如何在 Google App Engine 中加载 Blobproperty 图像? [英] How to load Blobproperty image in Google App Engine?

问题描述

我写了一些代码.

我可以将图像保存在 BobProperty 中.

I could save image in BobProperty.

但我无法将图像加载到 HTML 页面中...

But I cannot load image into HTML page...

源代码:

类产品(db.Model):

class Product(db.Model):

        image = db.BlobProperty()
            ...

类添加:

  productImage = self.request.get('image')

  product.image = db.Blob(productImage)

  product.put()

但我将 {{product.image}} 写入 html 代码.但是有像 袀 ( (:( (( >̢ ( > Y K ׏

but i wrote {{product.image}} into html code. But there were like ��袀 ���� ���� ���� (����������� ��(:(������� (������� (��>̢��� (�������>������Y������K��׏

如果我想从数据存储区加载图像，我应该怎么做?

What should i do if i want load image from datastore?

推荐答案

我使用辅助视图:

def serve_image(request, image):
    if image == "None":
        image = ""

    response = HttpResponse(image)
    response['Content-Type'] = "image/png"
    response['Cache-Control'] = "max-age=7200"
    return response

在模型中:

def get_image_path(self):
    # This returns the url of serve_image, with the argument of image's pk.
    # Something like /main/serve_image/1231234dfg22; this url will return a
    # response image with the blob
    return reverse("main.views.serve_image", args=[str(self.pk)])

只需使用 {{ model.get_image_path }} 代替.

(这是 django-nonrel，但我想你可以弄清楚它的作用)

(this is django-nonrel, but I guess you could figure out what it does)

此外， 这里有一篇关于此的帖子；你应该检查一下.

Also, there is a post here about this; you should check it out.

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