how to pass value from views to non-editable field django python - django

Question

i want to auto insert user to the follwing model:
class Moduls(models.Model):
module_name = models.CharField(max_length=255)
created_by = models.ForeignKey(settings.AUTH_USER_MODEL, db_column='created_by', blank=False, null=False , on_delete=models.CASCADE, editable = False)
i have 2 cases :
1- in django admin and i solve this case by the following
* add editable = False to created by field
* in admin.py i used the follwoing:
def save_model(self, request, obj, form, change):
obj.created_by = request.user
super().save_model(request, obj, form, change)
but i face the problem when i try to use forms.py i can't pass user from user views.py and if i want to add created_by field to my form i have this error:
'created_by' cannot be specified for Moduls model form as it is a non-editable field

Answer 1

You normally do not set that in the form, but in the view. So you define a form that looks like:
class ModulsForm(forms.ModelForm):
class Meta:
model = Moduls
fields = ['module_name']
In the view, you then set the created_by field of the instance wrapped in the view. So for a function-based view, it looks like:
from django.contrib.auth.decorators import login_required
from django.shortcuts import redirect
#login_required
def some_view(request):
if request.method == 'POST':
form = ModulsForm(request.POST, request.FILES)
if form.is_valid():
form.instance.created_by = request.user
form.save()
return redirect('name-of-some-view')
else:
form = ModulsForm()
return render(request, 'name-of-some-template.html', {'form': form})
or in a class-based view, for example a CreateView, you override the form_valid method:
from django.contrib.auth.mixins import LoginRequiredMixin
from django.views.generic import CreateView
class ModulsCreateView(LoginRequiredMixin, CreateView):
model = Moduls
form_class = ModulsForm
# …
def form_valid(self, form):
form.instance.created_by = self.request.user
return super().form_valid(form)