Django错误(13,'权限被拒绝')

Question

我一直在http://lightbird.net/dbe/photo.html上处理这个照片管理器和共享应用程序第一部分.我正在尝试生成缩略图,当我这样做时.我收到这个错误.

我有Windows Vista.

  IOError at /admin/photo/image/add/
  (13, 'Permission denied')
  Request Method:   POST
  Request URL:  http://127.0.0.1:8000/admin/photo/image/add/
  Django Version:   1.4.3
  Exception Type:   IOError
  Exception Value:  (13, 'Permission denied')

  Exception Location:C:\Python26\lib\site-packages\PIL\Image.py in save, line 1399
  Python Executable:C:\Python26\python.exe
  Python Version:   2.6.0
  Python Path:  

  ['C:\\djcode\\mysite',
  'C:\\Python26\\python26.zip',
  'C:\\Python26\\DLLs',
  'C:\\Python26\\lib',
  'C:\\Python26\\lib\\plat-win',
  'C:\\Python26\\lib\\lib-tk',
  'C:\\Python26',
  'C:\\Python26\\lib\\site-packages',
  'C:\\Python26\\lib\\site-packages\\PIL']

  Server time: Sun, 10 Feb 2013 23:49:34 +1100

我的models.py是

from django.db import models
from django.contrib.auth.models import User
from django.contrib import admin
from string import join
from django.core.files import File
from os.path import join as pjoin
from tempfile import *

import os
from PIL import Image as PImage
from mysite.settings import MEDIA_ROOT


class Album(models.Model):
    title = models.CharField(max_length=60)
    public = models.BooleanField(default=False)
    def __unicode__(self):
        return self.title

class Tag(models.Model):
    tag = models.CharField(max_length=50)
    def __unicode__(self):
        return self.tag

class Image(models.Model):
    title = models.CharField(max_length=60, blank=True, null=True)
    image = models.FileField(upload_to="images/")
    tags = models.ManyToManyField(Tag, blank=True)
    albums = models.ManyToManyField(Album, blank=True)
    created = models.DateTimeField(auto_now_add=True)
    rating = models.IntegerField(default=50)
    width = models.IntegerField(blank=True, null=True)
    height = models.IntegerField(blank=True, null=True)
    user = models.ForeignKey(User, null=True, blank=True)
    thumbnail2 = models.ImageField(upload_to="images/", blank=True, null=True)

    def __unicode__(self):
        return self.image.name
    def save(self, *args, **kwargs):
        """Save image dimensions."""
        super(Image, self).save(*args, **kwargs)
        im = PImage.open(pjoin(MEDIA_ROOT, self.image.name))
        self.width, self.height = im.size

        # large thumbnail
        fn, ext = os.path.splitext(self.image.name)
        im.thumbnail((128,128), PImage.ANTIALIAS)
        thumb_fn = fn + "-thumb2" + ext
        tf2 = NamedTemporaryFile()
        im.save(tf2.name, "JPEG")
        self.thumbnail2.save(thumb_fn, File(open(tf2.name)), save=False)
        tf2.close()

        # small thumbnail
        im.thumbnail((40,40), PImage.ANTIALIAS)
        thumb_fn = fn + "-thumb" + ext
        tf = NamedTemporaryFile()
        im.save(tf.name, "JPEG")
        self.thumbnail.save(thumb_fn, File(open(tf.name)), save=False)
        tf.close()

        super(Image, self).save(*args, ** kwargs)

    def size(self):
        """Image size."""
        return "%s x %s" % (self.width, self.height)

    def __unicode__(self):
        return self.image.name

    def tags_(self):
        lst = [x[1] for x in self.tags.values_list()]
        return str(join(lst, ', '))

    def albums_(self):
        lst = [x[1] for x in self.albums.values_list()]
        return str(join(lst, ', '))

    def thumbnail(self):
        return """<a href="/media/%s"><img border="0" alt="" src="/media/%s" height="40" /></a>""" % (
                                                                (self.image.name, self.image.name))
    thumbnail.allow_tags = True
class AlbumAdmin(admin.ModelAdmin):
    search_fields = ["title"]
    list_display = ["title"]

class TagAdmin(admin.ModelAdmin):
    list_display = ["tag"]

class ImageAdmin(admin.ModelAdmin):
    search_fields = ["title"]
    list_display = ["__unicode__", "title", "user", "rating", "size", "tags_", "albums_","thumbnail", "created"]
    list_filter = ["tags", "albums"]
def save_model(self, request, obj, form, change):
    obj.user = request.user
    obj.save()

问题出在这里:

from django.core.files import File
from os.path import join as pjoin
from tempfile import *

class Image(models.Model):
    # ...

    thumbnail2 = models.ImageField(upload_to="images/", blank=True, null=True)

def save(self, *args, **kwargs):
    """Save image dimensions."""
    super(Image, self).save(*args, **kwargs)
    im = PImage.open(pjoin(MEDIA_ROOT, self.image.name))
    self.width, self.height = im.size

    # large thumbnail
    fn, ext = os.path.splitext(self.image.name)
    im.thumbnail((128,128), PImage.ANTIALIAS)
    thumb_fn = fn + "-thumb2" + ext
    tf2 = NamedTemporaryFile()
    im.save(tf2.name, "JPEG")
    self.thumbnail2.save(thumb_fn, File(open(tf2.name)), save=False)
    tf2.close()

    # small thumbnail
    im.thumbnail((40,40), PImage.ANTIALIAS)
    thumb_fn = fn + "-thumb" + ext
    tf = NamedTemporaryFile()
    im.save(tf.name, "JPEG")
    self.thumbnail.save(thumb_fn, File(open(tf.name)), save=False)
    tf.close()

    super(Image, self).save(*args, ** kwargs)

我该如何解决这个错误？

Answer 1

在我看来，django 没有访问您的MEDIA_ROOT文件夹所需的权限。

查看MEDIA_ROOTsettings.py 文件中的设置。然后检查文件夹的权限（类似于ls -lsa /path/to/media_rootbash shell）。确保运行 django 的用户对该文件夹具有写权限。

另外，正如 asermax 指出的那样，请确保您已在 MEDIA_ROOT 中创建了一个图像目录。

查看有关提供静态文件的文档，特别是有关提供其他目录的部分

更新

也许就是这个问题。尝试替换im.save(tf2.name, "JPEG")为im.save(tf2, "JPEG")