (the query can return nil so memoizing won't work)
  def some_method(attribs)
    img = exists?(attribs)
    return img if img
    ...
  end