如何从姜戈形态中获取价值？

Question

我有一个窗体，其中有一个字段用于选择一个方法来对对象进行排序。但是，当我引用该字段以获取它的值时，它就等于呈现此表单的HTML代码。我如何解决这个问题？

我的表单：

class sortChoice(forms.Form):
    CHOICES = [('sbd', 'Сортировать по дате'),
                ('sbp', 'Сортировать по популярности')]
    choice = forms.ChoiceField(choices = CHOICES, widget = forms.RadioSelect, label = 'Сортировка по')

我的观点：

@login_required(login_url = 'login')

def vacancyListView(request):
    searchQueryNavbar = request.GET.get('search_navbar', '')
    searchQueryVLpage = request.GET.get('search_vlpage', '')
    form = sortChoice()
    print(form['choice'])
    if searchQueryNavbar or searchQueryVLpage:
        if searchQueryNavbar:
            searchQuery = searchQueryNavbar
        else:
            searchQuery = searchQueryVLpage
        if form['choice'] == 'sbp':
            queryset = Vacancy.objects.filter(Q(name__icontains = searchQuery) | Q(salary__icontains = searchQuery) | Q(competences__icontains = searchQuery)).order_by('-viewsAmount')
        if form['choice'] == 'sbd':
            queryset = Vacancy.objects.filter(Q(name__icontains = searchQuery) | Q(salary__icontains = searchQuery) | Q(competences__icontains = searchQuery)).order_by('-creationDate')
    else:
        queryset = Vacancy.objects.all().order_by('-viewsAmount')
    context = {
        'objectList':queryset,
        'form':form
    }
    return render(request, "vacancyList.html", context)

打印（从['choice'])的控制台输出：

<ul id="id_choice">

    <li><label for="id_choice_0"><input type="radio" name="choice" value="sbd" required id="id_choice_0">
 Сортировать по дате</label>
</li>
    <li><label for="id_choice_1"><input type="radio" name="choice" value="sbp" required id="id_choice_1">
 Сортировать по популярности</label>
</li>
</ul>

Answer 1

您必须为表单分配数据。请参阅绑定表单和未绑定表单

form = sortChoice(request.POST or request.GET)

调用form.is_valid()后，您将能够访问cleaned_data。

然后您的代码如下所示：

@login_required(login_url = 'login')
def vacancyListView(request):
    searchQueryNavbar = request.GET.get('search_navbar', '')
    searchQueryVLpage = request.GET.get('search_vlpage', '')
    form = sortChoice(request.POST or request.GET)
    if searchQueryNavbar or searchQueryVLpage:
        if searchQueryNavbar:
            searchQuery = searchQueryNavbar
        else:
            searchQuery = searchQueryVLpage
        if form.is_valid():
            selected = form.cleaned_data.get("choice")
            if selected == 'sbp':
                queryset = Vacancy.objects.filter(Q(name__icontains = searchQuery) | Q(salary__icontains = searchQuery) | Q(competences__icontains = searchQuery)).order_by('-viewsAmount')
            if selected == 'sbd':
                queryset = Vacancy.objects.filter(Q(name__icontains = searchQuery) | Q(salary__icontains = searchQuery) | Q(competences__icontains = searchQuery)).order_by('-creationDate')
    else:
        queryset = Vacancy.objects.all().order_by('-viewsAmount')
    context = {
        'objectList':queryset,
        'form':form
    }
    return render(request, "vacancyList.html", context)

我将更改choice键,如下所示：

CHOICES = [
    ('creationDate', 'Сортировать по дате'),
    ('viewsAmount', 'Сортировать по популярности')
]

那么您就不必使用if else并这样做：

queryset = Vacancy.objects.filter(
    Q(name__icontains = searchQuery) | Q(salary__icontains = searchQuery) | Q(competences__icontains = searchQuery)
).order_by('-%s' % form.cleaned_data.get("choice"))