Django View未返回httpresponse

Question

我有以下代碼來處理簡單的表單，我的觀點是不發回http響應。

我無法弄清楚我的代碼出了什么問題。

def novo_material(request):
current_page='material'
if request.method =='POST':
    form = SystemInventoryUpdate(request.POST)
    if form.is_valid():
        name=form.cleaned_data['name']
        qty=form.cleaned_data['qty']
        unit=form.cleaned_data['unit']
        t= NewMaterial(name=name,qty=qty,unit=unit)
        t.save()
        return HttpResponseRedirect(reverse('material'))
else:
    form=NewMaterial()
    return render(request,'novo_material.html',{'form':form})

引發此錯誤：

The view dashboard.views.novo_material didn't return an HttpResponse object. It returned None instead.

Answer 1

您處理請求是否為POST的情況，但未處理表單無效的條件（內部if-else條件）。

 if form.is_valid():
        name=form.cleaned_data['name']
        qty=form.cleaned_data['qty']
        unit=form.cleaned_data['unit']
        t= NewMaterial(name=name,qty=qty,unit=unit)
        t.save()
        return HttpResponseRedirect(reverse('material'))
 else:
    # NEED HANDLE THIS CASE WHEN FORM ISN'T VALID
    # DISPLAY ERRORS/REMINDERS ON THE SAME PAGE, ALARM USER THE INPUT
    # ARE INVLID

Answer 2

如果not form.is_valid() ，則不返回任何HttpResponse ...

def novo_material(request):
    current_page='material'
    if request.method =='POST':
        form = SystemInventoryUpdate(request.POST)
        if form.is_valid():
            name=form.cleaned_data['name']
            ''''''
            t= NewMaterial(name=name,qty=qty,unit=unit)
            t.save()
            return HttpResponseRedirect(reverse('material'))

        # No need to add `else` statement, the `return HttpResponseRedirect` above stops the `if`
        # when form is invalid, it will jump to return render, with form validations generated by Django


    else:
        form=NewMaterial()
    return render(request,'novo_material.html',{'form':form})