If an API endpoint returns None, don't emit a return statement

In particular, for server responses such as 204 No Content, json()
must not be called because it would fail.

Author: heck-gd

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

@@ -24,6 +24,7 @@ async def {{ operation_id }}({{ params }}) -> {% if return_type.type is none or
                 raise HTTPException(inital_response.status, f'{{ operationId }} failed with status code: {inital_response.status}')
             response = await inital_response.json()
 
+{% if return_type.type is not none and return_type.type.converted_type is not none %}
 {% if return_type.complex_type %}
 {% if return_type.list_type is none %}
             return {{ return_type.type.converted_type }}(**response.json()) if response.json() is not None else {{ return_type.type.converted_type }}()
@@ -33,3 +34,4 @@ async def {{ operation_id }}({{ params }}) -> {% if return_type.type is none or
 {% else %}
             return response.json()
 {% endif %}
+{% endif %}

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

@@ -36,6 +36,7 @@ with httpx.Client(base_url=base_path, verify=APIConfig.verify) as client:
 
     if response.status_code != {{ return_type.status_code }}:
         raise HTTPException(response.status_code, f'{{ operationId }} failed with status code: {response.status_code}')
+{% if return_type.type is not none and return_type.type.converted_type is not none %}
 {% if return_type.complex_type %}
 {% if return_type.list_type is none %}
     return {{ return_type.type.converted_type }}(**response.json()) if response.json() is not None else {{ return_type.type.converted_type }}()
@@ -45,3 +46,4 @@ with httpx.Client(base_url=base_path, verify=APIConfig.verify) as client:
 {% else %}
     return response.json()
 {% endif %}
+{% endif %}

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

@@ -30,6 +30,7 @@ def {{ operation_id }}({{ params }}) -> {% if return_type.type is none or return
     )
     if response.status_code != {{ return_type.status_code }}:
         raise HTTPException(response.status_code, f'{{ operationId }} failed with status code: {response.status_code}')
+{% if return_type.type is not none and return_type.type.converted_type is not none %}
 {% if return_type.complex_type %}
 {% if return_type.list_type is none %}
     return {{ return_type.type.converted_type }}(**response.json()) if response.json() is not None else {{ return_type.type.converted_type }}()
@@ -39,3 +40,4 @@ def {{ operation_id }}({{ params }}) -> {% if return_type.type is none or return
 {% else %}
     return response.json()
 {% endif %}
+{% endif %}