I keep getting this error in Django, its called “local variable referenced before assignment”

Question

I am making this to-do list website with Django, but I keep getting this error in my "create" function in views.py file. here's the code:

def create(response):
    if response.method == "POST":
        form = CreateNewList(response.POST)

        if form.is_valid():
            n = form.cleaned_data["name"]
            t = ToDoList(name=n)
            t.save()

        return HttpResponseRedirect("/%i" %t.id)

here's the error:

local variable 't' referenced before assignment

the class of the form is:

from django import forms


class CreateNewList(forms.Form):
    name = forms.CharField(label="name", max_length=200)
    check = forms.BooleanField()

the models are:

from django.db import models


class ToDoList(models.Model):
    name = models.CharField(max_length=200)

    def __str__(self):
        return self.name


class Item(models.Model):
    todolist = models.ForeignKey(ToDoList, on_delete=models.CASCADE)
    text = models.CharField(max_length=300)
    complete = models.BooleanField()

    def __str__(self):
        return self.text

I tried assigning the variable before the if statement. here's the code:

def create(response):
    if response.method == "POST":
        form = CreateNewList(response.POST)
        t = ToDoList.objects
        if form.is_valid():
            n = form.cleaned_data["name"]
            t.create(name=n)
            t.save()

        return HttpResponseRedirect("/%i" %t.id)

    else:
        form = CreateNewList()

    return render(response, "main/create.html", {"form":form})

Answer 1

If you want to create t object, you need to do it like:

...
t = ToDoList.objects.create(name=n)
t.save()

Answer 2

The problem is that t is defined in the if clause which might not always get satisfied and you end up with the error: local variable 't' referenced before assignment .

The fix could be to either create the t object before the if block with some default setting (None) or indent the return statement if that's what you wanted.