Django：创建一个从多个模型收集信息的管理部分

Question

我被要求在 Django 项目的管理站点中添加一个新部分，该部分将从多个模型中收集信息（因为它是一个数据库视图），但我不允许在其中更改或添加表/视图数据库。

在 SO 中检查类似问题 custom page for Django admin，我最终尝试创建一个不会由 Django 管理的“假”模型，并在 get_urls 方法中添加自定义 URL。

让代码自己解释一下：

core/admin.py

class ConfigurationOverview(Model):
    aa = ForeignKey(ModelA, on_delete=DO_NOTHING)
    bb = ForeignKey(ModelB, on_delete=DO_NOTHING)
    cc = ForeignKey(ModelC, on_delete=DO_NOTHING)

    class Meta:
        # Django won't consider this model
        managed = False
        # link to the index page at /admin
        verbose_name = 'Configuration overview'
        app_label = 'core'

     @staticmethod
     def all():
         # gather info from ModelA, ModelB, ModelC and create a collection of ConfigurationOverviews
         return []

@register(ConfigurationOverview)
class ConfigurationOverviewAdmin(ModelAdmin):

    def get_urls(self):
        urls = super(ConfigurationOverviewAdmin, self).get_urls()

        my_urls = [
            url(
                r'^$',  # /admin/core/configurationoverview/
                self.admin_site.admin_view(self.list_view),
                name='core_configurationoverview_list'
            )
        ]
        return my_urls + urls

    def list_view(self, request):
        context = {
            'configuration_overviews': ConfigurationOverview.all(),
        }
        return render(request,
                      "admin/core/configurationoverview/change_list.html",
                      context)

templates/admin/core/configurationoverview/change_list.html

{% extends "admin/change_list.html" %}

{% block content %}
AAAA
{% endblock %}

但是当访问 /admin/core/configurationoverview/ 我得到了

NoReverseMatch at /admin/core/configurationoverview/
Reverse for 'app_list' with keyword arguments '{'app_label': ''}' not found. 1

但我已经定义了app_label: core！有什么提示吗？

* 编辑 *

这是我运行的空迁移：

class Migration(migrations.Migration):
    dependencies = [...]
    operations = [
        migrations.CreateModel(
            name='ConfigurationOverview',
            fields=[],
            options={
                'managed': False,
                'verbose_name': 'Configuration overview'
            },
        ),
    ]

Answer 1

您可以尝试添加常规视图并要求用户是员工。

views.py

from django.contrib.admin.views.decorators import staff_member_required

@staff_member_required
def configuration_overview(request):
    aa = ModelA.objects.all() # customize this queryset if neccesary, paginate ...
    bb = ModelB.objects.all() # customize this queryset if neccesary, paginate ...
    cc = ModelC.objects.all() # customize this queryset if neccesary, paginate ...

    return render(request, 'admin/core/configurationoverview/change_list.html', context={'aa': aa, 'bb': bb, 'cc': cc})

urls.py

urlpatterns = [
    ###
    path('admin/configuration', views.configuration_overview) # customize the path you want
    ###
]