AttributeError: 'NoneType' object has no attribute 'realm'

[joakim]

How to Reproduce

This happens when I have ​th:TracVote enabled and trying to access anything related with attachments. If I disable the ​th:TracVote, everything works beautifully

TracIni settings

[components]
tracvote.* = enabled

[vote]
paths = *

While doing a GET operation on /attachment/wiki/Page_Name/Image 09.jpg, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'path': u'Page/SubPage/Image 09.jpg', 'realm': u'wiki'}

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0

System Information

Trac	1.2.2
Babel	2.5.1
dnspython	1.15.0
Docutils	0.12
FullBlog	0.1.6.3
Genshi	0.7 (with speedups)
httplib2	0.10.3
mod_python	3.3.1
Pillow	4.3.0
Pygments	2.1.3
pysqlite	2.6.0
Python	2.7.12+ (default, Sep 17 2016, 12:08:02) [GCC 6.2.0 20160914]
python-oauth2	1.9.0.post1
pytz	2017.2
setuptools	36.6.0
SpamBayes	1.1b2
SQLite	3.14.1
jQuery	1.11.3
jQuery UI	1.11.4
jQuery Timepicker	1.5.5

Enabled Plugins

TracFullBlogPlugin	0.1.6.3
TracSpamFilter	1.2.0
TracTags	0.9
TracVote	0.6.0

Interface Customization

Python Traceback

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/trac/web/main.py", line 623, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/local/lib/python2.7/dist-packages/trac/web/main.py", line 249, in dispatch
    self._post_process_request(req, *resp)
  File "/usr/local/lib/python2.7/dist-packages/trac/web/main.py", line 453, in _post_process_request
    resp = f.post_process_request(req, *resp[:-1])
  File "/usr/local/lib/python2.7/dist-packages/tracvote/__init__.py", line 401, in post_process_request
    resource = resource_from_path(self.env, req.path_info)
  File "/usr/local/lib/python2.7/dist-packages/tracvote/__init__.py", line 97, in resource_from_path
    if _resource_exists(env, resource) in (None, True):
  File "/usr/local/lib/python2.7/dist-packages/tracvote/__init__.py", line 78, in _resource_exists
    return resource_exists(env, resource)
  File "/usr/local/lib/python2.7/dist-packages/trac/resource.py", line 469, in resource_exists
    return manager.resource_exists(resource)
  File "/usr/local/lib/python2.7/dist-packages/trac/attachment.py", line 386, in resource_exists
    attachment = Attachment(self.env, resource)
  File "/usr/local/lib/python2.7/dist-packages/trac/attachment.py", line 683, in __init__
    self.parent_realm = resource.parent.realm
AttributeError: 'NoneType' object has no attribute 'realm'

[Jun Omae]

PluginIssue.

[Ryan J Ollos]

Please ask on the MailingList. There are potentially a few things to discuss around your configuration.