Updating "about me" field - django

Question

I'm having a great deal of difficulty trying to submit a quick form to update a user's "About Me" section. It's an optional field, users can leave it blank if they wish. I can't figure it out!
models.py:
class UserProfile(models.Model):
user = models.OneToOneField(User)
activation_key = models.CharField(max_length=40, blank=True)
key_expires = models.DateField(default=datetime.date.today())
about_me = models.CharField(max_length=500, blank=True, null=True, default='')
portfolio_site = models.URLField(max_length=200, blank=True, null=True, default='')
def __str__(self):
return self.user.username
forms.py:
class UserForm(forms.Form):
class Meta:
model = User
fields = ['first_name', 'last_name', 'password', 'email', 'username']
class ProfileForm(forms.Form):
class Meta:
model = UserProfile
fields = ['about_me', 'portfolio_site']
views.py:
#login_required(login_url='sign_in')
def update_about(request, user_id):
# Accquire submitted data and place to "data"
data = request.POST
# Isolate submitted data under "id_about_me", and place it to "about_me"
about_me = data.get('id_about_me')
new_about = UserProfile(id=request.user.id, about_me=about_me)
new_about.save()
return HttpResponse('Great Job!')
If I use "user_id=request.user.id", then it says:
IntegrityError at /update_about/1/
UNIQUE constraint failed: register_userprofile.user_id
If I use "id=request.user.id", then it says:
IntegrityError at /update_about/1/
NOT NULL constraint failed: register_userprofile.user_id
I can handle other updates just fine, but this one has me stumped!

Answer 1

I think it's because you're creating a new instance of your UserProfile model and assigning the same user_id to it, leading to the Unique constraint error. You should first retrieve your already existing model and modify it like so:
new_about = UserProfile.objects.get(user_id=user_request_id)
new_about.about_me = about_me
new_about.save()
Tell me if this works. If user_id is your auto-primary-key field, though, this shouldn't be an issue.

Answer 2

You need to create, or fetch a profile if it already exists:
profile,created = UserProfile.objects.get_or_create(user=request.user)
profile.about_me = about_me
profile.save()
But why don't you use the form?
from django.shortcuts import redirect, render
from .forms import ProfileForm
#login_required(login_url='sign_in')
def update_about(request, user_id):
form = ProfileForm(request.POST or None)
if form.is_valid():
profile = form.save(commit=False)
profile.user = request.user
profile.save()
return redirect('/')
return render(request, 'update_profile.html', {'form': form})
Your template just has the normal form rendering logic:
<form method="POST">
{% csrf_token %}
{{ form }}
<input type="submit">
</form>