Edit a foreign key's fields in a template - html

Question

I'm unsure of how I can edit a foreign key's fields from the template of another model - my changes do not update the model on post, see below.
models
class Projects(models.Model):
name = models.CharField(max_length=250)
class Current(models.Model):
fk_user = models.OneToOneField(User, on_delete=models.CASCADE)
fk_project = models.ForeignKey(projects, default='1', on_delete=models.CASCADE)
views
class current(LoginRequiredMixin, UserPassesTestMixin, UpdateView):
model = Current
fields = [
'fk_project'
]
template_name = 'users/current.html'
context_object_name = 'current'
def form_valid(self, form):
form.instance.fk_user = self.request.user
form.save()
# return super().form_valid(form)
return HttpResponseRedirect(self.request.path_info)
def test_func(self):
post = self.get_object()
if self.request.user == post.fk_user:
return True
return False
current.html
<form method="POST">{% csrf_token %}
<input type="text" value="{{ current.fk_project.name }}"/>
<button type="submit">post</button>

Answer 1

I would suggest you amend form_valid to follow the usual conventions. No idea if this will fix it, but
def form_valid(self, form):
instance = form.save( commit=False)
instance.fk_user = self.request.user
instance.save()
# return super().form_valid(form)
return HttpResponseRedirect(self.request.path_info)
If the desire is to update fields in the Project which is identified by the form as well as to store it in the Current instance which is the subject of this UpdateView, you can accomplish this by adding appropriate non-Model fields to the form and then processing the data in form_valid. For example, to pick a project, link it as at present, and simultaneously update its name:
class CurrentAndProjectUpdateForm( forms.ModelForm):
class Meta:
model = Current
fields = ['fk_project', ]
name = forms.CharField( ...) # new name for the related project
class current(LoginRequiredMixin, UserPassesTestMixin, UpdateView):
model = Current # don't think this now necessary
form_class = CurrentAndProjectUpdateForm # because it's implicit in this form
# fields = # DEFINITELY not needed here now
...
def form_valid(self, form):
instance = form.save( commit=False)
instance.fk_user = self.request.user
instance.save()
project = instance.fk_project
project.name = form.cleaned_data['name']
project.save()
# return super().form_valid(form)
return HttpResponseRedirect(self.request.path_info)