TG215 Rest Dispatcher Questions

restcontroller_snippet.py

class RestDispatcher(ObjectDispatcher):
    ....
    ....

    def _check_for_sub_controllers(self, state, remainder):
        current_controller = state.controller
        method = None
        for find in ('get_one', 'get'):
            if hasattr(current_controller, find):
                method = find
                break
        if method is None:
            return
        args = self._get_argspec(getattr(current_controller, method))
        fixed_args = args[0][1:]
        fixed_arg_length = len(fixed_args)
        var_args = args[1]
        if var_args:
            for i, item in enumerate(remainder):
                if hasattr(current_controller, item) and self._is_controller(current_controller, item):
                    current_controller = getattr(current_controller, item)
                    state.add_routing_args(item, remainder[:i], fixed_args, var_args)
                    return self._dispatch_controller(item, current_controller, state, remainder[i+1:])
        elif fixed_arg_length< len(remainder) and hasattr(current_controller, remainder[fixed_arg_length]):
            item = remainder[fixed_arg_length]
            # wyzard: item is a method of the leaf controller, it seems we are checking whether
            # it exists as a method in the current_controller, however, it seems, the
            # current_controller is not necessarily the leaf controller.
            if hasattr(current_controller, item):
                if self._is_controller(current_controller, item):
                    state.add_routing_args(item, remainder, fixed_args, var_args)
                    return self._dispatch_controller(item, getattr(current_controller, item), state, remainder[fixed_arg_length+1:])
            else:
                # wyzard: if current_controller does not have method, i presume we
                # drill further down the url_path to locate the leaf controller
        else:
            # wyzard: implicit return None?