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

[user]

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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36

System Information

Trac	1.2.2
Babel	0.9.6
Genshi	0.6 (without speedups)
GIT	2.14.1.windows.1
mod_wsgi	3.5 (WSGIProcessGroup WSGIApplicationGroup %{GLOBAL})
pysqlite	2.6.3
Python	2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 20:19:30) [MSC v.1500 32 bit (Intel)]
setuptools	20.9.0
SQLite	3.7.6.2
jQuery	1.11.3
jQuery UI	1.11.4
jQuery Timepicker	1.5.5

Enabled Plugins

tracusermanagerplugin

0.5.dev0

Interface Customization

Python Traceback

Traceback (most recent call last):
  File "build\bdist.win32\egg\trac\web\main.py", line 623, in _dispatch_request
    dispatcher.dispatch(req)
  File "build\bdist.win32\egg\trac\web\main.py", line 239, in dispatch
    resp = chosen_handler.process_request(req)
  File "build\bdist.win32\egg\trac\admin\web_ui.py", line 109, in process_request
    provider.render_admin_panel(req, cat_id, panel_id, path_info)
  File "build\bdist.win32\egg\tracusermanager\admin.py", line 124, in render_admin_panel
    um_data.update(users = UserManager(self.env).get_active_users())
  File "build\bdist.win32\egg\tracusermanager\api.py", line 172, in get_active_users
    return self.search_users()
  File "build\bdist.win32\egg\tracusermanager\api.py", line 215, in search_users
    for username in self.user_store.search_users()]
  File "build\bdist.win32\egg\tracusermanager\api.py", line 321, in search_users
    db = self.env.get_db_cnx()
AttributeError: 'Environment' object has no attribute 'get_db_cnx'

[Jun Omae]

PluginIssue (​th:UserManagerPlugin).