strong_parameters.py 文件源码

def require(self, *args):
        data = self.permit(*args)
        for arg in args:
            if type(arg) == str:
                if arg not in data:
                    raise web.HTTPBadRequest()
            elif type(arg) == Or:
                found = False
                for item in arg:
                    if item in data:
                        found = True
                        break
                if not found:
                    raise web.HTTPBadRequest()
        return data