Problem with view

[Maurizio Faccin]

Hello,
I'am a newbie in usign django and django rest.
I have a problem with a modelsetview
The message error is:

Exception Type:	AttributeError
Exception Value:	type object 'Fatture' has no attribute 'objects'
Exception Location:	C:\Lavoro\Python\scambiosdi\scambiosdi\fatture\api\views.py, line 15, in get_queryset

This is the model.py:
from django.db import models
from scambiosdi import dataset
from utenti.models import Utenti

class Fatture(models.Model):
    utente = models.ForeignKey(Utenti, on_delete=models.CASCADE, related_name="fatture")
    tipo_fattura = models.IntegerField(choices=dataset.TIPOFATTURA)
    denominazione = models.CharField(max_length=80)
    numero = models.CharField(max_length=20)
    data = models.DateField()
    totale = models.DecimalField(max_digits=18, decimal_places=2, default=0)
    identificativo_sdi = models.CharField(max_length=50, blank=True)
    percorso_file_originale = models.CharField(max_length=240, blank=True)
    percorso_file_pulito = models.CharField(max_length=240, blank=True)

    class Meta():
        verbose_name = 'Fattura'
        verbose_name_plural = 'Fatture'

    def __str__(self):
        return '{} {} {}'.format(self.denominazione, self.numero, self.data)

This is the serializers.py:
from rest_framework import serializers
from fatture.models import Fatture

class FatturaSerializer(serializers.ModelSerializer):
    user = serializers.StringRelatedField(read_only=True)

    class Meta:
        model = Fatture
        fields = "__all__"

And this is the views.py:
from rest_framework.viewsets import ModelViewSet
from rest_framework.permissions import IsAuthenticated
from fatture.models import Fatture
from fatture.api.serializers import FatturaSerializer

class Fatture(ModelViewSet):
    serializer_class = FatturaSerializer
    permission_classes = [IsAuthenticated]

    def get_queryset(self):
        queryset = Fatture.objects.all()
        idfattura =  self.request.query_params.get("idfattura", None)
        if idfattura is not None:
            queryset = queryset.filter(id=idfattura)
        return queryset

If I change the Fatture class in this way works correctly:
class Fatture(ModelViewSet):
    queryset = Fatture.objects.all()
    serializer_class = FatturaSerializer
    permission_classes = [IsAuthenticated]


Maurizio

[Kasper Laudrup]

On 24/02/2021 21.00, Maurizio Faccin wrote:
>
> Hello,
> I'am a newbie in usign django and django rest.
> I have a problem with a modelsetview
> The message error is:
>
> Exception Type: AttributeError
> Exception Value:
>
> type object 'Fatture' has no attribute 'objects'
>

You have two classes called Fatture. In your models file and your views
file. The Python interpreter needs to figure out which one of them to use.

When you call the objects method on the Fatture class it is using the
class inheriting from models.Model but the tries to find the objects
attribute as a static member in the same class where you're making the call.

You could either make it explicit which class to use by prefixing the
call like *fattura.models.Fatture* but a better solution is probably to
rename the classes to FattureModel and FattureView. That would also
follow the naming patter from calling your serializer class
FatturaSerializer.

Kind regards,

Kasper Laudrup

[Umberto Moffa]

Ciao, prova a cambiare il nome delle classi, forse chiamandosi Fatture sia il Model che la View va in pappa, oppure sovrascrivi il nome del Model quando lo importi nella view

Esempio:

“from model. import Fatture as *qualsiasi altro nome*

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[Maurizio Faccin]

I changed the classes name and works!
Thank you


Maurizio

[Maurizio Faccin]

Ciao,
cambiando il nome delle classi funziona.

Grazie mille!


Maurizio

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[Umberto Moffa]

Di niente!

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