You should try to downgrade tgext.tagging,
tgapp-smallpress has been deprecated in favor of
https://bitbucket.org/axant/tgapp-turbopress which has also support for
mongodb.

It looks like tgapp-smallpress is not compatible with new tgext.tagging
version, so downgrading tgext.tagging should probably solve your issue.


On Thu, Feb 19, 2015 at 7:45 PM, Antonio Fregoso <
[email protected]> wrote:

>
>
> Hello again
>
> I'm using this solution
>
>
> tgext.tagging relies heavily on ``SAVEPOINT`` to correctly handle
> tagging uniqueness. The default SQLite behaviour is incompatible
> with savepoints and requires some additional changes which are not
> required when working with MySQL or Postgres.
>
> Usually to make SQLite and zope.sqlalchemy properly behave the following
> code
> is required before using your models::
>
>     from sqlalchemy import event
>
>     @event.listens_for(engine, "connect")
>     def do_connect(dbapi_connection, connection_record):
>         # Disable SQLITE automatic transactions
>         dbapi_connection.isolation_level = None
>
>     @event.listens_for(engine, "begin")
>     def do_begin(conn):
>         # Manually emit SQLITE transaction begin
>         conn.execute("BEGIN")
>
>     # Tell zope.sqlalchemy that SQLITE now supports SAVEPOINT
>     from zope.sqlalchemy import datamanager
>     datamanager.NO_SAVEPOINT_SUPPORT = set()
>
> but it's sendig this error now>
>
>  PlugTagging.plug of <tgext.tagging.PlugTagging object at 0x7f25d1636950>>
> at startup: name 'engine' is not defined
>
>
>
>
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