Django - passing a parameter from page redirect - django

I just started with Python and Django and want to redirect a user to a home page after successful form-registration with a head-massage changed to "You have successfully registered".
My code without changing a massage after redirection is:
urls.py:
urlpatterns = [
path('', IndexView.as_view(), name = 'index'),
path('register/', views.register, name = 'register'),
]
views.py:
class IndexView(TemplateView):
template_name = 'first_ap/index.html'
def get_context_data(self, *args, **kwargs):
t_user = 'Hello my friend'
context = {
'viva':t_user
}
return context
def register(request):
if request.method == "POST":
form = RegForm(request.POST)
if form.is_valid():
new_user = form.save(commit=False)
new_user.set_password(form.cleaned_data['password'])
new_user.save()
return redirect('index')
else:
form = RegForm()
return render(request, 'first_ap/register.html', {'form': form})
In html file I put:
<h1>{{ viva }}!</h1>
How should I modify a code to change a context after redirection from "Hello my friend" to "You have successfully registered"? I tried several options but they all failed.

Why dont you just save the message in an object variable:
class IndexView(TemplateView):
template_name = 'first_ap/index.html'
text='Hello my friend'
def get_context_data(self, *args, **kwargs):
context = {
'viva':self.text
}
return context
def register(request):
if request.method == "POST":
form = RegForm(request.POST)
if form.is_valid():
IndexView.text='You have registered'
new_user = form.save(commit=False)
new_user.set_password(form.cleaned_data['password'])
new_user.save()
return redirect('index')
else:
form = RegForm()
return render(request, 'first_ap/register.html', {'form': form})

Solution:
from django.urls import reverse
class IndexView(TemplateView):
template_name = 'first_ap/index.html'
def get_context_data(self, *args, **kwargs):
# request.GET contains the query parameters, check if `first_visit` is 1 or not
is_first_visit = self.request.GET.get('first_visit', 0) == "1"
if is_first_visit is False:
t_user = 'Hello my friend'
else:
t_user = 'You have successfully registered'
context = {
'viva': t_user
}
return context
def register(request):
if request.method == "POST":
form = RegForm(request.POST)
if form.is_valid():
new_user = form.save(commit=False)
new_user.set_password(form.cleaned_data['password'])
new_user.save()
# add a query parameter to indicate user's first visit
return redirect(reverse('index') + "?first_visit=1")
else:
form = RegForm()
return render(request, 'first_ap/register.html', {'form': form})
Add a query parameter first_visit as 1 (random value) in the redirect call after successful registration.
Access the query parameter using self.request.GET dict
Change the context value based on the value of first_visit

Related

converting CBV to FBV

I am trying to change all my Function Based View to Class based view, i’ve been fairly successful except for this view, it’s a detail view that contains paystack payment gateway. Any help will be hugely appreciated.
def car_rent_detail_view(request, pk):
object = get_object_or_404(CarRent, id=pk)
paystack = PaystackAccount(
settings.PAYSTACK_EMAIL,
settings.PAYSTACK_PUBLIC_KEY,
object.total_cost
)
context = {'object': object, 'pk_public': settings.PAYSTACK_PUBLIC_KEY, 'currency': 'NGN', 'paystack': paystack,
}
if request.method == 'POST':
if paystack.verify_transaction(request.POST['reference']):
messages.success(request, "payment successfull")
…
car_rented.save()
…
rent_activation.save()
messages.success(request, "Rent successfully updated")
return render(request, 'app/CarRent_detail.html', context=context)
I will like to convert the CBV below to FBV so i can add payment functionality to it.
class ContestantDetail(DetailView, FormMixin):
model = Contestant
context_object_name = 'contestants'
template_name = 'contest/contestant_detail.html'
form_class = VoteForm
def get_success_url(self):
return reverse('contest:contestant-detail', kwargs={'pk': self.object.pk})
def get_context_data(self, *args, **kwargs):
context = super(ContestantDetail, self).get_context_data(*args, **kwargs)
context['vote_contestant'] = Contestant.objects.get(pk=self.kwargs.get('pk'))
return context
def post(self, request, *args, **kwargs):
form = self.get_form()
self.object = self.get_object()
if form.is_valid():
return self.form_valid(form)
else:
return self.form_invalid(form)
def form_valid(self, form, *args, **kwargs):
contestant = Contestant.objects.get(pk=self.kwargs['pk'])
...
contestant.save()
messages.success(self.request, f'You have successfully casted {vote_count} vote.')
return super().form_valid(form)
The Class based View above can be converted to a Function based view as demonstrated below.
def contestant_detail_view(request, pk):
get_object_or_404(Contestant, pk=pk)
form = VoteForm()
context = {'contestants': get_object_or_404(Contestant, pk=pk),
'vote_contestant': Contestant.objects.get(pk=pk),
'form': form}
if request.method == 'POST':
form = VoteForm(request.POST)
if form.is_valid():
con = Contestant.objects.get(pk=pk)
...
con.save()
else:
form = VoteForm()
return render(request, 'contest/contestant_detail.html', context)

