I want to pass a context value without rendering a page, that’s why I implemented context processor. But when I return a context value from that function it showing me this error. here is my code for payment.py:
def payment_url(request):
todays_date = date.today()
now = datetime.datetime.now()
mcnt_TxnNo = "Txn" + str(todays_date.year) + str('{:02d}'.format(
todays_date.month)) + str(todays_date.day) + str(now.hour) +
str(now.minute) +
str('{:02d}'.format(now.second))
order_no = "ON" + str(todays_date.year) + str('{:02d}'.format(
todays_date.month)) + str(todays_date.day) + str(now.hour) +
str(now.minute) +
str('{:02d}'.format(now.second))
secret_key = b"***"
print(mcnt_TxnNo)
if request.method == 'POST':
name = request.POST["clientName"]
phone = request.POST["phone"]
address = request.POST["address"]
email = request.POST["clientEmail"]
product_name = request.POST["proName"]
print("product Name", product_name)
paid = request.POST["paid"]
print(name)
string = "***"
print(string)
byte_string = bytes(string, 'utf-8')
hash_code = hmac.new(secret_key.upper(), byte_string, hashlib.sha256)
hash_text = hash_code.hexdigest()
print(hash_text)
jsonObj = {
// json object
}
json_string = json.dumps(jsonObj)
print(json_string)
url = "**"
headers = {'Content-type': 'application/json', 'Accept':
'text/plain'}
r = requests.post(url, data=json_string, headers=headers)
print(r.json())
j = r.json()['status']
k = r.json()['data']
if j == "200":
payment_id = k['payment_id']
redirect_url = k['redirect_url']
payment_link = str(redirect_url) + "?" + str(payment_id)
print(payment_link)
return {'payment_link': payment_link}
else:
return {}
And my setting.py:
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(BASE_DIR, 'templates')],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
'users.payment.payment_url',
],
},
},
]
so, basically, I’m working on a project where I created a JSON request and generated a payment_url so I returned it so that I can access it from any page. I also returned an empty dictionary when payment_url is none, But still getting the same error.
Traceback:
File "C:UsersuserDesktopDjango Web AppLen-denvenvlibsite-packagesdjangocorehandlersexception.py", line 34, in inner
response = get_response(request)
File "C:UsersuserDesktopDjango Web AppLen-denvenvlibsite-packagesdjangocorehandlersbase.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:UsersuserDesktopDjango Web AppLen-denvenvlibsite-packagesdjangocorehandlersbase.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:UsersuserDesktopDjango Web AppLen-denlen_denpagesviews.py", line 25, in index
return render(request, 'pages/index.html')
File "C:UsersuserDesktopDjango Web AppLen-denvenvlibsite-packagesdjangoshortcuts.py", line 36, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "C:UsersuserDesktopDjango Web AppLen-denvenvlibsite-packagesdjangotemplateloader.py", line 62, in render_to_string
return template.render(context, request)
File "C:UsersuserDesktopDjango Web AppLen-denvenvlibsite-packagesdjangotemplatebackendsdjango.py", line 61, in render
return self.template.render(context)
File "C:UsersuserDesktopDjango Web AppLen-denvenvlibsite-packagesdjangotemplatebase.py", line 169, in render
with context.bind_template(self):
File "C:UsersuserAppDataLocalProgramsPythonPython38libcontextlib.py", line 113, in __enter__
return next(self.gen)
File "C:UsersuserDesktopDjango Web AppLen-denvenvlibsite-packagesdjangotemplatecontext.py", line 246, in bind_template
updates.update(processor(self.request))
TypeError: 'NoneType' object is not iterable
Answer
return empty dict {} when method is GET.