Kay Crashing after heavy deferred task jobs

[someone1]

I have a site that i'm building that seems to run fine. I recently
setup a deferred task job that fan outs and aggregates a decent amount
of data (6000-10000 entries of about 2-4KB each) and writes to a
model, lets call this ModelA. On every page load on the main, I do a
lookup on the data store to a model, lets call this one ModelB.
Nothing in ModelA or ModelB references one another, they aren't
parents of one another, or anything of that sort. I can load the main
site just fine after doing an appcfg update, however, after running
that deferred task and trying to load a page again I get the following
issue:

File "[...]/kay/__init__.py", line 177, in kind
return cls._meta.db_table

AttributeError: type object 'ModelA' has no attribute '_meta'

I have to do another "update" via appcfg before my app becomes usable
again. Is this an issue with my app or within kay? Again, it used to
work fine before I implemented that deferred task.

Thanks,
Prateek

[someone1]

I forgot to mention i have the disabled adding the application name
prefix to my models.

Thanks.

[Ian Lewis]

Hi,

The reason for this is that kay monkey patches the db.Model class. I'm
assuming that if you are getting this
error you are running an application that is not a kay application
(i.e. not using kay's main method).e

You need to add the following code to the top of the main module of your app:

import kay
kay.setup()

After that it should patch the db.Model class and work for you.

Thanks,
Ian

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[someone1]

Thanks for your reply, but I believe I am using a kay application. I
followed the getting started guide and everything. Like I previously
mentioned, the app works fine until I run the deferred task (which
again, doesn't write to the model I call upon in my kay application).

urls.py:
###############################
from kay.routing import (
ViewGroup, Rule
)

view_groups = [
ViewGroup(
Rule('/', endpoint='index', view='appnameremoved.views.index'),
Rule('/listings/<username>', endpoint='listing',
view='appnameremoved.listings.listings'),
)
]
###############################

listings.py:
###############################
[INCLUDES]
class ListingsHandler(kay.handlers.BaseHandler):
def get(self, username=None):
if username:
user = ModelB.all().filter("user_id", username).get()
[CODE TRUNCATED]
listings = ListingsHandler()
###############################

This little bit is where it crashes. Is this not a valid kay
application? I thought this was working through kay since before i set
ADD_APP_PREFIX_TO_KIND = False, my model names were prefixed with my
appname.

Please let me know if I'm not following this correctly!

Thank you,
Prateek

> > For more options, visit this group athttp://groups.google.com/group/kay-users?hl=en.
>
> --
> Ian
>
> http://www.ianlewis.org/

[Takashi Matsuo]

Hi someone1,

I'll remove this harmful and unprofitable monckey-patched feature shortly, so how about just comment out the following line in kay.__init__.py?

  db.Model.kind = kind

It will definitely solve your issue.

Actually I strongly regret that I incorporated this feature. 

Hope it helps.

-- 
Takashi Matsuo
matsuo....@gmail.com
Kay's daddy