Django更新表格?

时间:2014-09-24 09:26:04

标签: python django forms

我有一个用户输入位置信息的表单。我正在尝试制作更新表单,以便用户可以单击某个位置上的更新按钮,更新表单中会填充该位置已存在的数据。我已经关注了Django文档,但我得到了一个空白屏幕。我不确定如何让它引用要更新的位置。这是我到目前为止所拥有的。

models.py

class Location(models.Model):
    # Details on location

views.py

    def locations(request):
        return render_to_response('locations/locations.html', {'locations': Location.objects.all() })

    def location(request, location_id=1):
        return render_to_response('locations/location.html', {'location': Location.objects.get(id=location_id) })

    def create(request):
        if request.POST:
            form = LocationForm(request.POST, request.FILES)
            if form.is_valid():
                form.save()

                return HttpResponseRedirect('/accounts/loggedin/locations/all/')
        else:
            form = LocationForm()

        args = {}
        args.update(csrf(request))

        args['form'] = form

        return render_to_response('locations/create_location.html', args)

def edit_location(request): 

    if request.POST:
        form = LocationUpdate(request.POST, request.FILES)
        if form.is_valid():
            form.save()

            return HttpResponseRedirect('/accounts/loggedin/locations/all/')
    else:
        form = LocationUpdate()

    args = {}
    args.update(csrf(request))

    args['form'] = form

    return render_to_response('locations/location_update.html', args) 

forms.py

from django.views.generic.edit import UpdateView
from models import Location

class LocationForm(forms.ModelForm):

    class Meta:
        model = Location
        exclude = ('timestamp', 'updated')

class LocationUpdate(UpdateView):
    model = Location
    template_name_suffix = '_update_form'

url.py

url(r'^accounts/loggedin/location/update/$', 'assessments.views.edit_location'),

location_update.html

<!DOCTYPE html>
    <html>
        <head>

        </head>
        <body>
        <form action="" method="post">{% csrf_token %}
        {{ form.as_p }}
        <input type="submit" value="update" />
    </form>
        </body>
    </html>

或者它应该在location.html中。如果我在那里添加它,我会收到CSRF verification failed错误

<div class="row">
        <div class="col-md-4">
            <dl class="dl-horizontal">
                <dt>ID:</dt>
                <dd>{{ location.id }}</dd>
                <br />
                <dt>Company:</dt>
                <dd>{{ location.company }}</dd>
                <dt>Address:</dt>
                <dd>{{ location.address }}</dd>
                <dt>Town:</dt>
                <dd>{{ location.town_city }}</dd>
                <dt>County:</dt>
                <dd>{{ location.county }}</dd>
                <dt>Telephone:</dt>
                <dd>{{ location.tel }}</dd>
                ###### ect #####
    </div>
</div>
<form action="" method="post">{% csrf_token %}
        {{ form.as_p }}
        <input type="submit" value="update" />
    </form>    

1 个答案:

答案 0 :(得分:7)

我看到一些问题:

  1. 您的更新视图与您的创建视图完全相同。
  2. 您正在更新视图中将 UpdateView类 作为表单传递。
  3. 如果您打算使用更新视图,您不需要将其包装在另一个视图中或将其用作表单,它完全是独立的。

    views.py (不是forms.py)中:

    from .models import Location
    from .forms import LocationForm
    
    class LocationUpdateView(UpdateView):
        model = Location
        template_name = 'locations/location_update.html'
        form_class = LocationForm
        success_url = '/accounts/loggedin/locations/all/'
    

    urls.py

    url('location/update/(?P<pk>\d+)/$', LocationUpdateView.as_view(),
                                         name='location-update'),
    

    如果您像这样连接它,则需要使用要更新的位置对象的主键调用更新视图。这将确保表单填充数据;所以称之为<a href="{% url 'location-update' pk=1 %}">update location id 1</a>

    如果您不想使用基于类的视图,那么应该更新您的视图以首先加载数据,填充表单,然后将表单发送给用户,就像上面的UpdateView一样,您需要通过在主键(或其他引用)中,加载要编辑记录的对象:

    def update_location(request, pk=None):
        obj = get_object_or_404(Location, pk=pk)
        form = LocationForm(request.POST or None,
                            request.FILES or None, instance=obj)
        if request.method == 'POST':
            if form.is_valid():
               form.save()
               return redirect('/accounts/loggedin/locations/all/')
        return render(request, 'locations/location_update.html', {'form': form})