René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"_get_kwargs does not produce correct payload when there are data and files present","articleBody":"**Describe the bug**\r\nWhen an API endpoint accepts data and files as a part of a multipart form data, the generated code puts the `data` fields (expected by `httpx`) into `files`, which leads to a `TypeError` in httpx when trying to encode the multipart form data.\r\n\r\n**To Reproduce**\r\nSteps to reproduce the behavior:\r\n1. Generate client\r\n2. Try to use the endpoint\r\n\r\n**Expected behavior**\r\nShould not encounter `TypeError` in `httpx`.  More specifically, the `_get_kwargs()` function of the module for the endpoint needs to return an additional field, `data`, in addition to `files` for the plain text fields.  That probably means `multipart_data.to_multipart()` should return both `data` and `files`.  Currently, it only returns `files`.\r\n\r\n**OpenAPI Spec File**\r\nThe openapi.yaml is private, but I can do my best to produce a snippet that would reproduce the error.  The actual endpoint shouldn't matter because the `TypeError` is encountered before sending any requests.\r\n\r\n```yaml\r\nopenapi: 3.0.1\r\ninfo:\r\n  title: Rest API\r\n  version: \"3\"\r\nservers:\r\n- url: /rest\r\nsecurity:\r\n- JwtAuth: []\r\n- ApiKeyAuth: []\r\npaths:\r\n  /api/projects/{projectId}/depositFile:\r\n    post:\r\n      tags:\r\n      - Deposit File\r\n      summary: Deposit a file.\r\n      operationId: depositFile\r\n      parameters:\r\n      - name: projectId\r\n        in: path\r\n        description: The ID of the project\r\n        required: true\r\n        schema:\r\n          type: string\r\n      requestBody:\r\n        content:\r\n          multipart/form-data:\r\n            schema:\r\n              $ref: '#/components/schemas/DepositFileDto'\r\n      responses:\r\n        \"201\":\r\n          description: The file is deposited successfully.\r\n          content:\r\n            application/json: {}\r\ncomponents:\r\n  schemas:\r\n    DepositFileDto:\r\n      required:\r\n      - code\r\n      - description\r\n      - mainFile\r\n      - parametersXmlFile\r\n      type: object\r\n      properties:\r\n        code:\r\n          maxLength: 255\r\n          minLength: 1\r\n          type: string\r\n          description: The code of the file\r\n        description:\r\n          maxLength: 4000\r\n          minLength: 1\r\n          type: string\r\n          description: The description of the file\r\n        mainFile:\r\n          type: string\r\n          description: The main file.\r\n          format: binary\r\n        versionComment:\r\n          type: string\r\n          nullable: true\r\n```\r\n\r\n**Desktop (please complete the following information):**\r\n - OS: Windows 10\r\n - Python Version: 3.9.4\r\n - openapi-python-client version: 0.10.4\r\n","author":{"url":"https://github.com/skuo1-ilmn","@type":"Person","name":"skuo1-ilmn"},"datePublished":"2021-10-04T17:42:15.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/508/openapi-python-client/issues/508"}