从HTML页面请求GET对象时，Django- MultiValueDictKeyError

Question

I am having a problem while fetching the data from HTML.

In views.py

def PrimeNumber(request):
    number = request.GET['number']
    return render(request , 'PrimeNumber.html',{'number':number})

In html file

<form action = "{% url 'PrimeNumber' %}">
    <label for="number"><b>Enter the number : </b></label>
    <input type="text" placeholder="Enter Number" name= "number" required>
</form>

Error I am facing

Exception Type: MultiValueDictKeyError
Exception Value:"'number'"

I dont what is happening over here. Since I am beginner in python I have gone through many answers on stackoverflow but did not understand how to implement that on my own code. Please inform if any information is missing.

Answer 1

Change your fetching number method same as:

number = request.GET.get('number')

And if you want default value if 'number' not passed, use below line:

number = request.GET.get('number', 0)

Attention: request.GET.get('number') return None if this parameter not find on the request.GET and default value not set.