将blob参数传递给django [英] passing blob parameter to django

问题描述

我将图像作为斑点保存在数据库中

I keep my images in the DB as blobs:

class MyClass(db.Model):
    icon=db.BlobProperty()

现在，我想像这样将Blob发送到我的HTML: 可以说我有myClass作为MyClass

Now, I want to send the blob to my HTML like this : lets say I have myClass as an instance of MyClass

result = """<div img_attr=%s> Bla Bla </div>""" % (myClass.icon)

有些不起作用.你有什么主意吗?

Some how it doesn't work. Do you have any idea?

推荐答案

您不能仅将原始图像数据转储到html页面中.您需要将其分为两部分:

You cannot just dump raw image data into your html page. You need to do this in two pieces:

在您的html 中，您需要引用图像文件:

In your html, you need to refer to an image file:

result = "<div>"
         "<img src='{0}' />"
         "</div>"
         .format(MYSITE + MYIMAGEDIR + myClass.name)

您的浏览器阅读html页面，发现要包含图像，然后继续寻找要包含的图像文件-因此它会向您的网站询问类似

Your browser reads the html page, finds out you want to include an image, and goes looking for the image file to include - so it asks your site for something like http://www.myexample.com/images/icon01.jpg

现在，您分别使用图像内容来响应此第二次请求，如@anand所示.

Now, separately, you respond to this second request with the image content, as @anand has shown.

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