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问题:
Given that the whole point of object.get_or_create() is to get the object if it already exists, I fail to see why it's throwing an integrity error for this code:
class UserAdd(TemplateView): def post(self, request, *args, **kwargs): context = self.get_context_data(*args, **kwargs) form = UserAddForm(request.POST) if form.is_valid(): first_name = form.cleaned_data['first_name'] last_name = form.cleaned_data['last_name'] myemail = form.cleaned_data['email'] mypass = form.cleaned_data['password'] if myemail and mypass: myuser,created = User.objects.get_or_create(email=myemail, username=myemail, first_name=first_name, last_name=last_name) if created: myuser.set_password(mypass) return HttpResponseRedirect('/')
Here is the error:
django.db.utils.IntegrityError IntegrityError: (1062, "Duplicate entry 'user@domain.com' for key 'username_UNIQUE'")
Anyone know what's going on?
回答1:
The parameters sent into the get_or_create method need to match exactly, or django's ORM would try to create a new object, and since a primary key/unique column constraint would be violated, you are getting the error.
Try this:
if form.is_valid(): first_name = form.cleaned_data['first_name'] last_name = form.cleaned_data['last_name'] myemail = form.cleaned_data['email'] mypass = form.cleaned_data['password'] if myemail and mypass: myuser,created = User.objects.get_or_create(email=myemail, defaults = {'username': myemail, 'first_name': first_name, 'last_name': last_name}) if created: myuser.set_password(mypass) return HttpResponseRedirect('/')
Read more on get_or_create here. The defaults= argument is what you needed.
回答2:
You are asking django to fetch a record based on four conditions:
- email
- username
- first_name
- last_name
So all four fields combined does not have a record.
You should do:
myuser, created = User.objects.get_or_create( username=myemail, defaults={'first_name': first_name, 'last_name': last_name, 'email': myemail})
