def _place_ship(self, game, user, ship_type, start_position, end_position):
try:
ship = Ship(parent=game.key)
ship.place_ship(game, user, ship_type,
start_position, end_position)
ship.put()
game.put()
except ValueError as e:
raise endpoints.BadRequestException(e)
return game.to_form('Ship placed!')
