谁能帮我解决这个问题- Django视图(传递键)

Question

我有以下观点:

def device_port(request):
devices = Device.objects.all()
if request.method == "POST":
selected=request.POST.get('device')
devices = Device.objects.get(pk=selected)        
tablename = 'dev_interface_'+selected
print("tablename: " +tablename)
cursor=connection.cursor()
cursor.execute(f"SELECT interface FROM {tablename} WHERE id >=2")
righttable = cursor.fetchall()         
return redirect('/device/port/selected',{'devices':devices, 'selected': selected, 'righttable':righttable} )        
return render(request, 'interface/device_port.html',{'devices':devices})
def device_port_selected(request, pk):    
if request.method == "POST":
job = JobForm(request.POST)
device = devices.hostname
print(devices)
#job.associateddevice = devices.hostname
try:
selection=request.POST.get('portrange')
except:
selection = ""
messages.warning(request, "Please select the ports")
print(selection)
#job.associatedinterface = selection
return render(request, 'interface/device/port/selected/'+device+'.html',{'devices':devices, 'righttable':righttable} )        
return render(request, 'interface/device_port_selected.html',{'devices':devices, 'selected': selected, 'righttable':righttable} )

urls . py

urlpatterns = [
path('', views.home, name='interface-home'),
path('device/', DeviceListView.as_view(), name='interface-device'),
path('device_edit/<int:pk>/', views.device_edit, name='device-edit'),
path('device_delete/<int:pk>/', views.device_delete, name = 'device-delete'),
path('device_add/', views.device_add, name='device-add'),
path('device/port/', views.device_port, name='device-port'),
path('device/port/selected/', views.device_port_selected, name='device-port-selected'),
path('device/routeport/', views.device_routeport, name='device-routeport'),
path('interface/', views.interface_list, name='interface-list')
]

device_port.html

<form method="POST">
<div class="form-row align-items-center">
<div class="col-md-5 my-1">                                                 
{% csrf_token %}
<label for="Hostname">Hostname</label>
<div class="input-group">
<select id = "list" class="custom-select mr-sm-2"  onchange="getSelectValue();">
<option selected>Select</option>
{% for device in devices %}
<option value={{device.id}}>{{device.hostname}}</option>
{%endfor%}
</select>
<div class="input-group-append">                                                                            
<button class="btn btn-outline-secondary" type="submit">Go</button>
</div>
</div>
</div>                                                              
</div>                                                                                                                  
<input type ="text" name="device" id= "txtvalues" style="display:none">
</form>

我这里处理的是两页(/device/port和/device/port/selected)在第一个页面/设备/端口中，用户需要从下拉框中选择一个值，然后按下Go按钮。从这里，它打算转到下一页，即/device/port/selected，在第一页中选择的值传递到下一页。

但是使用下面的代码，我收到了错误

device_port_selected() missing 1 required positional argument: 'pk'

当从第一页移动到下一页时

Answer 1

不能将上下文字典传递给redirect。第二个参数应该是URL参数，而不是上下文。因此更改以下行:

return redirect('/device/port/selected',{'devices':devices, 'selected': selected, 'righttable':righttable} )

return redirect('device-port-selected', pk=selected)

请注意，最好使用URL的名称(即device-port-selected)而不是整个路径，因为您可以在将来更改路径而不会影响其余代码。