how to set relevent foreign key django in form - django

Question

I want to submit a video section-wise. I create SectionVideo When I want to create a Video I want to set my Course name by default and want to show a relevant Section.
Course
class Course(models.Model):
instructor = models.ForeignKey(UserProfile,on_delete=models.CASCADE)
name = models.CharField(max_length = 50 , null = False,unique = True)
slug = models.CharField(max_length = 50 , null = False , unique = True)
Section:
class SectionVideo(models.Model):
course = models.ForeignKey(Course , null = False , on_delete=models.CASCADE)
name = models.CharField(max_length = 50 , null = False)
slug = models.CharField(max_length = 50 , null = False )
serial_number = models.IntegerField(null=False)
Video:
class Video(models.Model):
section_video = models.ForeignKey(SectionVideo , null = False , on_delete = models.CASCADE)
course = models.ForeignKey(Course , null = False , on_delete = models.CASCADE)
title = models.CharField(max_length = 100 , null = False)
video_description = models.CharField(max_length = 500 , null = True)
How can I make my create form for Video model?

Answer 1

You need to get the course(id) and the section(id) from a user.
Option 1. A user can select a course and a section in forms.
forms.py
from django.forms import ModelForm
from .models import Course, SectionVideo, Video
class VideoForm(ModelForm):
class Meta:
model = Video
fields = ['section_video', 'course', 'title', 'video_description']
views.py
from django.shortcuts import render
# Create your views here.
from .models import Course, SectionVideo, Video
from .forms import VideoForm
from django.forms import modelform_factory
# Create your views here.
def index(request):
# Both forms are functionally identical.
form = modelform_factory(Video, fields=('section_video', 'course', 'title', 'video_description'))
# form = VideoForm()
return render(request, 'templates/form.html', {'form': form})
Option 2. Getting the course(id) and the section(id) via video creating process, and assigning that parameters to form using initial
urls.py
If you get parameters from query, you don't need urls.py.
from django.contrib import admin
from django.urls import path
from zayed import views
urlpatterns = [
path('admin/', admin.site.urls),
path('zayed/<int:course_id>/<int:section_video_id>/', views.index, name='index'),
]
views.py
from django.shortcuts import render
# Create your views here.
from .models import Course, SectionVideo, Video
from .forms import VideoForm
# Create your views here.
def index(request, course_id, section_video_id):
form = VideoForm(initial={'course':course_id, 'section_video': section_video_id})
return render(request, 'templates/form.html', {'form': form})