alias_chain_prepend

🌀 Replacing alias_method_chain with Module#prepend

Rails’ alias_method_chain is deprecated—use prepend for elegant method wrapping. You preserve super chains and avoid hidden aliases.

module CacheFetch
  def fetch(key)
    Rails.cache.read(key) || super
  end
end

class DataStore
  prepend CacheFetch

  def fetch(key)
    # expensive lookup...
    "value"
  end
end

DataStore.new.fetch(:foo) # attempts cache, then falls back

By using prepend, you keep the method chain intuitive and reversible.