Odtnhj

I want to be able to have a user update two models with one submit button. The first model will house all of the book titles (unique) and pages that users submit. The other will show which users submitted which books.

Ideally, I'd like to do something like this:

if request.method == "POST":
form = AddBookForm(request.POST)

if form.is_valid():
 books = form.save(commit=False)
 ub = UserBooks()

 books.book_title = form.cleaned_data['book_title']
 books.book_total_pages = form.cleaned_data['book_total_pages']

 ub.user = request.user
 ub.book_title = form.cleaned_data['book_title']

 ub.save()
 books.save()

 return redirect('new_book')

But that's giving me the error:

Cannot assign "'Some Book Title'": "UserBooks.book_title" must be a
"Books" instance.

What would be the best way to update two models with one form?

Here are the other files.
models.py

class Books(models.Model):

 created = models.DateTimeField(auto_now_add=True, editable=False)
 last_updated = models.DateTimeField(auto_now=True, editable=False)

 book_title = models.CharField(max_length=100, unique=True)
 book_total_pages = models.IntegerField()


 class Meta:
 ordering = ('-created',)

 def __str__(self):
 return '0'.format(self.book_title)


class UserBooks(models.Model):

 user = models.ForeignKey(User, on_delete=models.CASCADE, null=False, blank=False)
 book_title = models.ForeignKey(Books, on_delete=models.CASCADE, null=False, blank=False)

views.py

def new_book(request):
 user = request.user

 if request.method == "POST":
 form = AddBookForm(request.POST)

 if form.is_valid():
 books = form.save(commit=False)
 books.book_title = form.cleaned_data['book_title']
 books.book_total_pages = form.cleaned_data['book_total_pages']
 books.save()

 return redirect('new_book')
 else:
 form = AddBookForm()
 return render(request, 'main/addanewbook.html', 
 'form': form,
 'allBooks': allBooks,
 'userbooks': userbooks,
 )

forms.py

class AddBookForm(forms.ModelForm):
 class Meta:
 model = Books
 fields = ('book_title', 'book_total_pages')

you need to change a bit in the view

if form.is_valid():
 books = form.save(commit=False)
 ub = UserBooks()

 books.book_title = form.cleaned_data['book_title']
 books.book_total_pages = form.cleaned_data['book_total_pages']
 books = books.save()
 ub.user = request.user
 ub.book_title = books

 ub.save()


 return redirect('new_book')

this will do it