create userprofile

[Terkea]

I'm using django-rest-auth to handle login and registration. The problem that I stumbled upon is that I'd like to add some custom fields to the default django User model. I've seen you are covering that on the docs and I've tried replicating their example from here, but when I am making a PUT request for the newly created field from the userprofile I get this error:

RelatedObjectDoesNotExist at /rest-auth/user/
User has no userprofile.
Request Method:	PUT
Request URL:	http://localhost:8000/rest-auth/user/
Django Version:	2.2.10
Exception Type:	RelatedObjectDoesNotExist
Exception Value:	
User has no userprofile.
Exception Location:	/home/terkea/django_react_template/src/venv/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py in __get__, line 415
Python Executable:	/home/terkea/django_react_template/src/venv/bin/python
Python Version:	3.6.9
Python Path:	
['/home/terkea/django_react_template/src',
 '/usr/lib/python36.zip',
 '/usr/lib/python3.6',
 '/usr/lib/python3.6/lib-dynload',
 '/home/terkea/django_react_template/src/venv/lib/python3.6/site-packages']
Server time:	Fri, 10 Apr 2020 14:56:41 +0000

This is my model

from django.db import models
from django.conf import settings
from django.contrib.auth.models import User

class UserProfile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    company_name = models.CharField(max_length=100, default=None)

and here's my serializer:

from rest_framework import serializers
from rest_auth.serializers import UserDetailsSerializer


class UserSerializer(UserDetailsSerializer):

    company_name = serializers.CharField(source="userprofile.company_name")

    class Meta(UserDetailsSerializer.Meta):
        fields = UserDetailsSerializer.Meta.fields + ('company_name',)

    def update(self, instance, validated_data):
        profile_data = validated_data.pop('userprofile', {})
        company_name = profile_data.get('company_name')

        instance = super(UserSerializer, self).update(instance, validated_data)

        # get and update user profile
        profile = instance.userprofile
        if profile_data and company_name:
            profile.company_name = company_name
            profile.save()
        return instance

I am assuming that the userprofile entry has to be created at the same time when the user is, but I don't know how exactly should I do it.

[Terkea]

from django.db import models
from django.conf import settings
from django.contrib.auth.models import User

from django.db.models.signals import post_save
from django.dispatch import receiver

class UserProfile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    company_name = models.CharField(max_length=100, default=None)

@receiver(post_save, sender=User)
def create_profile_for_user(sender, instance=None, created=False, **kwargs):
    if created:
        UserProfile.objects.get_or_create(user=instance)

this solved my problem