pymongo 3.0

[Garito]

Hi!
I would like to update pymongo to 3.0
Did you know when will be flask-mongoengine ready to do so?
As soon as I update it I raises and error
I've tryed to install masters versions of mongoengine (proposed by the people in charge) and yours but the errors is still there
Let me put the traceback here to:

127.0.0.1 - - [04/Jun/2015 17:54:34] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask_debugtoolbar/__init__.py", line 125, in dispatch_request
    return view_func(**req.view_args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/cProfile.py", line 149, in runcall
    return func(*args, **kw)
  File "/Users/garito/TimeFounder/App/0.3/TimeFounder/__init__.py", line 207, in root
    return tree('', 'view')
  File "/Users/garito/TimeFounder/App/0.3/TimeFounder/__init__.py", line 274, in tree
    return abort(404) if method is None else method(obj)
  File "/Users/garito/TimeFounder/App/0.3/TimeFounder/models/section.py", line 84, in view
    if current_user in self.leaders and current_user == self.leaders[0]:
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/mongoengine/base/fields.py", line 245, in __get__
    name=self.name
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/mongoengine/dereference.py", line 78, in __call__
    self.object_map = self._fetch_objects(doc_type=doc_type)
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/mongoengine/dereference.py", line 143, in _fetch_objects
    for ref in references:
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/pymongo/cursor.py", line 983, in next
    if len(self.__data) or self._refresh():
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask_mongoengine/operation_tracker.py", line 168, in _cursor_refresh
    snapshot = privar("snapshot")
  File "/Users/garito/TimeFounder/App/0.3/env/lib/python2.7/site-packages/flask_mongoengine/operation_tracker.py", line 136, in privar
    return getattr(cursor_self, '_Cursor__{0}'.format(name))
AttributeError: 'Cursor' object has no attribute '_Cursor__snapshot'

Any ideas?

Thanks!

[Garito]

Anyone here?

[rozza]

I'm not sure that mongoengine support for pymongo 3.0 has been released yet.

[Garito]

They are waiting for us in that matter... I'm asking here as a suggestion from them

[Garito]

MongoEngine/mongoengine#1008

[Garito]

Since mongoengine has updated its dependencies to pymongo 3.0 this extension doesn't work anymore

[rozza]

Currently, you'd have to lock mongoengine versions until someone from the community investigates and fixes the issue.

This project open source and as such is looking for active users from the community to step up and become maintainers.

[Garito]

I know and understand open source but here we need to be honest and if this volutaries don't show up more soon than later will be better that someone put a huge warning telling this extension is out of date

We, as open source users, need to be patience but open source creators need to be honest since the users are making a de facto contract of trust when they choose to use the piece of software

[mgellesch]

If you change the line in flask_mongoengine/operation_tracker.py from
snapshot = privar("snapshot")
to snapshot = '' it works. Dirty hack, but ok. The privar approach certainly does seem a little unconventional

[rochacbruno]

The solution is to change the line 140 of operation_tracker.py

from

    def privar(name):
        return getattr(cursor_self, '_Cursor__{0}'.format(name))

to

    def privar(name):
        return getattr(cursor_self, '_Cursor__{0}'.format(name), None)

I am sending the PR