Displaying Django Models data in html file

I want to display data taken from my Django models in my html file. So in the code bellow instead of a 0 I want the donation model data. Can someone please help? Thank you! also if anyone knows a easier way please tell me. i can update my question again if anyone needs more details.
Views.py
from django.forms import ModelForm
# Create your views here.
def index(request,*args, **kwargs):
return render(request, "index.html", {} )
#login_required(login_url='/login/')
def myview(request,id):
data= userdetails.objects.get(id=id)
return render(request,'dashboard.html',{'data':data}
def register(request ):
if request.user.is_authenticated:
return redirect('/dashboard/')
else:
form = CreateUserForm()
if request.method == "POST":
form = CreateUserForm(request.POST)
if form.is_valid():
form.save()
username = form.cleaned_data.get('username')
messages.success(request, f'Your account has been successfully created, {username} ')
return redirect('loginpage')
context = {'form': form}
return render(request, "register.html", context )
def loginpage(request):
if request.user.is_authenticated:
return redirect('/dashboard/')
else:
if request.method == 'POST':
username = request.POST.get('username')
password =request.POST.get('password')
user = authenticate(request, username=username, password=password)
if user is not None:
login(request, user)
return redirect('/dashboard')
else:
messages.error(request, 'Username OR password is incorrect')
context = {}
return render(request, 'login.html', context)
def logoutuser(request):
logout(request)
return HttpResponseRedirect('/login/')
#login_required(login_url='/login/')
def donate(request):
if request.method == "POST":
title = request.POST['donationtitle']
phonenumber = request.POST['phonenumber']
category = request.POST['category']
quantity = request.POST['quantity']
location = request.POST['location']
description = request.POST['description']
ins = Donation(title = title, phonenumber = phonenumber, category = category, quantity = quantity, location = location, description = description, user=request.user, )
ins.save()
return render(request,'donate.html')
Error:
File "C:\Users\jbtai\coding\GoodDeedWeb\home\views.py", line 30
def register(request ):
^
You need a view that handle that:
def myview(request):
id = request.user.id
data= userderails.objects.get(id=id)
return render(request,'dashboard.html',{'data':data}
Then in your template 'dashboard.html' you could show details:
{{data.donations}}
{{data.points}}
use this url for that view instead of the old one
path('dashboard/',views.myview, name = 'dashboard' ),

