old_contents: from django.contrib import admin
  
  # Register your models here.
  
new_contents: from django.contrib import admin
  from .models import CoverageFile
  
  # Register your models here.
  class CoverageFileAdmin(admin.ModelAdmin):
      list_display = ('name', 'user_name', 'version', 'date', 'coveragefile')
      list_filter = ('user_name', 'version')
      date_hierarchy = 'date'
  
  admin.site.register(CoverageFile, CoverageFileAdmin)
  
subject: Add model to admin