Django ImageField“上传有效图像。您上传的文件要么不是图像，要么是损坏的图像。”
我安装了 PIL，但是每当我尝试通过我的模型的 Django Admin 将 .png 文件上传到图像字段时，我会收到此错误：
“上传有效图像。您上传的文件不是图像或已损坏”图像。”
其他图像类型工作正常。我尝试过几个不同的 PNG 文件。
我在安装 pypng、libpng-dev 等后尝试重建 PIL，并且在 ubuntu 服务器上。
I have PIL installed, however whenever I try to upload a .png file to an image field through the Django Admin for my model, I get this error:
"Upload a valid image. The file you uploaded was either not an image or a corrupted image."
Other image types work fine. I have tried several different PNG files.
I have tried rebuilding PIL after installing pypng, libpng-dev, etc.. and am on ubuntu server.
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通过使用 pip 安装“pillow”而不是“pil”解决了这个问题，这样可以轻松部署到 virtualenv。
This issue was solved by using pip to install "pillow" instead of "pil" which allows easy deployment to virtualenv.
当你编译PIL时，应该会说它是否编译有PNG支持，但如果你自己安装有问题，我建议你使用ubuntu自带的版本。它的名字很奇怪，但很容易安装：
When you compile PIL it should say if it has been compiled with PNG support or not, but if you have problems installing it yourself, I would recommend that you use the version that comes with ubuntu. It's strangely named but easily installed with:
我发现在 Ubuntu 上构建 PIL 可能会导致问题，因为
libpng位于非标准位置，PIL 找不到它。在 PIL 下载到的文件夹中，编辑
setup.py。找到以下行：并将其更改为
然后重建 PIL 并检查包含 PNG 支持的末尾附近的消息。
我知道当您想要添加 PNG 支持时修改
JPEG_ROOT很奇怪，但是setup.py会在JPEG_ROOT中查找libpng< /代码>也是如此。I have found that building PIL on Ubuntu can cause problems because
libpngis in a non standard location, and PIL can't find it.In the folder that PIL has been downloaded to, edit
setup.py. Find the following line:and change it to
then rebuild PIL and check for the messages near the end that PNG support is included.
I know it's odd to modify
JPEG_ROOTwhen you want to add PNG support, butsetup.pywill look inJPEG_ROOTforlibpngtoo.