我正在尝试将视频文件与具有一堆属性的记录相关联，但似乎不允许用户以一种形式完成所有操作 - 为视频命名、提供描述并回答一些问题，然后上传文件。
以下是我想要执行的步骤：
有没有人有任何我可以学习的例子或者你可以指点我的教程？来自谷歌的那个只显示上传文件并被重定向到它。
感谢和抱歉提出一个新问题！
【问题讨论】：
标签： python google-app-engine blobstore
这就是我的做法。它比你想象的更直接。请注意以下来自Blobstore overview 的内容。 “当 Blobstore 重写用户的请求时，上传文件的 MIME 部分的 body 被清空，并将 blob 键添加为 MIME 部分标头。所有其他表单字段和部分都保留并传递给上传处理程序。” 在上传处理程序中，您可以对其他表单字段执行任何操作。
class Topic(db.Model):
title = db.StringProperty(multiline=False)
blob = blobstore.BlobReferenceProperty()
imageurl = db.LinkProperty()
class MainHandler(webapp.RequestHandler):
def get(self):
upload_url = blobstore.create_upload_url('/upload')
self.response.out.write('<html><body>')
self.response.out.write('<form action="%s" method="POST" enctype="multipart/form-data">' % upload_url)
self.response.out.write("""Upload File: <input type="file" name="file"><br>
<div><label>Title:</label></div>
<div><textarea name="title" rows="1" cols="25"></textarea></div><input type="submit"
name="submit" value="Submit"> </form>""")
self.response.out.write('<br><br><h2>TOPIC LIST</h2><table border="1"><tr><td>')
for topic in Topic.all():
self.response.out.write('<div><img src="%s=s48"/>' % topic.imageurl)
self.response.out.write('<div><b>Image URL: </b><i>%s</i></div>' % topic.imageurl)
self.response.out.write('<div><b>Title: </b><i>%s</i></div>' % topic.title)
self.response.out.write('</td></tr></table><br>')
self.response.out.write('</body></html>')
class UploadHandler(blobstore_handlers.BlobstoreUploadHandler):
def post(self):
upload_files = self.get_uploads('file') # 'file' is file upload field in the form
blob_info = upload_files[0]
topic = Topic()
topic.title = self.request.get("title")
topic.blob = blob_info.key()
topic.imageurl = images.get_serving_url(str(blob_info.key()))
topic.put()
self.redirect('/')
def main():
application = webapp.WSGIApplication(
[('/', MainHandler),
('/upload', UploadHandler),
], debug=True)
run_wsgi_app(application)
【讨论】：
【讨论】：
这是我用来上传图片并将它们与文章相关联的代码。最困难的一点是让文章 id 到达上传处理程序，我通过将文件名设置为文章 id 来解决这个问题。
from lib import urllib2_file
from lib.urllib2_file import UploadFile
# this view serves a task in a queue
def article(request):
article = Article.objects.get(id=form.cleaned_data['article'])
try:
image = StringIO(urllib2.urlopen(image_url).read())
except (urllib2.HTTPError, DownloadError):
article.parsed = True
article.save()
else:
image = UploadFile(image, '.'.join([str(article.id), image_url.rsplit('.', 1)[1][:4]]))
upload_url = blobstore.create_upload_url(reverse('Articles.views.upload'))
try:
urllib2.urlopen(upload_url, {'file': image})
except (DownloadError, RequestTooLargeError):
pass
return HttpResponse(json.dumps({'status': 'OK'}))
def upload(request):
if request.method == 'POST':
blobs = get_uploads(request, field_name='file', populate_post=True)
article = Article.objects.get(id=int(blobs[0].filename.split('.')[0]))
article.media = blobs[0].filename
article.parsed = True
article.save()
return HttpResponseRedirect(reverse('Articles.views.upload'))
else:
return HttpResponse('meow')
def upload(request):
if request.method == 'POST':
blobs = get_uploads(request, field_name='file', populate_post=True)
article = Article.objects.get(id=int(blobs[0].filename.split('.')[0]))
article.media = blobs[0].filename
article.parsed = True
article.save()
return HttpResponseRedirect(reverse('Articles.views.upload'))
else:
return HttpResponse('meow')
# this serves the image
def image(request):
blob = BlobInfo.gql("WHERE filename='%s' LIMIT 1" % request.form.cleaned_data['id'])[0]
return HttpResponse(BlobReader(blob.key()).read(),
content_type=blob.content_type)
【讨论】：