在通用detailview django中使用get_context_data重定向

Question

我有这个视图，我需要两个模型 Book 和 UserFav，所以我为此使用了上下文：

class BookDetailView(LoginRequiredMixin, generic.DetailView):
    model = Book
    template_name = 'book_detail.html'

    def get_context_data(self, **kwargs):
        context = super(BookDetailView, self).get_context_data(**kwargs)
        context.update({
            'fav_list': UserFav.objects.filter(user=self.request.user)
        })
        return context

还有另一个视图函数

def favorite(request, pk):
    book = get_object_or_404(Book, pk=pk)
    fav, created = UserFav.objects.get_or_create(user=request.user)
    fav.favorites.add(book)
    return render(request, 'book_detail.html', {'book': book})

收藏功能的表格

<form action="{% url 'favorite' book.id %}" method="post" style="display: inline;">
{% csrf_token %}
<button type="submit" class="btn btn-danger btn-xs">
    <span class="glyphicon glyphicon-remove"></span>&nbsp; add this book to favourite
</button>

我的网址

url(r'^book/(?P<pk>\d+)$', views.BookDetailView.as_view(), name='book-detail'),
url(r'^book/(?P<pk>\d+)/f/$', views.favorite, name='favorite'),

我需要fav_list的地方

{% if fav_list %}
{% for fav in fav_list %}
{% if book in fav.favorites.all %}Favorited
{% else %}
<form action="{% url 'favorite' book.id %}" method="post" style="display:inline;">
{% csrf_token %}
<button type="submit" class="btn btn-danger btn-xs">
    <span class="glyphicon glyphicon-remove"></span>&nbsp; add this book to favourite
</button>
 </form>
 {% endif %}
 {% endfor %}
 {% else %}
 <form action="{% url 'favorite' book.id %}" method="post" style="display: inline;">
{% csrf_token %}
<button type="submit" class="btn btn-danger btn-xs">
    <span class="glyphicon glyphicon-remove"></span>&nbsp; add this book to favourite
</button>
                                </form>
 {% endif %}

现在的问题是，当我被重定向到 book_detail.html 时，我没有得到模板所需的 fav_list 如何正确重定向或使用其他方式定义视图？

Answer 1

您没有从 favorite 视图重定向。提交表单后，重定向是一种很好的做法。

试试

from django.shortcuts import redirect
from django.urls import reverse

def favorite(request, pk):
    book = get_object_or_404(Book, pk=pk)
    fav, created = UserFav.objects.get_or_create(user=request.user)
    fav.favorites.add(book)
    # if you have an app_name in urls.py file try this
    # return redirect(reverse('YOUR_APP_NAME:book-detail', args=(pk,)))
    return redirect(reverse('book-detail', args=(pk,)))

我希望这会有所帮助。