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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Optional enum fields are generated with the wrong type","articleBody":"**Describe the bug**\r\nAn endpoint which takes a body which has enum fields is being incorrectly generated with the type `Union[Unset, None]`. Of not here is that the enum itself is correctly generated in its own file, but are not used (or even imported) in the model for the wrapping type.\r\n\r\n**To Reproduce**\r\nThis is a minimal specification I came up with, which reproduces the problem:\r\n\r\nWe generate the client using simply `openapi-python-client generate` and the specification below, with no additional configuration.\r\n\r\nThe result of this is\r\n```Python\r\n@attr.s(auto_attribs=True)\r\nclass EnumWrapper:\r\n    \"\"\"  \"\"\"\r\n\r\n    myenum: Union[Unset, None] = UNSET\r\n    additional_properties: Dict[str, Any] = attr.ib(init=False, factory=dict)\r\n\r\n    def to_dict(self) -\u003e Dict[str, Any]:\r\n        myenum = None\r\n\r\n        field_dict: Dict[str, Any] = {}\r\n        field_dict.update(self.additional_properties)\r\n        field_dict.update({})\r\n        if myenum is not UNSET:\r\n            field_dict[\"myenum\"] = myenum\r\n\r\n        return field_dict\r\n\r\n    @staticmethod\r\n    def from_dict(src_dict: Dict[str, Any]) -\u003e \"EnumWrapper\":\r\n        d = src_dict.copy()\r\n        myenum = None\r\n\r\n        enum_wrapper = EnumWrapper(\r\n            myenum=myenum,\r\n        )\r\n\r\n        enum_wrapper.additional_properties = d\r\n        return enum_wrapper\r\n\r\n   # Rest of the file omitted for brevity\r\n```\r\n**Expected behavior**\r\nWe only just upgraded to the version which uses `Unset`, so I am not quite sure what exactly the type should be, but I assume something along the lines of either `Optional[MyEnum]`, `Union[MyEnum, Unset]` or `Union[Optional[MyEnum], Unset]`\r\n\r\n**OpenAPI Spec File**\r\n```yaml\r\nopenapi: 3.0.2\r\ninfo:\r\n  title: bar\r\n  version: unknown\r\npaths:\r\n  /foo:\r\n    post:\r\n      requestBody:\r\n        content:\r\n          application/json:\r\n            schema:\r\n              $ref: '#/components/schemas/EnumWrapper'\r\n        required: true\r\n      responses:\r\n        '204':\r\n          description: Successful Response\r\ncomponents:\r\n  schemas:\r\n    MyEnum:\r\n      title: MyEnum\r\n      enum:\r\n        - TypeA\r\n        - TypeB\r\n      type: string\r\n      description: An enumeration.\r\n    EnumWrapper:\r\n      title: EnumWrapper\r\n      type: object\r\n      properties:\r\n        myenum:\r\n          allOf:\r\n            - $ref: '#/components/schemas/MyEnum'\r\n\r\n```\r\n\r\n**Desktop (please complete the following information):**\r\n - OS: [Ubuntu 20.04]\r\n - Python Version: 3.7.9\r\n - openapi-python-client version: 0.7.3","author":{"url":"https://github.com/frjonsen","@type":"Person","name":"frjonsen"},"datePublished":"2021-01-22T13:36:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/311/openapi-python-client/issues/311"}