old_contents: from django.contrib import admin
  from models import Group, Schedule, Deadline
  
  
  class GroupAdmin(admin.ModelAdmin):
      search_fields = ('name', 'admin')
      list_display = ('name', 'admin', 'members')
  
  class ScheduleAdmin(admin.ModelAdmin):
      search_fields = ('group', 'book')
      list_display = ('group', 'book')
  
  class DeadlineAdmin(admin.ModelAdmin):
      search_fields = ('schedule', 'end_time')
      list_display = ('group', 'from_page', 'to_page', 'end_time')
  
  
  admin.site.register(Group, GroupAdmin)
  admin.site.register(Schedule, ScheduleAdmin)
  admin.site.register(Deadline, DeadlineAdmin)
new_contents: from django.contrib import admin
  from models import Group, Schedule, Deadline
  
  class GroupAdmin(admin.ModelAdmin):
      search_fields = ('name', 'admin')
      list_display = ('name', 'admin')
  
  class ScheduleAdmin(admin.ModelAdmin):
      search_fields = ('group', 'book')
      list_display = ('group', 'book')
  
  class DeadlineAdmin(admin.ModelAdmin):
      search_fields = ('schedule', 'end_time')
      list_display = ('schedule', 'from_page', 'to_page', 'end_time')
  
  
  admin.site.register(Group, GroupAdmin)
  admin.site.register(Schedule, ScheduleAdmin)
  admin.site.register(Deadline, DeadlineAdmin)
subject: Change in Group Admin