如何使用UpdateView来更新Django模型?

I'm trying to update a model in Django using the class-based generic view UpdateView.

我试图使用基于类的泛型视图UpdateView来更新Django中的一个模型。

I read the page Updating User model in Django with class based UpdateView to try and get me started, but I'm getting an error 'WSGIRequest' object has no attribute 'id'

我用基于类的UpdateView在Django中读取页面更新用户模型，试图让我开始，但是我得到了一个错误“WSGIRequest”对象没有属性“id”

I'm a fresh face to Django, so please be forgiving if I'm doing something stupid.

我是Django的新面孔，所以如果我做了一些愚蠢的事情，请原谅我。

//urls.py

/ / urls . py

url(r'^portfolios/update/(?P<id>\d+)/$',PortfoliosUpdateView.as_view()),

//views.py

/ / views.py

class PortfoliosUpdateView(UpdateView):
    form_class = PortfoliosCreateForm
    model = Portfolios
    template_name = 'portfolios/create.html'

    def get(self, request, **kwargs):
        self.object = Portfolios.objects.get(id=self.request.id)
        form_class = self.get_form_class()
        form = self.get_form(form_class)
        context = self.get_context_data(object=self.object, form=form)
        return self.render_to_response(context)

    def get_object(self, queryset=None):
        obj = Portfolios.objects.get(id=self.request.id)
        return obj

It's mostly just a modified version of the code originally posted, but I thought it'd work. I know that I'm trying to retrieve the id passed as a GET parameter, but that doesn't seem to come through in the request variable. Am I going about this the wrong way?

它只是最初发布的代码的一个修改版本，但我认为它可以工作。我知道我正在尝试检索作为GET参数传递的id，但这似乎在request变量中没有实现。我是不是走错路了?

Thanks

谢谢

Edit: I think I fixed it, but this may be wrong: I changed the lines

编辑:我想我修好了，但这可能是错的:我改了台词。

self.object = Portfolios.objects.get(id=self.request.id)
obj = Portfolios.objects.get(id=self.request.id)

来

self.object = Portfolios.objects.get(id=self.kwargs['id'])
obj = Portfolios.objects.get(id=self.kwargs['id'])

I could be wrong.

我可能是错的。

2 个解决方案

#1

It should be:

应该是:

def get_object(self, queryset=None):
    obj = Portfolios.objects.get(id=self.kwargs['id'])
    return obj

Look at class based generic view dispatch explains that keyword arguments are assigned to self.kwargs.:

基于类的通用视图分派解释了关键字参数被分配给self。kwargs。

def dispatch(self, request, *args, **kwargs):
    # Try to dispatch to the right method; if a method doesn't exist,
    # defer to the error handler. Also defer to the error handler if the
    # request method isn't on the approved list.
    if request.method.lower() in self.http_method_names:
        handler = getattr(self, request.method.lower(), self.http_method_not_allowed)
    else:
        handler = self.http_method_not_allowed
    self.request = request
    self.args = args
    self.kwargs = kwargs
    return handler(request, *args, **kwargs)

#2

id = self.request.GET.get('id',None) is what you needed when trying to access the GET query string.

id = self.request.GET.get('id'，None)是您在尝试访问GET查询字符串时需要的。

However, your view can be simplified:

不过，你的观点可以简化:

from django.conf.urls import *
from django.views.generic import UpdateView
from yourapp.models import Portfolios
from yourapp.forms import PortfoliosCreateForm

urlpatterns = patterns('',
    url('^portfolios/update/(?P<pk>[\w-]+)$', UpdateView.as_view(
        model=Portfolios,
        form_class=PortfoliosCreateForm,
        template_name='portfolios/create.html',
        success_url='/portfolios'
    ), name='portfolio_update'),
)

#1