[英]how to set a None value with django form
我有一個帶有谷歌 map 的表格,當用戶不點擊 map 我需要將緯度和經度作為無發送到 views.py,這是 views.py:
if request.method == "POST":
if request.user.is_authenticated:
if True:
form = CreatMeetingForm(request.POST,request.FILES)
print(request.POST)
if form.is_valid():
if 'id' in request.POST:
obj= get_object_or_404(Meeting, id=request.POST.get('id'))
form = CreatMeetingForm(request.POST or None,request.FILES or None, instance= obj)
meeting= form.save(commit= False)
members = form.cleaned_data['members_email']
try:
meeting.lat= round(form.cleaned_data['lat'],14)
meeting.lng = round(form.cleaned_data['lng'],14)
except :
meeting.lat= None
meeting.lng = None
meeting.host = request.user
update = True
meeting.save()
else :
meeting=form.save(commit=False)
members = form.cleaned_data['members_email']
try:
meeting.lat= round(form.cleaned_data['lat'],14)
meeting.lng = round(form.cleaned_data['lng'],14)
except :
meeting.lat= None
meeting.lng = None
meeting.host = request.user
update=False
meeting.save()
else:
print('form not valid')
form.errors["code"] = 0
return JsonResponse(form.errors)
else:
return HttpResponse('Unauthorized', status=401)
這是我的 model 字段:
lat = models.DecimalField(max_digits=19, decimal_places=16,blank=True,null=True)
lng = models.DecimalField(max_digits=19, decimal_places=16,blank=True,null=True)
當我想創建一個新表單時,我的代碼可以工作,但是在編輯模式下並且我在 requet.POST 中發送 id 時會引發此錯誤:
{"lat": ["Enter a number."], "lng": ["Enter a number."], "code": 0}
看來我在 form.is_valid bcs 中得到了錯誤,我可以看到 print('form not valid') 有什么建議嗎?
將默認值添加到字段定義中可能會有所幫助,如下所示:
lat = models.DecimalField(
max_digits=19,
decimal_places=16,
blank=True,
null=True,
default=None
)
lng = models.DecimalField(
max_digits=19,
decimal_places=16,
blank=True,
null=True,
default=None
)
編輯:如果這沒有幫助,請分享 CreatMeetingForm 的定義。
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