[Python] here i have some models and its linked with other models. each model is dependant...

[enter image description here][1][here before selecting sub department i have to select main department and sub comes under main department.][2]


[1]: https://i.sstatic.net/3GSQjtkl.png
[2]: https://i.sstatic.net/Tp9kg2uJ.png


these are the models. models.py

class Department(models.Model):
department_name = models.CharField(max_length=255) # ✅ Correct field
company_name = models.ForeignKey(CompanyName, on_delete=models.CASCADE)
status = models.CharField(max_length=20, choices=[('active', 'Active'), ('inactive', 'Inactive')])

def __str__(self):
return self.department_name


class SubDepartment(models.Model):
sub_department_name=models.CharField(max_length=100,null=False,blank=False)
department_name=models.ForeignKey(Department,on_delete=models.CASCADE)
company_name=models.ForeignKey(CompanyName,on_delete=models.CASCADE)
status=models.CharField(max_length=20, choices=[('active','Active'),('inactive','Inactive')])

def __str__(self):


should i make any change in forms or views?
forms.py

class DepartmentForm(forms.ModelForm):
class Meta:
model = Department
fields = ['department_name', 'company_name', 'status']


class SubDepartmentForm(forms.ModelForm):
class Meta:
model = SubDepartment
fields = ['sub_department_name', 'department_name', 'company_name', 'status']


i already give one to many into the fields but its not working as dependant. here when i select the department the corresponding sub department only should come but without selecting the dept the sub department is listing.

**views.py**

def dept_view(request):
if request.method == "POST":
form = DepartmentForm(request.POST)
if form.is_valid():
form.save()
return redirect('department-view')
else:
form = DepartmentForm()
depts = Department.objects.all()
return render(request, "dept.html", {"form": form, "depts": depts})


# @login_required(login_url="signin")
def delete_department(request, department_id):
if request.method == "POST":
department = get_object_or_404(Department, id=department_id)
department.delete()
return JsonResponse({"success": True})
return JsonResponse({"success": False})


def sub_dept_view(request):
if request.method == "POST":
form = SubDepartmentForm(request.POST)
if form.is_valid():
form.save()
return redirect("sub-department") # Redirect after successful submission
else:
form = SubDepartmentForm()

sub_depts = SubDepartment.objects.all()
return render(request, "sub_department.html", {"form": form, "sub_depts": sub_depts})


def delete_sub_department(request, sub_department_id):
if request.method == "POST":
sub_department = get_object_or_404(SubDepartment, id=sub_department_id)
sub_department.delete()
return JsonResponse({"success": True})
return JsonResponse({"success": False})

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