__init__() got an unexpected keyword argument 'user'

Question

i am using Django to create a user and an object when the user is created. But there is an error

__init__() got an unexpected keyword argument 'user'

when calling the register() function in view.py. The function is:

def register(request):       '''signup view'''          if request.method=="POST":           form=RegisterForm(request.POST)           if form.is_valid():               username=form.cleaned_data["username"]               email=form.cleaned_data["email"]               password=form.cleaned_data["password"]               user=User.objects.create_user(username, email, password)               user.save()             return HttpResponseRedirect('/keenhome/accounts/login/')         else:              form = RegisterForm()                   return render_to_response("polls/register.html", {'form':form}, context_instance=RequestContext(request))        #This is used for reinputting if failed to register         else:          form = RegisterForm()               return render_to_response("polls/register.html", {'form':form}, context_instance=RequestContext(request)) 

and the object class is:

class LivingRoom(models.Model):     '''Living Room object'''     user = models.OneToOneField(User)      def __init__(self, temp=65):         self.temp=temp      TURN_ON_OFF = (         ('ON', 'On'),         ('OFF', 'Off'),     )      TEMP = (         ('HIGH', 'High'),         ('MEDIUM', 'Medium'),         ('LOW', 'Low'),     )      on_off = models.CharField(max_length=2, choices=TURN_ON_OFF)     temp = models.CharField(max_length=2, choices=TEMP)  #signal function: if a user is created, add control livingroom to the user     def create_control_livingroom(sender, instance, created, **kwargs):     if created:         LivingRoom.objects.create(user=instance)  post_save.connect(create_control_livingroom, sender=User) 

The Django error page notifies the error information: user=User.objects.create_user(username, email, password) and LivingRoom.objects.create(user=instance)

I tried to search this problem, finding some cases, but still cannot figure out how to solve it.

Answer 1

You can't do

LivingRoom.objects.create(user=instance) 

because you have an __init__ method that does NOT take user as argument.

You need something like

#signal function: if a user is created, add control livingroom to the user     def create_control_livingroom(sender, instance, created, **kwargs):     if created:         my_room = LivingRoom()         my_room.user = instance 

Update

But, as bruno has already said it, Django's models.Model subclass's initializer is best left alone, or should accept *args and **kwargs matching the model's meta fields.

So, following better principles, you should probably have something like

class LivingRoom(models.Model):     '''Living Room object'''     user = models.OneToOneField(User)      def __init__(self, *args, temp=65, **kwargs):         self.temp = temp         return super().__init__(*args, **kwargs) 

Note - If you weren't using temp as a keyword argument, e.g. LivingRoom(65), then you'll have to start doing that. LivingRoom(user=instance, temp=66) or if you want the default (65), simply LivingRoom(user=instance) would do.

Answer 2

I got the same error.

On my view I was overriding get_form_kwargs() like this:

class UserAccountView(FormView):     form_class = UserAccountForm     success_url = '/'     template_name = 'user_account/user-account.html'  def get_form_kwargs(self):     kwargs = super(UserAccountView, self).get_form_kwargs()     kwargs.update({'user': self.request.user})     return kwargs 

But on my form I failed to override the init() method. Once I did it. Problem solved

class UserAccountForm(forms.Form):     first_name = forms.CharField(label='Your first name', max_length=30)     last_name = forms.CharField(label='Your last name', max_length=30)     email = forms.EmailField(max_length=75)      def __init__(self, *args, **kwargs):         user = kwargs.pop('user')         super(UserAccountForm, self).__init__(*args, **kwargs)