Django引发forms.ValidationError不起作用 [英] Django raise forms.ValidationError not working
问题描述
我正在尝试将验证器添加到django模型表单中,这样,如果选择了特定值,则应在表单中输入其他字段(如果未输入该字段,则会显示验证错误)
I am trying to add a validator to django model form such that if specific value is selected then other field in the form should be entered if not entered it should give a validation error
如果用户从activity_name下拉列表中选择项目支持活动",则格式如下:
in the below form if the user selects "Project Support Activities" from the activity_name drop down then the project id field should be mandatory
Django表单
class ActivityTrackerModelForm(forms.ModelForm):
date = forms.DateField(label='', widget=forms.DateInput(attrs={
"placeholder": "Select Date", 'id': 'datepicker', 'class': 'form-control w-100', 'autocomplete': 'off'}))
activity_name = forms.ModelChoiceField(queryset=activity.objects.all().order_by(
'activity_name'), label='', empty_label="Select Activity", widget=forms.Select(attrs={'class': 'form-control w-100'}))
system_name = forms.ModelChoiceField(queryset=system.objects.all().order_by('system_name'), label='', empty_label="Select System", widget=forms.Select(attrs={
'class': 'form-control w-100'}))
client_name = forms.ModelChoiceField(queryset=client.objects.all().order_by(
'client_name'), label='', empty_label="Select Client", widget=forms.Select(attrs={
'class': 'form-control w-100'}))
hour_choice = [('', 'Choose Hours'), (0, 0), (1, 1), (2, 2),(3, 3), (4, 4), (5, 5), (6, 6), (7, 7), (8, 8)]
hours = forms.ChoiceField(label='', choices=hour_choice, widget=forms.Select(
attrs={'class': 'form-control w-100'}))
min_choice = [('', 'Choose Mins'), (0, 0), (15, 15), (30, 30), (45, 45)]
mins = forms.ChoiceField(label='', choices=min_choice, widget=forms.Select(attrs={'class': 'form-control w-100'}))
no_of_records = forms.IntegerField(label='', required=False, widget=forms.NumberInput(
attrs={"placeholder": "Enter no. of Records", 'class': 'form-control w-100', 'autocomplete': 'off'}))
project_id = forms.CharField(label='', required=False, widget=forms.TextInput(
attrs={"placeholder": "Project ID", 'class': 'form-control w-100'}))
user_comments = forms.CharField(
label='',
required=False,
widget=forms.Textarea(
attrs={
"placeholder": "Enter Your Comments Here...",
'rows': 6,
'class': 'form-control w-100',
'autocomplete': 'off'
}
)
)
class Meta:
model = activity_tracker
fields = ['date', 'activity_name', 'system_name', 'client_name',
'hours', 'mins', 'no_of_records', 'project_id', 'user_comments']
def clean(self):
cleaned_data = super(ActivityTrackerModelForm, self).clean()
activity = cleaned_data.get('activity_name')
project_1 = cleaned_data.get('project_id')
if re.search("^Project.*Activities$", str(activity)) or project_1 is None:
print('pass') # prints to console this is working
raise forms.ValidationError('Please Add in Project ID')#raise form error this is not working
查看:
def MyTask(request):
if request.method == 'POST':
form = ActivityTrackerModelForm(request.POST or None)
if form.is_valid():
obj = form.save(commit=False)
obj.user_name = request.user
obj.approver = tascaty_user.objects.get(
username=request.user).approver
if request.user.is_team_lead:
obj.status = activity_status.objects.get(pk=3)
obj.save()
return redirect('mytask')
queryset1_PA = activity_tracker.objects.filter(
user_name=request.user).filter(status__in=[1, 2, 4]).order_by('-id')
queryset1_AP = activity_tracker.objects.filter(
user_name=request.user).filter(status=3).order_by('-date')
paginator_RA = Paginator(queryset1_AP, 10)
paginator_PA = Paginator(queryset1_PA, 10)
page = request.GET.get('page')
context = {
'title': 'TasCaty|My Task',
'activity_form': ActivityTrackerModelForm(),
'post_page_RA': paginator_RA.get_page(page),
'post_page_PA': paginator_PA.get_page(page),
}
return render(request, "tascaty/mytask.html", context)
推荐答案
引发错误可以正常工作.但是,即使表单无效,您也始终会重定向,因此该错误将永远不会显示.
Raising the error is working fine. But you always redirect away, even if the form is not valid, so the error will never be displayed.
仅当is_valid为True时才应重定向,否则应重新显示该表单.这意味着将无效的表单传递回上下文-因此,仅当方法不是POST时,才应创建一个新表单.所以:
You should only redirect when is_valid is True, otherwise you should redisplay the form. That means passing the invalid form back to the context - so you should only create a new one when method is not POST. So:
if request.method == 'POST':
form = ActivityTrackerModelForm(request.POST or None)
if form.is_valid():
...
obj.save()
return redirect('mytask') # indented here
else:
ActivityTrackerModelForm() # added this block, note it's aligned with the first if
...
context = {
...
'activity_form': form, # pass the existing form here
...
}
return render(request, "tascaty/mytask.html", context)
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