所以我正在嘗試構(gòu)建一個(gè)簡(jiǎn)單的視圖，允許用戶(hù)使用表單提交來(lái)更改他們的頭像。在 POST 請(qǐng)求之前渲染視圖可以正常工作，但是當(dāng)用戶(hù)通過(guò)表單提交提交新圖像文件時(shí)，我收到以下錯(cuò)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(dāng) POST 請(qǐng)求包含變量時(shí)才保存模型imagefile。我應(yīng)該如何解決問(wèn)題？
2 回答
拉丁的傳說(shuō)
TA貢獻(xiàn)1789條經(jīng)驗(yàn) 獲得超8個(gè)贊
并非所有 if 語(yǔ)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(gè) return 放在 else 語(yǔ)句之外，因?yàn)槟谋韱巫兞繉o(wú)法識(shí)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(gè)默認(rèn)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(xiàn)1862條經(jīng)驗(yàn) 獲得超7個(gè)贊
好的，我已經(jīng)完成了這項(xiàng)工作，似乎輸入的變量名是request.FILESnot的一部分request.POST。所以總的來(lái)說(shuō)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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