null relationship in POST causes exception

[tanj]

performing a POST with a null relationship causes a server error

What I expect to happen

I expect posting a null relationship to set that relationship on the model to None

What happened instead

Server responded with a 500 error because of an uncaught exception.

Work around

Remove comment relationship from relationships before POST

Failing POST data

{
    "data": {
        "attributes": {
            "sInspector": "AM"
        },
        "type": "tTestsheet",
        "relationships": {
            "job": {
                "data": {
                    "id": "111",
                    "type": "tJob"
                }
            },
            "comment": {
                "data": null
            },
            "testsheet_type": {
                "data": {
                    "id": "5",
                    "type": "tTestsheetType"
                }
            }
        }
    }
}

Exception traceback

Traceback (most recent call last):
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask\app.py", line 2088, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask\app.py", line 2073, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_cors\extension.py", line 165, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask\app.py", line 2070, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask\app.py", line 1515, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_cors\extension.py", line 165, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask\app.py", line 1513, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask\app.py", line 1499, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\views\base.py", line 408, in new_func
    data, status_code, headers = func(*args, **kw)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\views\base.py", line 400, in new_func
    return func(*args, **kw)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\views\base.py", line 354, in new_func
    return func(*args, **kw)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\views\base.py", line 240, in new_func
    return func(*args, **kw)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask\views.py", line 83, in view
    return self.dispatch_request(*args, **kwargs)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\views\base.py", line 1304, in dispatch_request
    return super().dispatch_request(*args, **kwargs)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask\views.py", line 157, in dispatch_request
    return meth(*args, **kwargs)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\views\base.py", line 443, in wrapped
    return func(*args, **kw)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\views\resources.py", line 299, in post
    instance = self.deserializer.deserialize(data)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\serialization.py", line 588, in deserialize
    links[link_name] = deserializer.deserialize(linkage)
  File "C:\Users\USERNAME\AppData\Local\pypoetry\Cache\virtualenvs\pce-testsheets-g8TS-oaq-py3.8\Lib\site-packages\flask_restless\serialization.py", line 660, in deserialize
    if 'id' not in data:
TypeError: argument of type 'NoneType' is not iterable

[mrevutskyi]

Thank you for the detailed report Fixed in v2.2.7