在Django Admin上将HTML作为只读字段返回的另一种方法

from django.contrib import admin
from django.utils.html import format_html

class HTMLFieldFilter(admin.SimpleListFilter):
    title = 'HTML字段'
    parameter_name = 'html_field'

    def lookups(self, request, model_admin):
        return (
            ('yes', '是'),
            ('no', '否'),
        )

    def queryset(self, request, queryset):
        if self.value() == 'yes':
            return queryset.filter(html_field__isnull=False)
        elif self.value() == 'no':
            return queryset.filter(html_field__isnull=True)
        else:
            return queryset

    def value(self):
        value = super().value()
        if value in ('yes', 'no'):
            return value
        return None

class YourModelAdmin(admin.ModelAdmin):
    list_display = ('id', 'your_field', 'html_field')
    list_filter = (HTMLFieldFilter,)

    def html_field(self, obj):
        if obj.html_field:
            return format_html(obj.html_field)
        return ''
    html_field.short_description = 'HTML字段'

admin.site.register(YourModel, YourModelAdmin)