group by "project"

    def list(self, request, *args, **kwargs):

        project_id = self.request.query_params.get('project_id')

        if project_id:

            queryset = RegistrationDatesSlots.objects.values('date').annotate(project=Count('project')).filter(project=project_id)

            # queryset = RegistrationDatesSlots.objects.filter(project=project_id).query.group_by=['project']

        else:

            queryset = RegistrationDatesSlots.objects.all().values('project', 'date')

        serialized_data = []

        for item in queryset:

            serialized_item = {

                'date': item['date'],

                'project': item['project']

            }

            serialized_data.append(serialized_item)

        return Response(serialized_data)


this is my views i want to group by "project" but shows only one record,
i know there are multiple records there

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