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

[denis@…]

How to Reproduce

While doing a POST operation on /ticket/2270, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'__FORM_TOKEN': u'86b3c1e03542852706be1c04',
 'action': u'resolve',
 'action_resolve_resolve_resolution': u'fixed',
 'cnum': u'1',
 'comment': u'',
 'field_billable': u'1',
 'field_blockedby': u'',
 'field_blocking': u'',
 'field_cc': u'',
 'field_checkbox_billable': u'1',
 'field_component': u'ZzZ',
 'field_description': u'test',
 'field_estimatedhours': u'5',
 'field_hours': u'0',
 'field_keywords': u'',
 'field_milestone': u'',
 'field_priority': u'minor',
 'field_reporter': u'denis',
 'field_summary': u'tets ZZZ',
 'field_totalhours': u'0',
 'field_type': u'defect',
 'field_version': u'',
 'id': u'2270',
 'replyto': u'',
 'submit': u'Submit changes',
 'ts': u'2014-10-10 12:27:16.850111+00:00'}

User agent: Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.124 Safari/537.36

System Information

Trac	0.12.3
Babel	1.3 (translations unavailable)
Genshi	0.6.1
pysqlite	2.6.3
Python	2.7.6 (default, May 4 2014, 00:57:49) [GCC 4.9.0]
pytz	2014.7
RPC	1.1.2-r13776
setuptools	6.0.2
SQLite	3.8.3
jQuery	1.4.4

Enabled Plugins

Trac-jsGantt	0.11-r14075
TracMasterTickets	3.0.5dev-r13684
TracXMLRPC	1.1.2-r13776
worklog	0.3dev-r13986

Python Traceback

Traceback (most recent call last):
  File "build/bdist.solaris-2.10-sun4v.32bit/egg/trac/web/main.py", line 522, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.solaris-2.10-sun4v.32bit/egg/trac/web/main.py", line 243, in dispatch
    resp = chosen_handler.process_request(req)
  File "build/bdist.solaris-2.10-sun4v.32bit/egg/trac/ticket/web_ui.py", line 169, in process_request
    return self._process_ticket_request(req)
  File "build/bdist.solaris-2.10-sun4v.32bit/egg/trac/ticket/web_ui.py", line 541, in _process_ticket_request
    self._do_save(req, ticket, action)
  File "build/bdist.solaris-2.10-sun4v.32bit/egg/trac/ticket/web_ui.py", line 1238, in _do_save
    cnum=internal_cnum):
  File "build/bdist.solaris-2.10-sun4v.32bit/egg/trac/ticket/model.py", line 359, in save_changes
    listener.ticket_changed(self, comment, author, old_values)
  File "/opt/csw/lib/python2.7/site-packages/Trac_jsGantt-0.11_r14075-py2.7.egg/tracjsgantt/tracpm.py", line 3058, in ticket_changed
    self.rescheduleTickets(ticket, old_values)
  File "/opt/csw/lib/python2.7/site-packages/Trac_jsGantt-0.11_r14075-py2.7.egg/tracjsgantt/tracpm.py", line 3038, in rescheduleTickets
    self._updateScheduleDB(idle, tickets, profile)
  File "/opt/csw/lib/python2.7/site-packages/Trac_jsGantt-0.11_r14075-py2.7.egg/tracjsgantt/tracpm.py", line 2753, in _updateScheduleDB
    with self.env.db_transaction as db:
AttributeError: 'Environment' object has no attribute 'db_transaction'

[Jun Omae]

PluginIssue (​th:TracJsGanttPlugin).