python - Django 管理站点 change_list 视图自定义

Question

我的模型有一个ModelAdmin子类gradeScalesSettings：

@admin.register(gradeScalesSetting)
class gradeScalesSettingAdmin(admin.ModelAdmin):
    list_display = ('configuration_select', 'NumberOfGrades', 'Rounding','Precision', 'Status',)
    change_list_template = 'admin/Homepage/view.html'

实际结果

在我点击Grade Scale Settings后：

如何将它连接到我的views.py？这就是我想在我的views.py中编码的内容：

def gradescales(request):
    gradeScalesSettings = gradeScalesSetting.objects.all()
    configurations = configuration.objects.all()
    rounding = gradeScalesSetting.objects.all().values_list('Rounding', flat=True).distinct()
    print(rounding)
    return render(request, 'Homepage/gradescale.html', {"rounding": rounding,"gradeScalesSetting":gradeScalesSettings,"configurations":configurations})

当我尝试这个时：

@admin.register(gradeScalesSetting)
class gradeScalesSettingAdmin(admin.ModelAdmin):
    def new_NumberOfGrades(self, obj):
        if obj.NumberOfGrades == 'Grade Scale Settings':
            return '<a href="view.html" </a>'  # this url will redirect to your 

在我的ModelAdmin子类中：

list_display = ('configuration_select', 'new_NumberOfGrades', 'Rounding','Precision', 'Status',)

有没有办法将它连接到我的views.py？

预期结果

这就是我想在 view.html 中显示的内容：

这就是为什么我想将它连接到我的views.py。

Answer 1

覆盖ModelAdmin.changelist_view设置extra_context。

@admin.register(gradeScalesSetting)
class gradeScalesSettingAdmin(admin.ModelAdmin):
    list_display = ('configuration_select', 'NumberOfGrades', 'Rounding','Precision', 'Status',)
    change_list_template = 'admin/Homepage/view.html'

    def changelist_view(self, request, extra_context=None):
        extra_context = extra_context or {}

        gradeScalesSettings = gradeScalesSetting.objects.all()
        configurations = configuration.objects.all()
        rounding = gradeScalesSetting.objects.all().values_list('Rounding', flat=True).distinct()

        extra_context.update({
            "rounding": rounding,
            "gradeScalesSetting": gradeScalesSettings,
            "configurations": configurations,
        })
        return super().changelist_view(request, extra_context=extra_context)

Answer 2

您可以通过覆盖更改 ModelAdmin 的路由get_urls：

class gradeScalesSettingAdmin(admin.ModelAdmin):
    def get_urls(self):
        urls = super().get_urls()
        pat = [i for i in urls if str(i.name).endswith('changelist')][0]  # Find needed path object to replace
        index = urls.index(pat)
        urls[index] = path(pat.pattern._route, gradescales)
        return urls

这样，您可以完全控制用于管理页面的视图，甚至可以根据需要添加其他页面（不仅仅是更改列表和编辑视图）。

如果您不需要像对象编辑页面这样的其他默认视图，您可以通过替换原始 url 来简化上面的代码，而不是搜索需要的并打补丁：

class gradeScalesSettingAdmin(admin.ModelAdmin):
    def get_urls(self):
        urls = [
            path('', gradescales)
        ]
        return urls