Python 3.7.5 : Use Django Formsets.

Django Formsets manage the complexity of multiple copies of a form in a view.
This simplifies the task of creating a formset for a form that handles multiple instances of a model.
Let's start with my old project:

[mythcat@desk ~]$ cd projects/
[mythcat@desk projects]$ cd django/
[mythcat@desk django]$ source env/bin/activate

Into models.py I add these classes:

#create Inline Form with book and author
class Author(models.Model):
    author_book = models.CharField(max_length = 100)
    def __str__(self):
        return self.author_book

class Book(models.Model):
    book_name = models.CharField(max_length = 100)
    author_book_name = models.ForeignKey(Author,on_delete=models.CASCADE)
    def __str__(self):
        return self.book_name

(env) [mythcat@desk mysite]$ python3 manage.py makemigrations
Migrations for 'test001':
  test001/migrations/0004_author_book.py
    - Create model Author
    - Create model Book
(env) [mythcat@desk mysite]$ python3 manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, axes, contenttypes, sessions, test001
Running migrations:
  Applying test001.0004_author_book... OK

Add the classes to admin.py:

from .models import Author, Book
...
admin.site.register(Author)
admin.site.register(Book)

Now you can log in into the admin area and add authors and then add books.

Add the source code to views.py:

...
# add to views.py Author and Book 
from .models import Author, Book
# Author , Book redirect 
from django.shortcuts import redirect
...
# author and book source code 
def index_next(request, author_id):
    author = Author.objects.get(pk=author_id)
    BookFormset = inlineformset_factory(Author,Book, fields=('book_name',))
    if request.method == 'POST':
        formset = BookFormset(request.POST,instance = author)
        if formset.is_valid():
            formset.save()
            return redirect('index_next',author_id = author_id)
    formset = BookFormset(instance = author)
    return render(request, 'index_next.html', {'formset': formset})
...

Let's fix the URL for the next step.
Add the source code to urls.py:

...
# add index_next to urls.py 
from test001.views import index_next
...
urlpatterns = [
    ...
    path('&lt author_id &gt',views.index_next, name = 'index_next'),
    ...
    ]

Add index_next.html file into the template folder and into this file write HTML5 with a form and one submit button.
In the form tag add this:

{{ formset.as_p }}

Run the runserver command:

(env) [mythcat@desk mysite]$ python3 manage.py runserver

Use this http://127.0.0.1:8000/1 to see the first on the database shown on the browser.
You can customize the output of inline form, see source code:

...
BookFormset = inlineformset_factory(Author,Book, fields=('book_name',), can_delete=False, extra=1)
...

See the full project on my GitHub account at django_chart project repo.