exporting song

[Tsvetan Stoitsev]

Kubuntu 12.10
OpenLP 2.0
It gieves me an erorr masage when I try to export a song. Song exporting wizart don't start at all.

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/openlp/plugins/songs/songsplugin.py", line 167, in onSongExportItemClicked
    self.mediaItem.onExportClick()
  File "/usr/lib/pymodules/python2.7/openlp/plugins/songs/lib/mediaitem.py", line 383, in onExportClick
    self.exportWizard.exec_()
  File "/usr/lib/pymodules/python2.7/openlp/core/ui/wizard.py", line 170, in exec_
    self.setDefaults()
  File "/usr/lib/pymodules/python2.7/openlp/plugins/songs/forms/songexportform.py", line 257, in setDefaults
    cmp=locale_direct_compare, key=lambda song: song.sort_string)
  File "/usr/lib/pymodules/python2.7/openlp/plugins/songs/forms/songexportform.py", line 257, in <lambda>
    cmp=locale_direct_compare, key=lambda song: song.sort_string)
AttributeError: 'Song' object has no attribute 'sort_string'

[Derek Robin Chambers (derek-chambers)]

I get the same on 64-bit windows 7 machine:

**OpenLP Bug Report**
Version: {u'full': u'2.0', u'version': u'2.0', u'build': None}

--- Details of the Exception. ---

Start OpenLP 2.0 on freshly booted 64-bit Windows 7 machine and click File>Export>Song
Appears rock-solid repeatable

 --- Exception Traceback ---
Traceback (most recent call last):
  File "C:\Program Files (x86)\OpenLP\plugins\songs\songsplugin.py", line 167, in onSongExportItemClicked
    self.mediaItem.onExportClick()
  File "D:\OpenLP_Code\release-2.0\build\pyi.win32\OpenLP\out00-PYZ.pyz\openlp.plugins.songs.lib.mediaitem", line 383, in onExportClick
  File "D:\OpenLP_Code\release-2.0\build\pyi.win32\OpenLP\out00-PYZ.pyz\openlp.core.ui.wizard", line 170, in exec_
  File "D:\OpenLP_Code\release-2.0\build\pyi.win32\OpenLP\out00-PYZ.pyz\openlp.plugins.songs.forms.songexportform", line 257, in setDefaults
  File "D:\OpenLP_Code\release-2.0\build\pyi.win32\OpenLP\out00-PYZ.pyz\openlp.plugins.songs.forms.songexportform", line 257, in <lambda>
AttributeError: 'Song' object has no attribute 'sort_string'

--- System information ---
Platform: Windows-7-6.1.7601-SP1

--- Library Versions ---
Python: 2.7.3
Qt4: 4.7.3
Phonon: 4.4.0
PyQt4: 4.8.5
QtWebkit: 533.3
SQLAlchemy: 0.7.7
SQLAlchemy Migrate: 0.7.2
BeautifulSoup: 3.2.1
lxml: 2.3.0
Chardet: 1.0.1
PyEnchant: 1.6.5
PySQLite: 1.0.1
Mako: 0.7.0
pyUNO bridge: -

I am attaching my debug log

[Derek Robin Chambers (derek-chambers)]

Backstep to 1.9.12; no other change to machine: Problem disappears.