fix: incorrect json formatting

Author: tractorcow

src/openapi_python_generator/language_converters/python/service_generator.py

@@ -40,7 +40,7 @@ def _generate_body_dump_expression(data = "data") -> str:
         return f"{data}.model_dump()"
 
     # rely on pydantic v2 to serialise (slowest, but best compatibility)
-    return f"{data}.model_dump_json()"
+    return f"{data}.model_dump(mode=\"json\")"
 
 
 def generate_body_param(operation: Operation) -> Union[str, None]:

src/openapi_python_generator/language_converters/python/templates/aiohttp.jinja2

@@ -25,9 +25,9 @@ async def {{ operation_id }}({{ params }} api_config_override : Optional[APIConf
             params=query_params,
     {% if body_param %}
         {% if use_orjson %}
-            data=orjson.dumps({{ body_param }})
+            data=orjson.dumps({{ body_param | safe }})
         {% else %}
-            json = {{ body_param }}
+            json = {{ body_param | safe}}
         {% endif %}
     {% endif %}
         ) as inital_response:

src/openapi_python_generator/language_converters/python/templates/httpx.jinja2

@@ -30,9 +30,9 @@ with httpx.Client(base_url=base_path, verify=api_config.verify) as client:
         params=query_params,
         {% if body_param %}
         {% if use_orjson %}
-        content=orjson.dumps({{ body_param }})
+        content=orjson.dumps({{ body_param | safe }})
         {% else %}
-        json = {{ body_param }}
+        json = {{ body_param | safe }}
         {% endif %}
         {% endif %}
     )

src/openapi_python_generator/language_converters/python/templates/requests.jinja2

@@ -25,9 +25,9 @@ def {{ operation_id }}({{ params }} api_config_override : Optional[APIConfig] =
         verify=api_config.verify,
         {% if body_param %}
         {% if use_orjson %}
-        content=orjson.dumps({{ body_param }})
+        content=orjson.dumps({{ body_param | safe }})
         {% else %}
-        json = {{ body_param }}
+        json = {{ body_param | safe }}
         {% endif %}
         {% endif %}
     )

tests/test_service_generator.py

@@ -88,14 +88,14 @@ def test_generate_body_param_pydanticv1(test_openapi_operation, expected_result,
                     }
                 )
             ),
-            "data.model_dump_json()",
+            "data.model_dump(mode=\"json\")",
         ),
         (
             Operation(
                 responses=default_responses,
                 requestBody=Reference(ref="#/components/schemas/TestModel")
             ),
-            "data.model_dump_json()",
+            "data.model_dump(mode=\"json\")",
         ),
         (
             Operation(
@@ -111,7 +111,7 @@ def test_generate_body_param_pydanticv1(test_openapi_operation, expected_result,
                     }
                 )
             ),
-            "[i.model_dump_json() for i in data]",
+            "[i.model_dump(mode=\"json\") for i in data]",
         ),
         (Operation(responses=default_responses, requestBody=None), None),
     ],