AttributeError: 'Environment' object has no attribute 'get_db_cnx'

[admin]

How to Reproduce

While doing a GET operation on /admin/accounts/users, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'cat_id': u'accounts', 'panel_id': u'users', 'path_info': None}

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:32.0) Gecko/20100101 Firefox/32.0

System Information

Trac	1.1.2beta1
Genshi	0.7 (with speedups)
Pygments	1.6
pysqlite	2.6.0
Python	2.7.6 (default, Mar 22 2014, 22:59:56) [GCC 4.8.2]
pytz	2012c
setuptools	3.3
SQLite	3.8.2
Subversion	1.8.8 (r1568071)
jQuery	1.8.3
jQuery UI	1.9.2
jQuery Timepicker	1.1.1

Enabled Plugins

TracAccountManager

0.5dev-r14078

Python Traceback

Traceback (most recent call last):
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 550, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 224, in dispatch
    resp = chosen_handler.process_request(req)
  File "build/bdist.linux-x86_64/egg/trac/admin/web_ui.py", line 119, in process_request
    path_info)
  File "build/bdist.linux-x86_64/egg/acct_mgr/admin.py", line 231, in render_admin_panel
    return self._do_users(req)
  File "build/bdist.linux-x86_64/egg/acct_mgr/admin.py", line 983, in _do_users
    filters)))
  File "build/bdist.linux-x86_64/egg/acct_mgr/admin.py", line 69, in fetch_user_data
    authenticated=None).iteritems():
  File "build/bdist.linux-x86_64/egg/acct_mgr/model.py", line 494, in get_user_attribute
    db = _get_db(env, db)
  File "build/bdist.linux-x86_64/egg/acct_mgr/model.py", line 661, in _get_db
    return db or env.get_db_cnx()
AttributeError: 'Environment' object has no attribute 'get_db_cnx'

[Steffen Hoffmann]

This is much lesser informative, but essentially the same as #11915.

I'm currently working on this major upstream compatibility issue, and there is probably not much more to do than look and use Jun's valuable contribution, if you insist on a solution right now.