Develop Reference

NOT NULL constraint failed: mainsite_customer.user_id

I just wanna get profile with full form or empty form.
def local_cabinet(request):
user_id = request.user.id
caruser = Checkout.objects.filter(user=request.user)
# form = CheckoutForms()
orders = request.user.orderitem_set.all()
total_orders = orders.count()
ready_order = request.user.order_set.all()
customer = Customer.objects.filter(user=request.user)
customer_form = CustomerForm()
Maybe here's problem I don't know:
if request.method == 'POST':
if customer.exists():
form = CustomerForm(request.POST, request.FILES, instance=customer)
else:
form = CustomerForm(request.POST)
if form.is_valid():
form.save()
context = {
'caruser': caruser,
'orders': orders,
'total_orders': total_orders,
'ready_order': ready_order,
'cat_selected': 0,
'customer_form': customer_form,
'customer': customer,
}
return render(request, 'localcabinet.html', context=context)
I don't know why I get this, maybe because I'm not right at saving the form.

You are missing User instance in form, that you probably need to pass it after form creation and before saving it.
You didn't provide model nor forms, but I guess it will look like this:
if request.method == 'POST':
...
else:
form = CustomerForm(request.POST)
form.user = request.user
if form.is_valid():
form.save()
...
Another thing is that you assign queryset instead of single object with filter method:
customer = Customer.objects.filter(user=request.user) # gives queryset with probably one object
customer = Customer.objects.get(user=request.user) # gives an object - but gives Error if there is None or more than one
Probably the best approach to get single object is with try and except:
try:
customer = Customer.objects.get(user=request.user)
except Customer.DoesNotExists:
customer = None
then later instead of if customer.exists() you can use simple if customer.

Why does my Submit button renders a page that is blank when it is supposed to contain the data that was just updated?

I'm trying to update the values of my database using a HTML Form.
When I Click Edit it brings me to the edit the values above.
However as I am clicking the submit button, it returns me a database but with no other values.
Is there anyone that can help me understand what I did wrong and point me to the right documentation (if any)
editclaims.html:
<div class="arrange2">
<h1>Edit Claim Form - #{{claims.id}} </h1>
</div>
<form method="POST" action="/update/{{claims.id}}">
{% csrf_token %}
views.py:
def editclaims(request,id):
context = initialize_context(request)
user = context['user']
claims = SaveClaimForm.objects.get(id=id)
if request.method == 'POST':
name = request.POST['name']
email = request.POST['email']
claim = request.POST['claim']
claimtype = request.POST.get('claimtype')
description = request.POST['description']
receipt = request.FILES['receipt']
cheque = request.POST.get('Cheque')
form = SaveClaimForm(name=name, email=email, claim=claim, claimtype=claimtype, description=description, receipt=receipt, cheque=cheque)
form.save()
return render(request, "Login/editclaims.html", {'claims':claims, 'user':user})
urls.py:
urlpatterns = [
path('existingclaims/', views.viewclaims, name='existingclaims'),
path('editclaims/<int:id>', views.editclaims, name='editclaims'),
path('update/<int:id>', views.updateclaims, name='updateclaims'),
]

It may not resolve all your problems but it will be more readable as answer.
When you get data from HTML then you create new object SaveClaimForm and it will have new ID and you will have the same object in two rows.
You have to get original Claim from database and update values in this object and save it - and then it will save it with original ID and you will have only one `object in database
def editclaims(request,id):
context = initialize_context(request)
user = context['user']
# get original object
claims = SaveClaimForm.objects.get(id=id)
if request.method == 'POST':
# update original object
claims.name = request.POST['name']
claims.email = request.POST['email']
claims.claim = request.POST['claim']
claims.claimtype = request.POST.get('claimtype')
claims.description = request.POST['description']
claims.receipt = request.FILES['receipt']
claims.cheque = request.POST.get('Cheque')
# save it with original `ID`
claims.save()
return render(request, "Login/editclaims.html", {'claims':claims, 'user':user})
BTW:
Django has special class ModelForm to create forms in HTML. It may also have methods to check if data in HTML are correct - ie. if fields are not empty, if email is correctly constructed (name#domain.com), if phone has only numbers, etc. So using ModelForm can be more useful then writing all manually in code.

