Django - 在render_change_form（ModelAdmin）中获取对象标识 [英] Django - Get object id in render_change_form (ModelAdmin)

问题描述

我有这两个模型和modeladmin。在可用hostuser列表中添加新主机时，只会显示未分配给其他主机的主机。
问题是如果我编辑已经创建的主机，它的实际hostuser id也被过滤，所以我想做的是排除当前分配的hostuser id。
我可以在hostuser字段中排除当前的id吗？

我需要的语句是写在*

提前感谢

Models.py

  class HostUser（models.Model）：
 name = models.CharField（max_length = 200）
 {..More Data ..} 
 
 class主机（型号。模型）：
 {..More Data ..} 
 hostuser = models.ForeignKey（HostUser，blank = True，null = True）
  

Admin.py

  class HostAdmin（admin.ModelAdmin）：
 {..More Data ..} 
 def render_change_form（self，request，context，* args，** kwargs）：
 list_names = Host.objects.values_list（'hostuser__id'，flat = true）.exclude（hostuser__id = None）.exclude（hostuser__id = ** ACTUAL HOSTUSER_ID **）
 list_names = [int（ids）for id_number] 
 context ['adminform']。 fields ['hostuser']。queryset = HostUser.objects.exclude（id__in = lis t_names）
 return super（HostAdmin，self）.render_change_form（request，context，args，kwargs）
  

解决方案

（在编辑问题中回答。转换为社区维基答案。请参阅当问题的答案被添加到问题本身时，什么是适当的行动？）

OP写道：

使用kwargs解决，Modeladmin如下所示：

  def render_change_form（self，request，context，* args，** kwargs）：
 try：
 list_names = Host.objects.values_list（'hostuser__id'，flat = True）.exclude（hostuser__id = None ）.exclude（hostuser__id = kwargs ['obj']。hostuser.id）
除了：
 list_names = Host.objects.values_list（'hostuser__id'，flat = True）.exclude（hostuser__id = None） 
 list_names = [int（id）ids在list_names] 
上下文['adminform']。form.fields ['hostuser']。queryset = HostUser.objects.exclude（id__in = list_names）
 return super（HostAdmin，self）.render_change_form（request，co ntext，args，kwargs）
  

I have these two models and modeladmin. When adding a new host in the list of available hostuser only appear hostusers that are not assigned to another host. The issue is if I edit an already created host its actual hostuser id is also filtered so I want to do is to exclude hostuser id that is currently assigned. How I can specify in the exclude the current id from the hostuser field?

The statement that I need is written between *

Thanks in advance

Models.py

class HostUser(models.Model):
    name = models.CharField(max_length=200)
    {..More Data..}

class Host(models.Model):
    {..More Data..}
    hostuser = models.ForeignKey(HostUser, blank=True, null=True)

Admin.py

class HostAdmin(admin.ModelAdmin):
    {..More Data..}
    def render_change_form(self, request, context, *args, **kwargs):
        list_names = Host.objects.values_list('hostuser__id', flat=True).exclude(hostuser__id=None).exclude(hostuser__id=**ACTUAL HOSTUSER_ID**)
        list_names = [int(ids) for ids in list_names]
        context['adminform'].form.fields['hostuser'].queryset = HostUser.objects.exclude(id__in=list_names)
        return super(HostAdmin, self).render_change_form(request, context, args, kwargs)

解决方案

(Answered in a question edit. Converted to a community wiki answer. See What is the appropriate action when the answer to a question is added to the question itself? )

The OP wrote:

Solved using kwargs, the Modeladmin looks like this:

def render_change_form(self, request, context, *args, **kwargs):
    try:
        list_names = Host.objects.values_list('hostuser__id', flat=True).exclude(hostuser__id=None).exclude(hostuser__id=kwargs['obj'].hostuser.id)
    except:
        list_names = Host.objects.values_list('hostuser__id', flat=True).exclude(hostuser__id=None)
    list_names = [int(ids) for ids in list_names]
    context['adminform'].form.fields['hostuser'].queryset = HostUser.objects.exclude(id__in=list_names)
    return super(HostAdmin, self).render_change_form(request, context, args, kwargs)

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