[Fixed]-Userprofile does not exist user has no profile

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Solution to this problem.

The error occurs at this line

 wallet = Wallet.objects.get(pk=request.user.userprofile.wallet_id_id)

Clearly because the userprofile doesn’t exist for the user. This can be for two main reasons.

  1. the user is the anonymous user (not authenticated) you are not checking if the user is logged in
  2. the user account was created before you created the user profile.

check if the profile exists first

if not getattr(request.user,'userprofile'):
    # create user profile here

wallet = Wallet.objects.get(pk=request.user.userprofile.wallet_id_id)

The real solution

You have got your database design wrong. See this. 

wallet = Wallet(username=request.POST['username'], amount=0)

This implies that you are having a username field in your wallet model, but then

class Userprofile(models.Model):
    user = models.OneToOneField(User, unique=True, primary_key=True)
    wallet_id = models.ForeignKey(Wallet, on_delete=models.CASCADE)

You have a wallet as a foreign key to a UserProfile which leads to a cyclic relationship.

The correct design would be to remove the username field from your Wallet and replace it with a user field

class Wallet(models.Model):
    user = models.ForeignKey(User)
    ...

Then your user profile becomes

class Userprofile(models.Model):
    user = models.OneToOneField(User, unique=True, primary_key=True)
    date_ob = models.DateField(null=True, blank=True)
    sex = models.CharField(max_length=1, null=True)

    def __str__(self):
        return self.user
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