"next" is not redirecting to expected position - django

Question

I am making a wallet app so if someone goes to http://127.0.0.1:8000/add_money/ to add money and they are not logged in they will be redirected to the login page with next there after the user logs in it should be redirected back to add_money but it is being redirected to their profile.
//ADD MONEY VIEW
def add_money(request):
if not request.user.is_authenticated():
return render(request, 'registration/login.html', {"next": '/add_money/'})
else:
if request.POST:
username = request.user.username
add_amount = request.POST['amount']
wallet = Wallet.objects.filter(username=username).update(add_money(add_amount))
now = datetime.now()
trans = Transaction(from_name=username, wallet_id=wallet.id, date=now, amount=add_amount)
trans.save()
return render(request, 'user_profile.html', {'user': request.user})
return render(request, 'registration/login.html', {"next": '/add_money/'})
//Login View
def user_login(request):
if request.POST:
username = request.POST['username']
password = request.POST['password']
user = authenticate(username=username, password=password)
if user is not None:
if user.is_active:
login(request, user)
if request.POST['next']:
return render(request, '/add_money/')
return render(request, 'user_profile.html',{'user': user, 'wallet': user.userprofile.wallet_id})
else:
return render(request, 'registration/login.html', {'error': 'User is not active'})
else:
return render(request, 'registration/login.html', {'error': 'User does not exist'})
else:
return render(request,'registration/login.html')
//login template
{% if next %}
<form action="/login/?next={{next}}" method="post">
<input type="hidden" name="next" value={{ next }}>
{%else%}
<form action="/login/" method="post" >
{% endif %}
USERNAME <input type="text" name="username">
PASSWORD <input type="password" name="password">
<input type="submit">
<input type="hidden" name="next">
{% csrf_token %}
</form>
//add_money template
<form action="user_profile.html" method="post">
Amount:<input type="number" name="amount">
<input type="submit" value="Submit">
<button type="button" name="cancel">Cancel</button>
</form>

Answer 1

I'm not sure it how it even manages to get to the account page since you're using the render tag as a mixture of render and redirect.
return render(request, '/add_money/')
You should return a redirect response back to the next url instead
return HttpResponseRedirect(request.GET['next'])
Also, you're passing the next to the login template, not the url
if not request.user.is_authenticated():
return render(request, 'registration/login.html', {"next": '/add_money/'})
you should redirect to the login page here as well with next as a get parameter
return HttpResponseRedirect('/login/?next={}'.format('/add_money/')
You should also look into using the provided url reversing methods instead of hard coding urls
You also should remove the whole if next in the template and just let the login action be the default for the page
{% if next %}
<form action="/login/?next={{next}}" method="post">
<input type="hidden" name="next" value={{ next }}>
{%else%}
<form action="/login/" method="post" >
{% endif %}
should be
<form method="post" >