Error when trying to downloading file by clicking on link in Downloads list

[Ilmars Poikans]

I successfully uploaded file in Admin section, there is file created in filesystem, permissions are ok. When I go to Downloads section, I see new file in list, but when I try to download it (click on link), I got:

Trac detected an internal error:

TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'

Python Traceback Most recent call last:

# File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 423, in  _dispatch_request
# File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 197, in dispatch
# File "build/bdist.linux-x86_64/egg/tracdownloads/core.py", line 75, in process_request
# File "build/bdist.linux-x86_64/egg/tracdownloads/api.py", line 276, in process_downloads
# File "build/bdist.linux-x86_64/egg/tracdownloads/api.py", line 378, in _do_action
   Local variables:
   Name	Value
   context 	<Context <Resource 'downloads-core'>>
   download 	{'count': None, 'description': u'Mar\u0137\u0113t\u0101ja 1.0 Beta ...
   download_file 	None
   download_id 	u'1'
   mode 	'get-file'
   modes 	['get-file']
   path 	u'/var/lib/trac/semti/downloads/1/annotator-r422.zip'
   self 	<tracdownloads.api.DownloadsApi object at 0x7f3d0089f250>

System info:

Trac:  	0.11
Python: 	2.5.2 (r252:60911, Oct 5 2008, 19:49:54) [GCC 4.3.2]
setuptools: 	0.6c9
SQLite: 	3.5.9
pysqlite: 	2.4.1
Genshi: 	0.5
mod_python: 	3.3.1
Pygments: 	0.10
Subversion: 	1.5.1 (r32289)
jQuery:	1.2.3

DonloadsPlugin - latest from SVN 0.11 branch (r5548), installed with easy_install <svn url>.

[Radek Bartoň]

Changeset r5587 fixes that problem for newly added downloads. For all already present dowloads do SQL command in DB:

update download set count = 0 where count is null;