code: def handle(self, *args, **options):
          
  
          def get_user(username):
              try:
                  return User.objects.get(username=username)
              except ObjectDoesNotExist as e:
                  raise CommandError("This user doesn't exist in the database")
  
          def add_permissions(user_field_permissions, content_type, name):
  
              p = None
              try:
                  p = FieldPermission.objects.get(content_type=content_type, name=name)
              except ObjectDoesNotExist:
                  p = FieldPermission(content_type=content_type, name=name)
                  p.save()
              finally:
                  user_field_permissions.permissions.add(p)
  
  
  
          if len(args) !=1:
               raise CommandError("Specifies a json file created by the fine_permissions_dump command")
          else:
              try:
  
  
                  with open(args[0], 'r') as json_file:
                      myjson = json.load(json_file)
  
                      user = get_user(options.get('user')) if options['user'] else get_user(myjson['username'])
                      fields_permissions = myjson['fields_permissions']
  
                      user_field_permissions = UserFieldPermissions(user=user)
                      user_field_permissions.save()
  
                      for f in fields_permissions:
                          content_type = ContentType.objects.get(app_label=f["app_label"], model=f["model"])
                          add_permissions(user_field_permissions, content_type, f['name'])
  
  
              except Exception as e:
                  raise CommandError(e)
docs: dump fields permissions for a user