form initials do not show

i am trying to set the form initials for the sender field as the logged in user, and it does not show. i removed the if request method statement and adjusted the indentaion and the initials showed. I am stuck, i believe the form is supposed to have that request method statement. i've gone through the documentation and it says the post method binds the data and submits, but there isn't any data when the page is refreshed or newly loaded. what could be wrong?
views.py
def transfer(request):
profile = Profile.objects.get(user=request.user)
if request.method == "POST":
form = TransferForm(request.POST,initial={"sender": profile})
if form.is_valid():
print(form)
form.save()
sender = models.sendcoins.objects.get(sender=request.user.profile)
profile2 = Profile.objects.get(username=receiver)
user_wallet = wallet.objects.get(owner=profile)
print(receiver)
temp = sender # NOTE: Delete this instance once money transfer is done
receiver = models.wallet.objects.get(owner=profile2) # FIELD 1
transfer_amount = sender.amount # FIELD 2
sender = models.wallet.objects.get(owner=profile) # FIELD 3
# Now transfer the money!
sender.balance = sender.balance - transfer_amount
receiver.balance = receiver.balance + transfer_amount
# Save the changes before redirecting
sender.save()
receiver.save()
temp.delete() # NOTE: Now deleting the instance for future money transactions
else:
return(HttpResponse("form is not valid"))
else:
form = TransferForm()
return render(request, "sendcoins.html", {"form": form})

Passing Form Data to View

I have the following view:
views.py
def PackingListView(request):
if request.method == "POST":
form = PackingListForm(request.POST)
if form.is_valid():
if 'preview' in request.POST:
request.session['data'] = form.cleaned_data
return redirect('myview')
....
I would like to take the data in form and pass it to this next view, and set the data variable equal to it. This was previously working, but once I added a foreign key into this form, the session no longer works as it is not serializable. What approach is the safest for me to take here?
views.py
class myview(View):
def get(self, request, *args, **kwargs):
data = request.session.pop('data', {})#this won't work now
pdf = render_to_pdf('packlist_preview.html', data)
return HttpResponse(pdf, content_type='application/pdf')
Also in case it is needed - here is the URL for myview
url(r'^myview/', views.myview.as_view(), name='myview'),

You should be able to serialize the data if you replace the model instance with its id.
data = form.cleaned_data
# remove object from data dict
related_object = data.pop('related_object')
# add in a reference
data['related_object_id'] = related_object.pk
# now you should be able to serialize object
request.session['data'] = data
Then in the next view, you can fetch the object from the database using its id
data = request.session.pop('data', {})
related_object_id = data.pop('related_object_id', None)
if related_object_id:
try:
data['related_object'] = RelatedObject.objects.get(pk=related_object_id)
except RelatedObject.DoesNotExist:
pass

Getting error in refering user object django

def itemconfirmation(request, pk):
item = Food_item.objects.get(id=pk)
userobj = request.user
user = UserProfile.objects.get(user=userobj)
if request.method == 'POST':
count_form = CountForm(data=request.POST)
if count_form.is_valid():
countform = count_form.save(commit=False)
countform.useradno = user.adno
countform.itemid = item.id
countform.save()
c = RequestContext(request, {
'item': item, 'count_form': count_form
})
return render_to_response('itemconfirmation.html', context_instance=c)
I have a view defined like this. I'm getting error in making the user object extended to UserProfile and cannot user the user.id

Is the request.user authenticated? is it an AnonymousUser?
UserProfile.objects.get() method is not for creating an object but to get it from the database.
if it doesn't exist an exception will be raised.
use UserProfile.objects.create(..) with the initial data you may need for it.
hope this helps!
== edit ==
also, note that you are referring count_form in the RequestContext even when it wasn't initialized in case that the request.method was not "POST" (i.e. "GET")