Python NDB: Property validation in queries? -
i have model: def category_path_validator(prop , val): # makes sure path of form `first.second(...)last` # , represents valid path in category tree. pass class product(ndb.model): category_path = nsb.stringproperty(validator=category_path_validator) i want able products within category query is: product.query(ndb.and(product.category_path >= 'furniture' , product.category_path <= 'furniturez')) (adding z works since <=,>= compares strings lexicography ) now produces error because furniturez not valid category. is there way query value without validation , still able set property with validation ? i think best way split validation 2 parts. first part simplify validator check stringproperty : def category_path_validator(prop , val): # makes sure path of form `first.second(...)last` pass the second part add model hook : def _pre_put_hook(self): # makes sure category_path represents valid path
