Django Updating Existing Model field - django

Question

I have a model in Django with a foreign key to Django User Model. I am trying to update my model with a form, but database isn't updating. I can't figure out the problem.
model.py
from django.conf import settings
class UserInfo(models.Model):
username = models.CharField(max_length = 30)
owner = models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.CASCADE,)
form.py
from django import forms
from society.models import UserInfo
class Editform(forms.ModelForm):
username=forms.CharField(widget=forms.TextInput(attrs={'onchange': 'this.form.submit();', 'class': 'editinput'}))
class Meta:
model = UserInfo
fields ='__all__'
views.py
from django.shortcuts import render
from society.models import UserInfo
from django.contrib.auth.models import User
from society.forms import Editform
def ProfileView(request):
user = request.user
username = UserInfo.objects.get(owner=user)
if request.method == 'POST':
form = Editform(request.POST, instance=username)
if form.is_valid():
form.save()
else:
form = Editform(instance=username)
return render (request, 'profile_view.html', {'user':username, 'form':form})
url.py
from django.conf.urls import url
from django.contrib import admin
import society.views
urlpatterns = [
url(r'^$', 'society.views.home'),
url(r'^admin/', admin.site.urls),
url(r'^login/', 'django.contrib.auth.views.login'),
url(r'^logout/', 'django.contrib.auth.views.logout'),
url(r'^userreg/', 'society.views.UserReg'),
url(r'^profile/', 'society.views.ProfileView'),
]
profile_view.html
<div>
<form method="POST">
{% csrf_token %}
{{form.username}}
{{user.username}}
</form>
</div>
When ever I change form.username, user.username change instantly but the database is not updating. I tried with adding a submit button, but still no luck.

Answer 1

You should pass record id for updating existing UserInfo record.
from django.shortcuts import render
from society.models import UserInfo
from django.contrib.auth.models import User
from society.forms import Editform
def ProfileView(request):
user_id = request.POST.get('user_id')
user = UserInfo.objects.get(pk=user_id)
if request.method == 'POST':
form = Editform(request.POST, instance=user)
if form.is_valid():
form.save()
else:
form = Editform(instance=user)
return render (request, 'profile_view.html', {'user':username, 'form':form})

Answer 2

You can update in 2 method for eg: here i am going to update Your username,
1) if you using object.get():
get_name = UserInfo.objects.get(owner=user)
get_name['username'] = 'Your Input what you need to change'
get_name.save()
2) if you using object.filter():
get_name = UserInfo.objects.filter(owner=user).update(username='your data') # or form.username
Thats it..

Answer 3

Apart from anything else, you haven't pointed your form at anything, so the form can't connect to the logic of the view - in effect, you've specified the form should POST content, but not where to.
The form should point to a URL in your urls.py file, which is of course linked to the view you've shown above. That works in the following way:
<form action="{% url 'core.views.new_comment' %}" method="post">
{% csrf_token %}
...
</form>
There's more guidance about how this works here in the docs. (Obviously people know that the answer's in the docs, the trick is finding it. :) )
(Also, your formatting is off in the views.py, but I think that's just a cut and paste problem when entering the question.)

Answer 4

Anyway I soloved this problem, Thank You everyone. Just Changed the form.py
from django import forms
from society.models import UserInfo
class Editform(forms.ModelForm):
username=forms.CharField(widget=forms.TextInput(attrs={'onchange': 'this.form.submit();', 'class': 'editinput'}))
class Meta:
model = UserInfo
exclude =('owner',)
As owner is a mandatory field, but I omitted it from template it was showing mandatory field error. Its working now. Thanks anyway.