old_contents: from django.contrib import admin
  from django.contrib.auth.models import User
  from django.contrib.auth.admin import UserAdmin
  from hr.models import Application, Recommendation, Audit, Blacklist, BlacklistSource
  
  class ApplicationAdmin(admin.ModelAdmin):
      list_display = ('user', 'character', 'corporation', 'status', 'recommendations')
      search_fields = ['user', 'character', 'status']
      list_filter = ('status',)
  
      def recommendations(self, obj):
          return obj.recommendation_set.all().count()
  
      recommendations.short_description = '# of Recommendations'
  
      def save_model(self, request, obj, form, change):
          obj.save(user=request.user)
  
  admin.site.register(Application, ApplicationAdmin)
  
  class RecommendationAdmin(admin.ModelAdmin):
      list_display = ('user', 'user_character', 'application')
      search_fields = ['user_character']
  
  admin.site.register(Recommendation, RecommendationAdmin)
  
  class AuditAdmin(admin.ModelAdmin):
      list_display = ('application', 'event', 'date')
      list_filter = ('event',)
  
  admin.site.register(Audit, AuditAdmin)
  
  class BlacklistAdmin(admin.ModelAdmin):
      list_display = ('type', 'value', 'source', 'created_date', 'created_by')
      list_filter = ('source', 'type')
      search_fields = ('value')
  
  admin.site.register(Blacklist, BlacklistAdmin)
  
  class BlacklistSourceAdmin(admin.ModelAdmin):
      list_display = ('id', 'name')
  
  admin.site.register(BlacklistSource, BlacklistSourceAdmin)
  
new_contents: from django.contrib import admin
  from django.contrib.auth.models import User
  from django.contrib.auth.admin import UserAdmin
  from hr.models import Application, Recommendation, Audit, Blacklist, BlacklistSource
  
  class ApplicationAdmin(admin.ModelAdmin):
      list_display = ('user', 'character', 'corporation', 'status', 'recommendations')
      search_fields = ['user', 'character', 'status']
      list_filter = ('status',)
  
      def recommendations(self, obj):
          return obj.recommendation_set.all().count()
  
      recommendations.short_description = '# of Recommendations'
  
      def save_model(self, request, obj, form, change):
          obj.save(user=request.user)
  
  admin.site.register(Application, ApplicationAdmin)
  
  class RecommendationAdmin(admin.ModelAdmin):
      list_display = ('user', 'user_character', 'application')
      search_fields = ['user_character']
  
  admin.site.register(Recommendation, RecommendationAdmin)
  
  class AuditAdmin(admin.ModelAdmin):
      list_display = ('application', 'event', 'date')
      list_filter = ('event',)
  
  admin.site.register(Audit, AuditAdmin)
  
  class BlacklistAdmin(admin.ModelAdmin):
      list_display = ('type', 'value', 'source', 'created_date', 'created_by')
      list_filter = ('source', 'type')
      search_fields = ('value',)
  
  admin.site.register(Blacklist, BlacklistAdmin)
  
  class BlacklistSourceAdmin(admin.ModelAdmin):
      list_display = ('id', 'name')
  
  admin.site.register(BlacklistSource, BlacklistSourceAdmin)
  
subject: Fix assumption in admin.py, works fine on 2.6 but errors on 2.5