def create_constant_rules(phase_order=DEFAULT_PHASE_ORDER,
card_types=DEFAULT_CARD_TYPES):
'''
Creates a set of constant rules.
'''
if Rules.objects(_is_constant=True): #@UndefinedVariable
raise DominionException(
'''Constant rules configuration document already exists
, please check your actions again''')
else:
rules = Rules(phase_order=phase_order,
card_types=card_types,
_is_constant=True)
return rules
