old_contents: from django.contrib import admin
  
  from .models import NotificationSubscriptions
  
  
  # Register your models here.
  
  class SubscriptionsAdmin(admin.ModelAdmin):
      readonly_fields = ('member',)
      search_fields = ('member',)
  
  
  admin.site.register(NotificationSubscriptions, SubscriptionsAdmin)
  
new_contents: from django.contrib import admin
  
  from .models import NotificationSubscriptions
  
  
  # Register your models here.
  
  class SubscriptionsAdmin(admin.ModelAdmin):
      readonly_fields = ('member',)
      search_fields = ('member__equiv_user__username',)
  
  
  admin.site.register(NotificationSubscriptions, SubscriptionsAdmin)
  
subject: Fix broken search in admin