how to redirect to a page with pk

i have this function
def edit_profile(request):
if request.method == 'POST':
form = EditProfileForm(request.POST, instance=request.user)
if form.is_valid():
form.save()
return redirect('/profile')
else:
form = EditProfileForm(instance=request.user)
args = {'form': form}
return render(request, 'store/edit_profile.html', args)
i want it to redirect to this function
def view_profile(request, pk):
data = cartData(request)
cartItems = data['cartItems']
shippingAddress = ShippingAddress.objects.get(id=pk)
# orderItem = OrderItem.objects.get(id=pk)
args = {'user': request.user, 'cartItems': cartItems, 'shippingAddress': shippingAddress} # 'orderItem': orderItem
return render(request, 'store/profile.html', args)
the urls
path('profile/<str:pk>/', views.view_profile, name="view_profile"),
path('profile/edit', views.edit_profile, name='edit_profile'),
i want the first function to redirect to the second but i got 'Page not found'
i know the problem with the pk. so i want it to redirect to profile/id. is there a way to solve it?
You pass it as parameter:
def edit_profile(request):
if request.method == 'POST':
form = EditProfileForm(request.POST, instance=request.user)
if form.is_valid():
form.save()
return redirect('view_profile', pk=request.user.pk)
else:
form = EditProfileForm(instance=request.user)
args = {'form': form}
return render(request, 'store/edit_profile.html', args)
You might want to change the pk to an int path converter [Django-doc]:
path('profile/<int:pk>/', views.view_profile, name="view_profile"),
path('profile/edit/', views.edit_profile, name='edit_profile'),
This will then only trigger the view in case a sequence of digits is filled in for the pk.

create help text for a field dynamically

I have my response form and view like this
class ResponseForm(ModelForm):
class Meta:
model = ResponseModel
exclude = ('author', 'title','submit_count')
# help_texts = {
# 'ans1': user.q1.value,
# }
#login_required
def ResponseFormView(request):
if request.method == "POST":
form = ResponseForm(request.POST)
if form.is_valid():
submission = form.save(commit=False)
submission.author = request.user
submission.save()
return render(request, 'thanks.html', {})
else:
form = ResponseForm()
return render(request, 'response_tem.html', {'form': form})
I want the help text for 'ans1' field to be the value of q1 field of request.user. How do I do it?
You can do it like this:
class ResponseForm(ModelForm):
def __init__(self, *args, **kwargs):
user = kwargs.pop('user', None) # popping user from known arguments
super(ResponseForm, self).__init__(*args, **kwargs)
if user:
self.fields['ans1'].help_text = "Help Text for {}".format(user.username)
class Meta:
model = ResponseModel
exclude = ('author', 'title','submit_count')
#login_required
def ResponseFormView(request):
if request.method == "POST":
form = ResponseForm(request.POST)
if form.is_valid():
submission = form.save(commit=False)
submission.author = request.user
submission.save()
return render(request, 'thanks.html', {})
else:
form = ResponseForm(user=request.user) # passing user as known argument
return render(request, 'response_tem.html', {'form': form})
Here, in the view I am passing the request.user as known argument when I am initiating Form Class's Object (marked with comment). Then in the Form, I am catching the user sent from view and updating the field's help text.

Django require user when creating password, don't require when editing

my ModelForm definition looks like this:
class UserForm(ModelForm):
password = forms.CharField(required=True, label="Password", widget=forms.PasswordInput)
So password is required when I'm creating a new user. However I'd like to NOT require it when editing the user. My edit/add is handled in views.py in the following way
#user_passes_test(lambda u: u.is_superuser)
def add(request):
if request.method == 'POST':
form = UserForm(request.POST)
if form.is_valid():
new_user = User.objects.create_user(form.cleaned_data['username'], form.cleaned_data['email'], form.cleaned_data['password'])
new_user.save()
messages.success(request, "User '%s' created" % new_user.username)
return HttpResponseRedirect('/user')
else:
form = UserForm()
return render(request, 'user/add.html', {"form": form})
#user_passes_test(lambda u: u.is_superuser)
def edit(request, id):
user = User.objects.get(id=id)
if request.method == 'POST':
f = UserForm(request.POST, instance=user)
if f.is_valid():
f.save()
messages.success(request, "User '%s' altered" % user.username)
return HttpResponseRedirect('/user')
else:
form = UserForm(instance=user)
return render(request, 'user/edit.html', {"form": form, "user": user})
Thanks for the answer.
Michal
This is what I would do:
class UserForm(ModelForm):
def __init__(self, *args, **kwargs):
is_edit = kwargs.get('is_edit', False)
if 'is_edit' in kwargs:
del kwargs['is_edit']
super(UserForm, self).__init__(*args, **kwargs)
if is_edit:
self.fields['password'].required = False
Then, in your edit() function:
f = UserForm(request.POST, instance=user, is_edit=True)
I use this type of thing fairly regularly in our codebase.