Django：将带有或不带有表格 object 的外键字段提交给模型

Question

we can submit foriegnkey data to models through ModelForm

class BooksForm(forms.ModelForm):
    class Meta:
        model = Books
        fields = "__all__"

where in templates we can add

{{form.author}} (author is foriegnkey field in  books model)

Im aware that we can submit foriegnkey data using forms like this

but my question is.is there any way where we can submit a foriegnkey object which we have fetched using some other method (with or without form ) to a model(in my case its book)

Let me explain it in detail

lets say for instance there is a Search bar when users search for author, then the function fetches list of authors (choice field) to the user where user can select and submit

which should get populated in the books model

there isnt any proper info related to this on web all i could see is information on how to save data with Foriegnnkey using model form

any kind of insights is appreciated

Answer 1

I'm not 100% sure what your desired outcome is - this is how I understand your issue:

If you want to create a Book entry while passing an Author instance along you could set it as follows:

# models.py

class Author(models.Model):
   name = models.CharField(max_length=50)

class Book(models.Model):
   author = models.ForeignKey('Author', on_delete=models.CASCADE)
   title = models.CharField(max_length=50)

# views.py

def example_view(request):
   selected_author_instance = Author.objects.get(pk=1)  # example query, adjust to your needs
   
   # Create Book instance and pass author instance along
   book_instance = Book.objects.create(
                          author=selected_author_instance,
                          title='example'
                         )
   book_instance.save()

   return render(...)