Question

在我的Django应用程序中，我有一个带有ModelChoiceField的索引视图，用于选择对象。当我单击提交按钮时，我想将该对象传递给下一个视图，但它不起作用。

这是我的代码： 的观点：

def index(request):
    args = {}
    args.update(csrf(request))
    if request.user.is_authenticated():
        if request.POST:
            form = EquipmentForm(request.POST)
            if form.is_valid():
                form.save()
                request.session['chosen_equipment'] = form.cleaner(self)
                return HttpResponseRedirect('/lru/reservation/')            
        else:
            form = EquipmentForm()
        args['form'] = form
        args['user'] = request.user
        args['reservation_list'] = Reservation.objects.all()
        return render_to_response('lru/index.html', args)
    else:
        return HttpResponseRedirect('/lru/login/')

def reservation(request):
    if request.POST:
        form = ReservationForm(request.POST)
        if form.is_valid():
            form.save()
            return HttpResponseRedirect('/lru/')
    else:
        form = ReservationForm()

    form = ReservationForm(initial={'reserved_by': request.user})
    args = {}
    args.update(csrf(request))
    args['form'] = form
    args['chosen_equipment'] = request.session.get('chosen_equipment', ' Not found')

    return render_to_response('lru/reservation.html', args)

形式：

class EquipmentForm(forms.Form):

    class Meta:
        model = Equipment

    equipment = forms.ModelChoiceField(queryset=Equipment.objects.all())

    def cleaner(self):
        data = self.cleaned_data[equipment]
            return data

我在这里做错了什么？

Answer 1

试试这个版本，它应该符合您的期望：

您的forms.py：

中不需要单独的方法

class EquipmentForm(forms.Form):

    class Meta:
        model = Equipment

    equipment = forms.ModelChoiceField(queryset=Equipment.objects.all())

在views.py中，这应该有效：

from django.shortcuts import redirect
from django.shortcuts import render
from django.contrib.auth.decorators import login_required

@login_required
def index(request):
    args = {}
    args['user'] = request.user
    args['reservation_list'] = Reservation.objects.all()
    if request.user.is_authenticated():
        if request.POST:
            form = EquipmentForm(request.POST)
            if form.is_valid():
                form.save()
                request.session['chosen_equipment'] = form.cleaned_data['equipment']
                return redirect('/lru/reservation/')
            else:
                # Form invalid, so render the same view again
                args['form'] = form
                return render(request, 'lru/index.html', args)            
        else:
            form = EquipmentForm()
        args['form'] = form
        return render(request, 'lru/index.html', args)
    else:
        return redirect('/lru/login/')

@login_required
def reservation(request):
    args = {}
    args['chosen_equipment'] = request.session.get('chosen_equipment', ' Not found')
    if request.POST:
        form = ReservationForm(request.POST)
        if form.is_valid():
            form.save()
            return redirect('/lru/')
        else:
            # Always have an else condition if the form doesn't validate
            args['form'] = form
            return render(request, 'lru/reservation.html', args)
    else:

        form = ReservationForm(initial={'reserved_by': request.user})
        args['form'] = form
        return render(request, 'lru/reservation.html', args)

的变化：

无需自定义方法，因为您可以在视图中访问cleaned_data。
使用了redirect快捷方式，这种方式更加灵活。
使用render快捷方式，以便正确传递RequestContext。
为未验证表单的情况添加了代码。
添加了login_required装饰器，以确保只有登录用户才能调用视图。

将提交的表单值传递给新视图

1 个答案: