python - Django 请求无法以干净的形式使用

Question

我无法从 ModelForm 的干净字段访问 request。我想检查请求用户是否没有尝试参加太多事件。

我试过这个修复:Django: Accessing request in forms.py clean function

...除其他外，但我仍在挣扎。

我的表格是这样的:

类 EventEditForm(forms.ModelForm):

    class Meta:
        model = Event

    def __init__(self, *args, **kwargs):
        self.request = kwargs.pop('request', None)
        super(EventEditForm, self).__init__(*args, **kwargs)


    name = forms.CharField(max_length=1024,
            initial="Give short, descriptive name",
            widget=forms.TextInput(attrs={'onfocus':'if(this.value=="Give short, descriptive name") this.value="";'}))
    location = forms.CharField(max_length=1024,
            initial="Be specific, give online map link",
            widget=forms.TextInput(attrs={'onfocus':'if(this.value=="Be specific, give online map link") this.value="";'}))
    dateTimeOptions = {
            'format': 'dd/mm/yyyy HH:ii P',
            'autoclose': 'true',
            'showMeridian': 'true',
            }
    date = forms.DateTimeField(label="Date and time",widget=DateTimeWidget(options=dateTimeOptions,
            attrs={'id':"date-time"}))
    host_act = forms.CharField(max_length=1024,
            initial="What act will you bring, if any?", required=False,
            widget=forms.TextInput(attrs={'onfocus':'if(this.value=="What act will you bring, if any?") this.value="";'}))
    description = forms.CharField(required=False, max_length=10240,
            initial="Give some details. Any activities prepared?",
            widget=forms.Textarea(attrs={'onfocus':'if(this.value=="Give some details. Any activities prepared?") this.value="";'}))


    def clean_location(self):
        cd = self.cleaned_data
        location = cd.get('location')
        if location == "Be specific, give online map link" or '':
            raise forms.ValidationError("Please enter a location")
        return location

    def clean_name(self):
        cd = self.cleaned_data
        name = cd.get('name')
        other_names = Event.objects.proposed(datetime.now)
        if name == "Give short, descriptive name" or '':
            raise forms.ValidationError("Please enter a name")
        return name

    def clean(self):
        """
        Check that there is not another event on at
        the same time and place. Then check that user has not committed
        to another event on the same date, even somewhere else.
        """
        cleaned_data = super(EventEditForm, self).clean()
        event_start_estimate = cleaned_data.get("date") - timedelta(hours=3)
        event_end_estimate = event_start_estimate + timedelta(hours=7)
        location = cleaned_data.get("location")
        events_on_date = Event.objects.\
            filter(date__range=[event_start_estimate,event_end_estimate])
        events_at_location_on_date = events_on_date.filter(location=location)
        print events_at_location_on_date
        # Check event clash is not this event clashing with itself
        try:
            events_with_same_date_and_location_id = events_at_location_on_date[0].id
        except:
            pass
        this_event_id = self.instance.id
        try:
            if events_with_same_date_and_location_id == this_event_id:
                events_at_location_on_date = False
        except:
            pass
        if events_at_location_on_date:
            raise forms.ValidationError("There is already an event on \
                this date. Please join this event or pick another \
                date and time. Note: You may have accidentally failed to \
                change the date with the picker.")
        print self.request
        user = self.request
        print user
        events_on_date_user_has_commit = events_on_date.filter(host__exact=user)
        if events_on_date_user_has_commit:
            raise forms.ValidationError("You are already committed to an event\
                on this date.")
        return cleaned_data

我的观点是:

class EventEditView(UpdateView):
    template_name = "edit_event.html"
    model=Event
    pk_url_kwarg='event_id'
    form_class = EventEditForm

Answer 1

您无法访问表单中的请求。您需要以某种方式从 View 中传递它。如果您使用的是 FormView 通用 View ，那么您链接到的答案是一种很好的方法。看起来您已经在期待发送请求:

self.request = kwargs.pop('request', None)

如果您使用基于函数的 View ，或基于非 FormView 类的 View ，只需在初始化表单时将请求作为关键字参数传递。例如:

form = EventEditForm(request.POST, request=request) # or self.request for a class based view