forked from loafle/openapi-generator-original
* I feel the issue is due to the creation of self._var_name_to_model_instances while doing the deserialization of the data. Earlier the Python SDK code was using get_var_name_to_model_instances function which was adding var name to model instances that contain it. So <class 'openapi_client.model.stream_options_all_of'> will not part of mapping in self._var_name_to_model_instances for variable name stream_options. Now with the latest Python SDK code following is the way through which var_name_to_model_instances is created: for prop_name in model_args: if prop_name not in discarded_args: var_name_to_model_instances[prop_name] = [self] + composed_instances Now as we can see that the var_name_to_model_instances is populated with self and composed_instance which will also contain stream_options_all_of as a composed instance and there will be no check that if stream_options is present in composed_instances or not. As there is no attribute_mapping found for stream_options in stream_options_all_of, the type for stream_options will be treated as dict for mapping stream_options_all_of as mentioned by @Chekov2k. So what I suggest is the following code: for prop_name in model_args: if prop_name not in discarded_args: var_name_to_model_instances[prop_name] = [self] + list( filter( lambda x: prop_name in x.openapi_types, composed_instances)) This way we can check if the property name is present in that composed instance or not. If it's okay for @spacether I can raise a PR for this. * [get_item_all_of_bug] Added samples, test cases to validate all_of schema. * [getiem_all_of_bug] Updated docs and samples. * [getiem_all_of_bug] Updated test cases, docs and samples.