new_contents: from django.contrib import admin
  
  from . import models
  
  
  @admin.register(models.ExternalProject)
  class ExternalProjectAdmin(admin.ModelAdmin):
      fields = (
          'name', 'url', 'description', 'tile_image', 'tile_image_copyright',
          'is_archived'
      )
      list_display = ('__str__', 'organisation', 'is_draft', 'is_archived')
      list_filter = ('is_draft', 'is_archived', 'organisation')
      search_fields = ('name',)
      date_hierarchy = 'created'
  
      def get_queryset(self, request):
          return models.ExternalProject.objects.filter(bplan=None)
  
subject: add external project