old_contents: from django.contrib import admin
  from cfp.models import CallForPaper, PaperApplication, Applicant
  from django.core import urlresolvers
  
  
  class ApplicantAdmin(admin.ModelAdmin):
      readonly_fields = ('user',)
      list_display = ('full_name', 'about', 'biography', 'speaker_experience', 'github', 'twitter')
      fields = ('user', 'about', 'biography', 'speaker_experience', 'image')
  
  
  class PaperApplicationAdmin(admin.ModelAdmin):
      list_display = ('title', 'link_to_applicant', 'about', 'abstract', 'skill_level', 'duration')
      readonly_fields = ('cfp', 'applicant')
      fields = ('cfp', 'applicant', 'title', 'about', 'abstract', 'skill_level', 'duration')
  
      def link_to_applicant(self, obj):
          link = urlresolvers.reverse("admin:cfp_applicant_change", args=[obj.applicant.id])
          return u'<a href="%s">%s</a>' % (link, obj.applicant)
      link_to_applicant.allow_tags = True
  
  admin.site.register(CallForPaper)
  admin.site.register(Applicant, ApplicantAdmin)
  admin.site.register(PaperApplication, PaperApplicationAdmin)
  
new_contents: from django.contrib import admin
  from cfp.models import CallForPaper, PaperApplication, Applicant
  from django.core import urlresolvers
  
  
  class ApplicantAdmin(admin.ModelAdmin):
      list_display = ('user', 'full_name', 'about', 'biography', 'speaker_experience', 'github', 'twitter')
      fields = ('user', 'about', 'biography', 'speaker_experience', 'image')
  
  
  class PaperApplicationAdmin(admin.ModelAdmin):
      list_display = ('title', 'link_to_applicant', 'about', 'abstract', 'skill_level', 'duration')
      readonly_fields = ('cfp', 'applicant')
      fields = ('cfp', 'applicant', 'title', 'about', 'abstract', 'skill_level', 'duration')
  
      def link_to_applicant(self, obj):
          link = urlresolvers.reverse("admin:cfp_applicant_change", args=[obj.applicant.id])
          return u'<a href="%s">%s</a>' % (link, obj.applicant)
      link_to_applicant.allow_tags = True
  
  admin.site.register(CallForPaper)
  admin.site.register(Applicant, ApplicantAdmin)
  admin.site.register(PaperApplication, PaperApplicationAdmin)
  
subject: Remove user from readonly fields