Model parameter database update

Using Django Forms & APIs
1

Hello everyone,

I want to update a field on database but,
get_sample.columnDataName = request.POST.get(‘textarea’) line below gives an error. It is obviously because of columnDataName parameter which holds a string data. How can I fix it dinamically? Thank you in advance.

views.py

def edit_column(request):
 if request.method == "POST":
        nplainArray = request.POST.getlist('nplainArray[]')
        columnDataName = request.POST.get('columnDataName')
        updateText = request.POST.get('textarea')

        for value in nplainArray:
            get_sample = Samples.objects.get(id=value)
            if get_sample != None:
                get_sample.columnDataName = request.POST.get('textarea')
        get_sample.save()
        messages.success(request, "Column data is updated successfully!")
        return HttpResponseRedirect("/")