NDOJ/judge/admin/volunteer.py

from django.contrib import admin
from django.utils.html import format_html
from django.urls import reverse
from django.utils.translation import gettext, gettext_lazy as _, ungettext

from judge.models import VolunteerProblemVote


class VolunteerProblemVoteAdmin(admin.ModelAdmin):
    fields = (
        "voter",
        "problem",
        "time",
        "thinking_points",
        "knowledge_points",
        "feedback",
    )
    readonly_fields = ("time", "problem", "voter")
    list_display = (
        "voter",
        "problem_link",
        "time",
        "thinking_points",
        "knowledge_points",
        "feedback",
    )
    date_hierarchy = "time"

    def problem_link(self, obj):
        url = reverse("admin:judge_problem_change", args=(obj.problem.id,))
        return format_html(f"<a href='{url}'>{obj.problem.code}</a>")

    problem_link.short_description = _("Problem")
    problem_link.admin_order_field = "problem__code"