module Semian::Rails::ClassMethods

want the Active Record error, but rather the original cause.
cause if applicable. When we have a CircuitOpenErorr we don't
Translate ConnectionNotEstablished errors to their original

def new_client(config)
  super
rescue ActiveRecord::ConnectionNotEstablished => e
  if e.cause.is_a?(Mysql2::CircuitOpenError)
    raise e.cause
  else
    raise
  end
end