e11sync/app/signup/admin.py

from django.contrib import admin

from .models import Signup

@admin.register(Signup)
class SignupAdmin(admin.ModelAdmin):
    _all_fields = ["email", "created_at", "anonymized_ip", "user_agent"]

    date_hierarchy = "created_at"
    list_display = ["email", "created_at", "anonymized_ip", "user_agent"] + ["place_name"]
    list_filter = ["email", "user_agent"]
    ordering = ["created_at"]
    readonly_fields = _all_fields + ["place_name"]