详解Django自定义图片和文件上传路径(upload_to)的2种方式

class UserProfile(models.Model):
 
  user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='profile')
  avatar = models.ImageField(upload_to='avatar', verbose_name="头像")

from django.db import models
from django.contrib.auth.models import User
import uuid
 
# Create your models here.
 
def user_directory_path(instance, filename):
  ext = filename.split('.')[-1]
  filename = '{}.{}'.format(uuid.uuid4().hex[:8], ext)
  # return the whole path to the file
  return "{0}/{1}/{2}".format(instance.user.id, "avatar", filename)
 
class UserProfile(models.Model):
  user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='profile')
  avatar = models.ImageField(upload_to=user_directory_path, verbose_name="头像")

from django.db import models
from django.contrib.auth.models import User
import uuid
import os
 
# Create your models here.
 
def user_directory_path(instance, filename):
  ext = filename.split('.')[-1]
  filename = '{}.{}'.format(uuid.uuid4().hex[:10], ext)
  # return the whole path to the file
  return os.path.join(instance.user.id, "avatar", filename)
 
class UserProfile(models.Model):
  user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='profile')
  avatar = models.ImageField(upload_to=user_directory_path, verbose_name="头像")

def user_directory_path(instance, filename):
  ext = filename.split('.')[-1]
  filename = '{}.{}'.format(uuid.uuid4().hex[:8], ext)
  sub_folder = 'file'
  if ext.lower() in ["jpg", "png", "gif"]:
    sub_folder = "avatar"
  if ext.lower() in ["pdf", "docx"]:
    sub_folder = "document"
  return os.path.join(instance.user.id, sub_folder, filename)

@login_required
def ajax_avatar_upload(request):
  user = request.user
  user_profile = get_object_or_404(UserProfile, user=user)
 
  if request.method == "POST":
    form = AvatarUploadForm(request.POST, request.FILES)
    if form.is_valid():
      img = request.FILES['avatar_file'] # 获取上传图片
      cropped_avatar = crop_image(img, user.id)
      user_profile.avatar = cropped_avatar # 将图片路径修改到当前会员数据库
     user_profile.save()
  return HttpResponseRedirect(reverse('myaccount:profile'))
 
 
def crop_image(file, uid):
 
  # 随机生成新的图片名，自定义路径。
  ext = file.name.split('.')[-1]
  file_name = '{}.{}'.format(uuid.uuid4().hex[:10], ext)
  cropped_avatar = os.path.join(uid, "avatar", file_name)
  # 相对根目录路径
  file_path = os.path.join("media", uid, "avatar", file_name)
 
  # 裁剪图片,压缩尺寸为200*200。
  img = Image.open(file)
  crop_im = img.crop((50,50,300, 300)).resize((200, 200), Image.ANTIALIAS)
  crop_im.save(file_path)
 
  return cropped_avatar