Django - ModelForm initial data from database - django

Question

In my Django project i create an app to have additional information about registered users. So my model looks like this:
class UserProfile(models.Model):
class Meta:
verbose_name_plural = u'User Profile'
user = models.OneToOneField(User)
birthday = models.DateField(blank=True, null=True)
avatar = models.ImageField(upload_to='media/profile/avatar', blank=True, null=True)
name = models.CharField(blank=True, null=True, max_length=20)
surname = models.CharField(blank=True, null=True, max_length=50)
phone = models.CharField(blank=True, null=True, max_length=12)
def __unicode__(self):
return '%s' % self.user
In user profile i create modelform where user can fill or edit the fields from UserProfile model:
class ExtraProfileDataForm(ModelForm):
name = forms.CharField(label=(u'Enter your name'))
surname = forms.CharField(label=(u'Enter your surname'))
phone = forms.CharField(label=(u'Enter your phone'))
birthday = forms.DateField(label=(u'Enter birthday'))
avatar = forms.ImageField(label=(u'Enter avatar'))
class Meta:
model = UserProfile
fields = ('name', 'surname', 'phone', 'birthday', 'avatar')
def __init__(self, *args, **kwargs):
super(ExtraProfileDataForm, self).__init__(*args, **kwargs)
for key in self.fields:
self.fields[key].required = False
This is the view of the model form:
#login_required
def UserFullDataForm(request):
if request.method == 'POST':
form = ExtraProfileDataForm(request.POST)
if form.is_valid():
profile_user = request.user
user_profile = UserProfile(user=profile_user)
user_profile.name = form.cleaned_data['name']
user_profile.surname = form.cleaned_data['surname']
user_profile.phone = form.cleaned_data['phone']
user_profile.birthday = form.cleaned_data['birthday']
user_profile.avatar = form.cleaned_data['avatar']
user_profile.save()
return HttpResponseRedirect('/profile/')
else:
return render(request, 'profiles/extra_profile.html', {'form':form})
else:
form = ExtraProfileDataForm()
context = {'form':form}
return render (request, 'profiles/extra_profile.html', context)
But i want to load on ExtraProfileDataForm initial data from model UserProfile if the fields not empty. I searched how to do that on Django documentation website, but nothing found. Can somebody help me to understand how to do it? Thanks a lot.

Answer 1

You use the instance parameter.
Note that you are doing much more work than necessary here; most of your view can be cut.
#login_required
def UserFullDataForm(request):
try:
profile = request.user.userprofile
except UserProfile.DoesNotExist:
profile = UserProfile(user=request.user)
if request.method == 'POST':
form = ExtraProfileDataForm(request.POST, instance=profile)
if form.is_valid():
form.save()
return HttpResponseRedirect('/profile/')
else:
form = ExtraProfileDataForm(instance=profile)
return render(request, 'profiles/extra_profile.html', {'form':form})
Similarly, in your form, you don't need the overridden __init__ method because you're manually specifying all the fields anyway; you can add required=False on each one there. However, you could make this even shorter by adding the labels in the model definition; then your entire modelform could just be:
class ExtraProfileDataForm(ModelForm):
class Meta:
model = UserProfile
fields = ('name', 'surname', 'phone', 'birthday', 'avatar')
One final note: you're consistently using three-space indentation, which is a bit, well, odd. Most Python programmers prefer two or four.