【发布时间】：2014-04-11 06:31:30
【问题描述】：
我一直在翻阅 GAE Python Blobstore 的 Google 文档：
https://developers.google.com/appengine/docs/python/blobstore/
还有一些关于相同的问题
Google App Engine (Python) - Uploading a file (image)
Html form submit both datastore entity and blobstore through app engine
How to upload a file using the BlobStore in Python App Engine?
但我无法让文件上传和输入字段以单个表单传递所有内容以进行处理（代码和错误如下），并且它也没有进入 Blobstore。
newpost.html
<form method="post" action="/upload" role="form" enctype="multipart/form-data">
<div class="col-xs-6">
<div class="form-group">
<label for="title"><h2><small>Enter Title of this Post</small></h2>
<input type="text" name="subject" value="{{ subject }}" class="form-control">
</label>
</div>
</div>
<div class="pull-right">
<div class="form-group">
<label for="exampleInputFile">File upload (Optional)</label>
<input type="file" id="uploadFile" name="uploadFile">
<p class="help-block">
You are responsible for copyrighted or inappropriate files that you upload.</p>
</div>
<hr><hr>
<img src="../img/powered_by.png" width="200" alt="logo" class="img-rounded">
</div>
<div class="col-xs-6">
<label for="art"><h2><small>Enter Post</small></h2></label>
<div class="input-group">
<textarea name="content" class="form-control input-lg">{{ content }}</textarea>
<span class="input-group-addon input-group-btn">
<button type="submit" class="btn btn-danger btn-lg">Submit</button>
</span>
</div>
<div style="color:red">{{ error }}</div>
</div>
</form>
weblog.py
class PixHandler(webapp2.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> <input type="submit"
## name="submit" value="Submit"> </form></body></html>""")
class UploadHandler(blobstore_handlers.BlobstoreUploadHandler):
def post(self):
upload_files = self.get_uploads('uploadFile') # from upload field in the form
blob_info = upload_files[0]
tag = '/pic/%s' % blob_info.key()
servePic = BlogPosts(imageTag = tag) # BlobStore entry
subject = self.request.get("subject")
content = self.request.get("content")
query = self.request.get("rname")
if (query):
self.render_query()
elif subject and content:
msg = "Looks good"
entry = BlogPosts(subject = subject, content = content)
entry_key = entry.put()
permalink = entry_key.id()
self.redirect("./%s" % str(permalink))
elif (not subject and not content):
msg = "Neither box can be empty"
self.render_html(subject, content, msg)
self.redirect(tag) # serves pix with unique id in url
class ServeHandler(blobstore_handlers.BlobstoreDownloadHandler):
def get(self, resource):
resource = str(urllib.unquote(resource))
blob_info = blobstore.BlobInfo.get(resource)
self.send_blob(blob_info)
HTTP 错误：
File "C:\Python27\udacity-web-app-rs-1\weblog.py", line 101, in post
blob_info = upload_files[0]
IndexError: list index out of range
它没有进入重定向页面（进入 HTTP 错误页面）。此外，image key() 没有进入我为其设置的 Datastore 值
处理是使用UploadHandler从表单到/upload。
编辑：
我意识到有些代码与这些问题无关。没有改变问题。
【问题讨论】：
标签： python google-app-engine python-2.7 google-cloud-datastore blobstore