所以我正在嘗試構建一個簡單的視圖，允許用戶使用表單提交來更改他們的頭像。在 POST 請求之前渲染視圖可以正常工作，但是當用戶通過表單提交提交新圖像文件時，我收到以下錯誤：Value Error at /The view dashboard.views.index didn't return an HttpResponse object. It returned None instead.以下是我的片段view.py@login_required(login_url='/accounts/login/')def index(request): if request.method == 'POST': if 'imagefile' in request.POST: form = forms.AvatarUpdate(request.POST, request.FILES) if form.is_valid(): image = request.FILES['image'] request.user.avatar = image request.user.save() return redirect('/') else: form = forms.AvatarUpdate() return render(request, 'dashboard/index.html', {"this_page": "home", "form": form})雖然forms.py如下：class AvatarUpdate(forms.Form): imagefile = forms.ImageField(widget=forms.FileInput(attrs={'name': "imagefile"}), label="Change user avatar")我的意圖是僅當 POST 請求包含變量時才保存模型imagefile。我應該如何解決問題？
2 回答
拉丁的傳說
TA貢獻1789條經驗 獲得超8個贊
并非所有 if 語句都返回 HttpResponse。如果要保持相同的邏輯，則需要將 else 與 HttpResponse 放在一起，并且不能將最后一個 return 放在 else 語句之外，因為您的表單變量將無法識別。
def index(request):
if request.method == 'POST':
if 'imagefile' in request.POST:
form = forms.AvatarUpdate(request.POST, request.FILES)
if form.is_valid():
image = request.FILES['image']
request.user.avatar = image
request.user.save()
return redirect('/')
else:
return render(...)
else:
return render(...)
else:
form = forms.AvatarUpdate()
return render(request, 'dashboard/index.html', {"this_page": "home", "form": form})
或者你可以定義一個默認的表單值：
def index(request):
form = None
if request.method == 'POST':
if 'imagefile' in request.POST:
form = forms.AvatarUpdate(request.POST, request.FILES)
if form.is_valid():
image = request.FILES['image']
request.user.avatar = image
request.user.save()
return redirect('/')
else:
form = forms.AvatarUpdate()
return render(request, 'dashboard/index.html', {"this_page": "home", "form": form})
牧羊人nacy
TA貢獻1862條經驗 獲得超7個贊
好的，我已經完成了這項工作，似乎輸入的變量名是request.FILESnot的一部分request.POST。所以總的來說view.py是這樣的：
@login_required(login_url='/accounts/login/')
def index(request):
form = forms.AvatarUpdate()
if request.method == 'POST':
form = forms.AvatarUpdate(request.POST, request.FILES)
if 'imagefile' in request.FILES:
if form.is_valid():
image = request.FILES['imagefile']
request.user.avatar = image
request.user.save()
return redirect('/')
else:
return render(request, 'dashboard/index.html', {"this_page": "home", "form": form})
感謝您嘗試提供幫助
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