from django.db.models import Max
args = Argument.objects.all() 
args.aggregate(Max('rating'))

from django.db import models

class YourModel(models.Model):
  .....
  class Meta:
    get_latest_by = 'rating'

#使用的时候
max_rated_entry = YourModel.objects.latest()
return max_rated_entry.details

def get_headers_from_model(modelClass):
  '''
  根据model类对象获取对象的字段名，显示名
  :param modelClass:
  :return:
  '''
  cols = []
  headers = []
  for f in modelClass._meta.get_fields():
    try:
      cols.append( f.name )
      headers.append( f.verbose_name )
    except Exception as ex:
      pass
  return headers,cols