Django two model inheritance one model?

Question

Given the following code:(don't mind the Fields there're just for illustration)

Models

class UserModel(AbstractBaseUser, PermissionsMixin):
email = models.EmailField(unique=True)
Fields

class CommonInfo(models.Model):
delete = models.BooleanField(default=False)
Fields

class MyModel(CommonInfo, UserModel):
my_name = models.CharField(max_length=50, blank=False, null=False)
Fields

Serializer

class MySerializer(views.APIView):

class Meta:
    model = MyModel
    fields = '__all__'

Views

class MyViewSet(viewsets.ModelViewSet):
queryset = MyModel.objects.all()
serializer_class = MySerializer

URLs

router.register(r'studio', MyViewSet, basename='studio')

This upside model, Serializer & Views use. I use in Django REST Framework. but when I call MyModel they give me an error.

Return the following error when API call:

init() takes 1 positional argument but 2 were given

Error stack

Internal Server Error: /studio/
Traceback (most recent call last):
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/rest_framework/viewsets.py", line 125, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/rest_framework/views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/rest_framework/views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
    raise exc
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/rest_framework/mixins.py", line 45, in list
    serializer = self.get_serializer(queryset, many=True)
  File "/home/chetan/Workspace/PhotoLab/PhotoLab/venv/lib/python3.8/site-packages/rest_framework/generics.py", line 110, in get_serializer
    return serializer_class(*args, **kwargs)
TypeError: __init__() takes 1 positional argument but 2 were given
[21/Mar/2021 13:15:33] "GET /studio/ HTTP/1.1" 500 99610

can you provide the error stack trace, to see what's causing it? — Radwan Abu-Odeh
– Radwan Abu-Odeh, Commented Mar 21, 2021 at 13:08
@RadwanAbu-Odeh update error stack please check. Thanks in advance. happy coding. — chetan
– chetan, Commented Mar 21, 2021 at 13:19
I think the problem is that you are inheriting APIview for a serializer. — Marat Mkhitaryan
– Marat Mkhitaryan, Commented Mar 21, 2021 at 13:33
@MaratMkhitaryan can you give me suggestions on what can be changed. — chetan
– chetan, Commented Mar 21, 2021 at 13:37
Your model based serializer can inherit from serializers.ModelSerializer. Look at the DRF documentation for serializers. — Roman Mkrtchian
– Roman Mkrtchian, Commented Mar 21, 2021 at 14:17

Radwan Abu-Odeh · Accepted Answer · 2021-03-21 14:22:10Z

1

You are inheriting from APIView for you MySerializer class.

to fix that, inherit from ModelSerializer from Django rest framework serializers

from rest_framework import serializers

class MySerializer(serializers.ModelSerializer):
    class Meta:
        model = MyModel
        fields = '__all__'

and everything should be resolved.

answered Mar 21, 2021 at 14:22

Radwan Abu-Odeh

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1 Comment

chetan Over a year ago

Thank you @Radwan Abu-Odeh Happy Coding.

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