Django如何确定上传的图片是否有效？ [英] How does Django determine if an uploaded image is valid?

问题描述

我正在尝试在我的Django应用程序中添加图像到我的模型。

models.py

<$
=$
这是产品的主图像
product = models.ForeignKey（Product）
photo = models.ImageField（upload_to ='products'）

在开发模式下，尝试通过Django管理员上传图像，我不断得到：

 上传有效的图像。您上传的文件不是图像或损坏的图像。 
  

我试图上传的jpg可以使用os X Preview查看，所以似乎是

似乎问题是Python Imaging Library不会将其识别为图像。为什么会出现一个有效的图像？

PIL已安装，通过Django shell验证。

解决方案

根据Django的源代码。这三行负责验证图像：

 从PIL导入图像
 trial_image = Image.open（file）
 trial_image.verify（）
  

PIL可能不支持图像类型。检查支持的格式列表此处

I'm trying to add images to my models in my Django app.

models.py

class ImageMain(models.Model):
"""This is the Main Image of the product"""
    product = models.ForeignKey(Product)
    photo = models.ImageField(upload_to='products')

In development mode, every time I try to upload the image via Django admin, I keep getting:

Upload a valid image. The file you uploaded was either not an image or a corrupted image.

The jpg I'm trying to upload can be viewed with os X Preview so it would seem to be valid.

It seems the problem is Python Imaging Library doesn't recognize it as an image. Why would that be happening with a valid image?

PIL is installed, verified via the Django shell.

解决方案

According to Django's source code. Those three lines are responsible for verifying images:

from PIL import Image
trial_image = Image.open(file)
trial_image.verify()

The image type could be unsupported by PIL. Check the list of supported formats here

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