Can't you just use
workitem = serializers.PrimaryKeyRelatedField(
queryset=WorkItem.objects.all())
instead of workitem_id?
On Sat, Dec 16, 2023 at 10:00 AM Larry Martell <larry.mart...@gmail.com>
wrote:
> I have a DRF API. It is throwing an error that I have not been able to fix.
>
> Here is my view and serializer:
>
> class CreateNotations(CreateAPIView):
> permission_classes = [IsAuthenticated]
> serializer_class = NotationListSerializer
>
> def post(self, request, *args, **kwargs):
> return super().post(request, *args, **kwargs)
>
> class NotationListSerializer(serializers.Serializer):
> workitem_id =
> serializers.PrimaryKeyRelatedField(queryset=WorkItem.objects.all(),
> source="workitem")
> notations = NotationSerializer(many=True)
>
> def create(self, validated_data):
> workitem = validated_data["workitem"]
>
> IncompleteAnalysis.objects.filter(workitem=workitem).delete()
>
> data = []
> for notation in validated_data["notations"]:
> data.append({
> 'workitem': workitem,
> 'incomplete_analysis_reason': notation["reason"],
> 'vessel_affected': notation["vessel"],
> 'user': self.context['request'].user,
> 'timestamp': datetime.now().isoformat()
> })
>
> return
> IncompleteAnalysis.objects.bulk_create([IncompleteAnalysis(**d) for d in
> data])
>
> The body of the request received is:
>
> {'workitem_id': 244, 'notations': [{'reason_id": 4, 'vessel_id': 6}]}
>
> It fails with this:
>
> AttributeError: Got AttributeError when attempting to get a value for
> field `workitem_id` on serializer `NotationListSerializer`.
> The serializer field might be named incorrectly and not match any
> attribute or key on the `list` instance.
> Original exception text was: 'list' object has no attribute 'workitem'.
>
> Here is the stack trace:
>
> ERROR django.request:log.py:241 Internal Server Error: /api/notations/
> Traceback (most recent call last):
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/fields.py",
> line 446, in get_attribute
> return get_attribute(instance, self.source_attrs)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/fields.py",
> line 96, in get_attribute
> instance = getattr(instance, attr)
> AttributeError: 'list' object has no attribute 'workitem'
>
> During handling of the above exception, another exception occurred:
>
> Traceback (most recent call last):
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/django/core/handlers/exception.py",
> line 56, in inner
> response = get_response(request)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/django/core/handlers/base.py",
> line 197, in _get_response
> response = wrapped_callback(request, *callback_args, **callback_kwargs)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/django/views/decorators/csrf.py",
> line 55, in wrapped_view
> return view_func(*args, **kwargs)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/django/views/generic/base.py",
> line 103, in view
> return self.dispatch(request, *args, **kwargs)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/views.py",
> line 509, in dispatch
> response = self.handle_exception(exc)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/views.py",
> line 469, in handle_exception
> self.raise_uncaught_exception(exc)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/views.py",
> line 480, in raise_uncaught_exception
> raise exc
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/views.py",
> line 506, in dispatch
> response = handler(request, *args, **kwargs)
> File "/inst/martell/EVServer/app/CAPgraph/createevapi/views.py", line
> 1270, in post
> return super().post(request, *args, **kwargs)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/generics.py",
> line 190, in post
> return self.create(request, *args, **kwargs)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/mixins.py",
> line 20, in create
> headers = self.get_success_headers(serializer.data)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/serializers.py",
> line 555, in data
> ret = super().data
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/serializers.py",
> line 253, in data
> self._data = self.to_representation(self.instance)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/serializers.py",
> line 509, in to_representation
> attribute = field.get_attribute(instance)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/relations.py",
> line 190, in get_attribute
> return super().get_attribute(instance)
> File
> "/home/larrymartell/.local/lib/python3.8/site-packages/rest_framework/fields.py",
> line 479, in get_attribute
> raise type(exc)(msg)
> AttributeError: Got AttributeError when attempting to get a value for
> field `workitem_id` on serializer `NotationListSerializer`.
> The serializer field might be named incorrectly and not match any
> attribute or key on the `list` instance.
> Original exception text was: 'list' object has no attribute 'workitem'.
>
> This is vexing as I have other very similar APIs that work fine.
>
> Thanks!
> Larry
>
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