The key "(User_id) = (51)" already exists - django

Question

ERROR: repetitive record violates the singular constraint "user_otherinfo_user_id_key"
DETAIL: The key "(user_id) = (52)" already exists.
models.py
class OtherInfo(models.Model):
user = models.OneToOneField(User,on_delete=models.CASCADE)
phone = models.CharField(max_length=11,verbose_name="phone number")
location = models.CharField(max_length=50,verbose_name="location")
profile_image = models.FileField(blank = True,null = True,verbose_name="image")
class Meta:
verbose_name_plural = 'Other informations'
#receiver(post_save, sender=User)
def create_user_profile(sender, instance, created, **kwargs):
if created:
OtherInfo.objects.create(user=instance)
#receiver(post_save, sender=User)
def save_user_profile(sender, instance, **kwargs):
instance.otherinfo.save()
forms.py
class LoginForm(forms.Form):
username = forms.CharField(label = "Username")
password = forms.CharField(label = "Parola",widget = forms.PasswordInput)
class RegisterForm(forms.ModelForm):
password1 = forms.CharField(max_length=100, label='Parola',widget=forms.PasswordInput())
password2 = forms.CharField(max_length=100, label='Parola again', widget=forms.PasswordInput())
phone_number = forms.CharField(required=False, max_length=11, label='Phone Number')
location = forms.CharField(required=False, max_length=50, label='Location')
profile_image = forms.FileField(required=False, label="Image")
class Meta:
model = User
fields = [
'first_name',
'last_name',
'email',
'username',
'password1',
'password2',
'phone_number',
'location',
'profile_image',
]
def clean_password2(self):
password1 = self.cleaned_data.get("password1")
password2 = self.cleaned_data.get("password2")
if password1 and password2 and password1 != password2:
raise forms.ValidationError("Passwords do not match!")
return password2
class UserForm(forms.ModelForm):
class Meta:
model = User
fields = ('first_name', 'last_name', 'email')
class ProfileForm(forms.ModelForm):
class Meta:
model = OtherInfo
fields = ('phone', 'location', 'profile_image')
views.py
#login_required
#transaction.atomic
def updateprofile(request):
if request.method == 'POST':
user_form = UserForm(request.POST, instance=request.user)
profile_form = ProfileForm(request.POST, instance=request.user.otherinfo)
if user_form.is_valid() and profile_form.is_valid():
user_form.save()
profile_form.save()
messages.success(request, _('Your profile has been successfully updated!'))
return redirect('/user/profile/')
else:
messages.error(request, _('Please correct the following error.'))
else:
user_form = UserForm(instance=request.user)
profile_form = ProfileForm(instance=request.user.otherinfo)
return render(request, 'user/update_user.html', {
'user_form': user_form,
'profile_form': profile_form
})
def register(request):
form = RegisterForm(request.POST or None,request.FILES or None )
if form.is_valid():
user = form.save(commit=False)
first_name = form.cleaned_data.get('first_name')
last_name = form.cleaned_data.get('last_name')
username = form.cleaned_data.get("username")
email = form.cleaned_data.get('email')
password = form.cleaned_data.get('password1')
phone = form.cleaned_data.get('phone_number')
location = form.cleaned_data.get('location')
profile_image = form.cleaned_data.get('profile_image')
user.set_password(password)
user.save()
new_user = authenticate(username=user.username, first_name=first_name, last_name=last_name, email=email, password=password)
OtherInfo.objects.create(user=new_user,phone=phone,location=location,
profile_image=profile_image)
login(request,new_user)
messages.info(request,"Successfully Register ...")
return redirect("/")
context = {
"form" : form
}
return render(request,"user/register.html",context)
In Django, the user can register before updating the profile. When I add the profile update code, now the user is failing to register. How can I solve the problem?

Answer 1

It's simply a matter of not creating twice a OtherInfo for the same User:
in the post_save handler of saving a User, you create a OtherInfo object for the user.
in your view, you first create the User, hence you already create the OtherInfo associated with the user.
then you have OtherInfo.objects.create(user=new_user,phone=phone,location=location,
profile_image=profile_image)
This last instruction will fail, because you're trying to create a second OtherInfo for the same user. So you can do two things:
Remove the post_save signal handler that creates the OtherInfo object
or
Update new_user.otherinfo by setting the various values and saving it instead of creating it.

Answer 2

You need to delete the data entry with id=51.
The error you get is related to database, that the entry with id you are trying to create already exists.
Drop your database and create a new one(If you are not on a production environment)