HTTP post with GAE (and WTForms)
Hi how can I get the variables in a HTTP post with WTForms when the post is done with a blobstoreuploadhandler and preferably also with i18n localized messages for validation? This is my code that is not working:
class AdForm(Form):
name = TextField(_('Name'))
title = TextField(_('title'))
text = TextAreaField(_('Text'),widget=TextArea())
phonenumber = TextField(_('Phone number'))
phonenumberhide = BooleanField(_('Display phone number on site'))
price = TextField(_('Price'))
password = PasswordField(_('Password'))
email = TextField(_('Email'))
When I try to access the data posted via the form the data turns out as None :
form = AdForm(data=self.request.POST)
if form.title:
logging.info('getting title:'+form.title.data)
ad.title = form.title.data
ad.save()
The above does not save anything to the datastore and this is the template where it's coming from
<div class="labelform">
<div class="labelform" style="clear:left;">
<label> {% filter capitalize %}{% trans %}title{% endtrans %}{% endfilter %}:</label>
</div>
</div>
</td><td>
{{ form.title }}{% if form.title.errors %}
<ul class="errors">{% for error in form.title.errors %}<li>{{ error }}</li>{% endfor %}</ul>
{% endif %}
Can you help me? There's something in the WTForms manual about appengine but I couldn't find a working example.
Update
I added validation tests and I still can't access the variables:
logging.info('getting requests')
if form.validate():
if form.title:
logging.info('getting title:'+form.title.data)
ad.title = form.title.data
ad.save()
ad.put()
Logging output:
INFO 2011-11-05 23:17:24,653 main.py:1504] getting requests INFO
2011-11-05 23:17:24,653 main.py:1507] getting title:
Update 2
I removed the WTForms dependence and it is still not working. The line logging.info('getting data:'+ self.request.get('title', '0')) only outputs 0 even though the form is just a regular http post form:
<form action="{{form_url}}" name="upload" method="post" enctype="multipart/form-data" accept-charset="utf-8">
Update 3
This minimal config with no WTForms and no Jinja works so it's probably something with Jinja when this bare-bones example works with webapp2 and python 2.7 where I'm going to add the faulty code line by line to troubleshoot:
class GuestPage(BaseHandler):
def get(self):
self.response.out.write("""
<html>
<body>
<form action="/sign" method="post">
<div><textarea name="content" rows="3" cols="60"></textarea></div>
<div><input type="submit" value="Sign Guestbook"></div>
</form>
</body>
</html>""")
class Guestbook(BaseHandler, I18NHandler, blobstore_handlers.BlobstoreUploadHandler):
csrf_protect = False
def post(self):
self.response.out.write('<html><body>You wrote:<pre>')
self.response.out.write(self.request.get('content'))
self.response.out.write('</pre></body></html>')
app = webapp2.WSGIApplication([ ('/guest', GuestPage),
('/sign', Guestbook),
...
Update 4
My back to basics is working with Jinja so I suppose I just build on this example and see where it breaks:
class GuestPage(BaseHandler):
def get(self):
self.render_jinja('form_jinja')
class Guestbook(BaseHandler, I18NHandler, blobstore_handlers.BlobstoreUploadHandler):
csrf_protect = False
def post(self):
self.response.out.write('<html><body>You wrote:<pre>')
self.response.out.write(self.request.get('content'))
self.response.out.write('</pre></body></html>')
Update 5
I can reproduce the error with this minimal example that can't access the http post variable:
class GuestPage(webapp2.RequestHandler):
def get(self):
self.response.out.write("""
<html>
<body>
<form action=" """ +blobstore.create_upload_url('/sign')+ """ " method="post">
<div><textarea name="content" rows="3" cols="60"></textarea></div>
<div><input type="submit" value="Sign Guestbook"></div>
</form>
</body>
</html>""")
class Guestbook(blobstore_handlers.BlobstoreUploadHandler):
def post(self):
self.response.out.write('<html><body>You wrote:<pre>')
self.response.out.write(self.request.get('content'))
self.response.out.write('</pre></body></html>')
app = webapp2.WSGIApplication([ ('/guest', GuestPage),
('/sign', Guestbook),
Update 6
From the guestbook example code with blobstoreuploadhandler I can upload a file on the production server so I could make a working example that uses the blobstoreuploadhandler that I will try to build on for my use case.
Update 7
I could get my original code so that everything works except the blob transfer. I suspect a diff between dev_appserver and production that I posted to the google appengine group about. We'll see how it progresses.
Update 8 Here's another common use how nothing works when you add WTForms:
logging.info('getting data:'+ self.request.get('title', '0'))
logging.info('http post data:'+ str(self.request.post))
form = AdForm(formdata=self.request.data)
logging.info('populated form')
logging.info('form data:' + str(form.formdata))
if form.validate():
if form.title:
logging.info('getting title:'+str( form.get('title') ) )
ad.title = form.title.data ad.save() ad.put()
if form.text:
logging.info('getting text:' +str(form.text))
ad.text = form.text.data
if self.request.get('currency'):
ad.currency = self.request.get('currency')
if self.request.get('cg'):
ad.category = form.cg.data
if self.request.get('company_ad') == '1':
ad.company_ad = True
ad.put()
else:
logging.info('form did not validate')
except Exception, ex:
logging.info('there occured exception %s', str(ex))
INFO 2011-11-09 12:11:50,868 main.py:1385] getting data:TEST INFO 2011-11-09 12:11:50,868 main.py:1409] there occured exception post
Update 9
Finally the form populates it just doesn't validate. Thank you Sean for the info that got me further. Now I get past populated the form object with no exception but the exception occurs when I try to validate:
logging.info('getting data:'+ self.request.get('title', '0'))
form = AForm(self.request.POST)
logging.info('populated form')
if form.validate():
logging.info('validated form')
The above code is logging the output:
INFO 2011-11-11 08:03:59,913 main.py:1387] getting data:TEST
INFO 2011-11-11 08:03:59,914 main.py:1390] populated form
INFO 2011-11-11 08:03:59,914 main.py:1412] there occured exception 'builtin_function_or_method' object is not iterable
What does the exception mean?
My form class is
class AForm(Form):
name = TextField(_('Name'))
title = TextField(_('title'))
text = TextAreaField(_('Text'),widget=TextArea())
phonenumber = TextField(_('Phone number'))
phonenumberhide = BooleanField(_('Display phone number on site'))
price = TextField(_('Price'))
password = PasswordField(_('Password'))
email = TextField(_('Email'))
category = SelectField(choices=categories.keys)
I don't know anything about WTForm, but I'd guess that like Django forms, you need to call the validation function before you can access the data. In this case, it's form.validate() :
form = AdForm(formdata=self.request.POST)
if form.validate():
ad.title = form.title.data
Daniel actually it is not data=self.request.POST that you need to pass to the form but formdata instead of data http://wtforms.simplecodes.com/docs/dev/forms.html#the-form-class
hope it will be usefull for all those who rushed through the doc as i did
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