Django图像文件上传 [英] Django image file uploads

问题描述

我只是无法弄清楚如何在django中上传图像。我在这里阅读了几十个博客文章和问题，但大多数人只是混淆了我。

I just can't figure out how to upload images in django. I've read dozens of blog posts and questions here, but most of them just confuse me more.

这是我到目前为止。这是我的模型：

Here is what I have so far. This is my model:

 class Post(models.Model):
  user = models.ForeignKey(User)
  screenshot = models.ImageField(null=True, upload_to="images")
  date = models.DateTimeField("date posted", auto_now=True)
  text = models.TextField()

这是我使用的表单：

 class PostForm(forms.Form):
   text = forms.CharField(
      widget = forms.Textarea(attrs = {'cols': 40, 'rows': 10}), required=True)
   screenshot = forms.ImageField(required=False)

这里是我当前如何处理表单：

And here is how I currently process the form:

  if request.method == 'POST':
    form = PostForm(request.POST, request.FILES)
    if form.is_valid():
      post = Post(
        user = request.user, 
    text=form.cleaned_data['text'], 
    screenshot=form.cleaned_data['screenshot']
      )
      post.save()

但是这不起作用，文件没有上传到服务器。根据有关文件上传的文档，我必须写我自己的handle_uploaded_file函数，但该页面不解释：

But this doesn't work, the file is not uploaded to the server. According to the documentation on file uploads, I have to write my own handle_uploaded_file function, but that page doesn't explain:

• 我如何知道在哪里保存上传的文件？


• 如何在多个目录中传播文件？


• 如何防止两个具有相同名称的文件相互覆盖？


• 我分配给我的模型的ImageField有什么价值？

• How do I figure out where to save the uploaded file?
• How do I spread files over multiple directories?
• How do I prevent two files with the same name to overwrite each other?
• What value do I assign to the ImageField of my model?

问题已经解决了一千次...

That seems like those problems have already been solved a thousand times...

推荐答案

最后，原来我的代码是对的，但我的Django版本错了在升级到Django 1.2.1（从1.0.2）之后，我的代码保持不变。

In the end, it turns out my code was right but my Django version was wrong. After I upgraded to Django 1.2.1 (from 1.0.2), my code worked unchanged.

回答我自己的问题

• 图像上传到我指定的upload_to目录，相对于settings.py中指定的MEDIA_ROOT


• 仍然不确定这个


• Django自动为文件名添加下划线以防止重复


• 分配 screenshot = form.cleaned_data ['screenshot'] 像上面的代码一样按照预期工作。

• The images get uploaded to the upload_to dir I specified, relative to the MEDIA_ROOT specified in settings.py
• Still not sure about this one
• Django automatically adds underscores to the file name to prevent duplicates
• assigning screenshot=form.cleaned_data['screenshot'] like in the code above works as expected.

这篇关于Django图像文件上传的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！