fix: Put non-file fields as tuples in the files dict

Author: Constantinos Symeonides

end_to_end_tests/golden-record/my_test_api_client/api/tests/upload_file_tests_upload_post.py

@@ -24,22 +24,18 @@ def _get_kwargs(
         headers["keep-alive"] = keep_alive
 
     files = {}
-    data = {}
     for key, value in multipart_data.to_dict().items():
-        if is_file(value):
+        if is_file(value) or isinstance(value, str):
             files[key] = value
-        elif isinstance(value, str):
-            data[key] = value
         else:
-            data[key] = json.dumps(value)
+            files[key] = (None, json.dumps(value), "application/json")
 
     return {
         "url": url,
         "headers": headers,
         "cookies": cookies,
         "timeout": client.get_timeout(),
         "files": files,
-        "data": data,
     }
 
 

openapi_python_client/templates/endpoint_module.py.jinja

@@ -42,14 +42,11 @@ def _get_kwargs(
 
     {% if endpoint.multipart_body_class %}
     files = {}
-    data = {}
     for key, value in multipart_data.to_dict().items():
-         if is_file(value):
+         if is_file(value) or isinstance(value, str):
              files[key] = value
-         elif isinstance(value, str):
-             data[key] = value
          else:
-             data[key] = json.dumps(value)
+             files[key] = (None, json.dumps(value), "application/json")
     {% endif %}
 
     return {
@@ -61,7 +58,6 @@ def _get_kwargs(
         "data": asdict(form_data),
         {% elif endpoint.multipart_body_class %}
         "files": files,
-        "data": data,
         {% elif endpoint.json_body %}
         "json": {{ "json_" + endpoint.json_body.python_name }},
         {% endif %}