Models as choices

[shreehari Vaasistha L]

how can i use model x values as choices for model y ?

for eg:

class countries(models.Model):
 country = models.CharField(max_length=200)

 def __str__(self):
 return self.country

class User(AbstractUser):
 """User model."""

 username = None
 full_name = models.CharField(_("Full Name"), max_length=50, default="Full Name")
 country_choices = models.CharField(choices=countries

[Antje Kazimiers]

with a Foreign Key field, one-to-many relationship:

https://docs.djangoproject.com/en/3.0/topics/db/examples/many_to_one/

Antje

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[shreehari Vaasistha L]

Object of type ValueError is not JSON serializable

getting this above error.

here's my views.py

class UserCreateApiView(CreateAPIView):

   serializer_class = UserCreateSerializer

   def post(self,request):

       try:

           serializer=UserCreateSerializer(data=request.data)

           if serializer.is_valid():

               new_user = User()

                new_user.highest_degree=serializer.data['highest_degree']

               #new_user.state_registered=serializer.data['state_registered']

               new_user.country_choices=serializer.data['country_choices']

                new_user.save()

               print(new_user.doc_id)

               return Response(status=status.HTTP_200_OK)

           return Response(status=status.HTTP_406_NOT_ACCEPTABLE)

       except Exception as e:

           return Response(e)

have mentioned all fields in serializers.py

On Thursday, April 16, 2020 at 12:57:16 PM UTC+5:30, Antje Kazimiers wrote:

with a Foreign Key field, one-to-many relationship:

https://docs.djangoproject.com/en/3.0/topics/db/examples/many_to_one/

Antje

On 4/16/20 6:52 AM, shreehari Vaasistha L wrote:

how can i use model x values as choices for model y ?

for eg:

class countries(models.Model):
 country = models.CharField(max_length=200)

 def __str__(self):
 return self.country

class User(AbstractUser):
 """User model."""

 username = None
 full_name = models.CharField(_("Full Name"), max_length=50, default="Full Name")
 country_choices = models.CharField(choices=countries

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[Kasper Laudrup]

Hi Shreehari

On 16/04/2020 10.17, shreehari Vaasistha L wrote:
> Object of type ValueError is not JSON serializable
>
>
> getting this above error
>

First of all, don't highjack other unrelated threads. Create your own
with a descriptive subject.

You get the error because of the lines:

except Exception as e:
return Response(e)

You cannot serialize the exception object, but your real problem is most
likely the actual exception being thrown.

Try to remove the entire try/except block. You most likely don't want to
return errors in your code to the user anyway so returning an HTTP 500
to the user and letting Django write the exception message and
stacktrace in your log is probably much better.

Kind regards,

Kasper Laudrup

[shreehari Vaasistha L]

Thanks for helping me out .

[Gavin Wiener]

Couldn't the User just have a ForeignKey on countries?

[shreehari Vaasistha L]

i get this error when trying in your way:

Cannot assign "2": "User.highest_degree" must be a "Degree" instance.

[Gavin Wiener]

If you're serializing as JSON, that primary key is literally just integer then, and the foreign key relationship requires an instance of that foreign key. So you'll need to fetch an instance of the object first.

I've had this issue before, that's how I resolved it.

[Denilson Antonio Avellan]

me pueden enviar el codigo completo ? para hacer un login solo la interfqaz grafica sin nada de conexion a base de datos porfavor!

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[Esther Camilo]

This guy has plenty of tutorials building complete applications. As front-end you can use Bootstrap in your templates

https://simpleisbetterthancomplex.com/

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