Django和Ueditor自定义存储上传文件的文件名

import os, datetime, random
filename = "%s_%d"%((datetime.datetime.now().strftime('%Y%m%d%H%M%S')), random.randrange(100, 999))

import uuid
filename = uuid.uuid1().hex

from django.db import models
from extra_apps.DjangoUeditor.models import UEditorField
from django.db.models.signals import pre_delete
from django.dispatch.dispatcher import receiver
import os, datetime, random， uuid

def update_file(instance, filename):
  ext = filename.split('.')[-1] # 获取后缀名
  # filename = "%s.%s"%(uuid.uuid1().hex, ext) # 16进制形式
  filename = "%s_%d.%s"%((datetime.datetime.now().strftime('%Y%m%d%H%M%S')), random.randrange(100, 999), ext)
  return filename


class News(models.Model):
  name = models.CharField(max_length=200, verbose_name="标题")
  front_image = models.ImageField(upload_to=update_file, null=True, blank=True, verbose_name="封面图")

from django.db import models
from extra_apps.DjangoUeditor.models import UEditorField
from django.db.models.signals import pre_delete
from django.dispatch.dispatcher import receiver
import os, datetime, random

# 使用闭包设置保存路径
def update_file(path):
  def wrapper(instance, filename):
    ext = filename.split('.')[-1] # 获取后缀名
    filename = "%s_%d.%s"%((datetime.datetime.now().strftime('%Y%m%d%H%M%S')), random.randrange(100, 999), ext)
    return os.path.join(path, filename)
  return wrapper


class News(models.Model):
  name = models.CharField(max_length=200, verbose_name="标题")
  front_image = models.ImageField(upload_to=update_file("news/images/"), null=True, blank=True, verbose_name="封面图")

"defaultPathFormat": "%(basename)s_%(datetime)s_%(rnd)s.%(extname)s"

# "defaultPathFormat": "%(basename)s_%(datetime)s_%(rnd)s.%(extname)s"
"defaultPathFormat": "%(datetime)s_%(rnd)s.%(extname)s"

"fileAllowFiles": [
    ".png", ".jpg", ".jpeg", ".gif", ".bmp",
    ".flv", ".swf", ".mkv", ".avi", ".rm", ".rmvb", ".mpeg", ".mpg",
    ".ogg", ".ogv", ".mov", ".wmv", ".mp4", ".webm", ".mp3", ".wav", ".mid",
    ".rar", ".zip", ".tar", ".gz", ".7z", ".bz2", ".cab", ".iso",
    ".doc", ".docx", ".xls", ".xlsx", ".ppt", ".pptx", ".pdf", ".txt", ".md", ".xml"
  ], 

# 取得上传的文件的原始名称
upload_original_name, upload_original_ext = os.path.splitext(upload_file_name)
upload_original_ext = upload_original_ext.lower()  # 将后缀名改为小写