==================================
20131018 (Friday, 18 October 2013)
==================================

Lino Faggio
===========

Continued on yesterday's "To-Do-Liste Sven" (:blogref:`20131017`).

- The `cal.Calendar` model is back. I had replaced it by a system of 
  subscriptions where each user could define application-specific 
  filter criteria per Subscription. This resulted in a system where it was 
  possible for an Event to appear in different Calendars.
  Which would have been nice, but the problem with that idea is 
  that `Ext.ensible.CalendarPanel` isn't designed for it, it wants 
  a list of calendars and each Event pointing to exactly one of them.
  
  So I return back to *almost* the old system
  (and that "almost" is what Lino has learned):
  `cal.Event` has no direct FK to Calendar, but a `get_calendar` method.
  And 
  :ref:`welfare` users see one Calendar per `User`
  while
  :ref:`faggio` users see one Calendar per `Room`.


- Updated the :ref:`welfare` test suite to several recent changes.

- New item "Once" in Recurrences.

- insert_layout for `courses.Line`
- New field courses.Line every_unit (Recurrences)



Split up :mod:`lino_xl.lib.cal` into more digestable chunks:
:mod:`models_task <lino_xl.lib.cal.models_task>`
:mod:`models_guest <lino_xl.lib.cal.models_guest>`
:mod:`models_event <lino_xl.lib.cal.models_event>`
:mod:`models_calendars <lino_xl.lib.cal.models_calendar>`

In a first checkin I had tried to turn
:mod:`lino_xl.lib.cal`
into a package containing the above files.
But that would require me to add an explicit `app_label
<https://docs.djangoproject.com/en/5.0/ref/models/options/#app-label>`_
(the feature that app_label "is no longer required for models that are 
defined in a models package within an app" is only available in the 
development version).


I also did the mistake of naming them 
``task``,
``guest``,
``event`` and
``calendar`` in a first go.
And didn't notice that a module called 
`calendar <http://docs.python.org/2.7/library/calendar.html#module-calendar>`_
is part of the Python standard library.
The funny thing was that this bomb didn't explode in the Lino test suite, 
only in :ref:`welfare`::

    Traceback (most recent call last):
      File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
        "__main__", fname, loader, pkg_name)
      File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
        exec code in run_globals
      File "/home/luc/hgwork/atelier/atelier/doctest_utf8.py", line 52, in <module>
        sys.exit(_test())
      File "/home/luc/hgwork/atelier/atelier/doctest_utf8.py", line 38, in _test
        m = __import__(filename[:-3])
      File "lino/modlib/cal/utils.py", line 31, in <module>
        from north.utils import to_locale
      File "/home/luc/hgwork/north/north/__init__.py", line 16, in <module>
        from north.site import Site
      File "/home/luc/hgwork/north/north/site.py", line 10, in <module>
        from djangosite import Site, DJANGO_DEFAULT_LANGUAGE, assert_django_code
      File "/home/luc/hgwork/site/djangosite/__init__.py", line 36, in <module>
        from atelier.utils import AttrDict, ispure
      File "/home/luc/hgwork/atelier/atelier/utils.py", line 17, in <module>
        from dateutil import parser as dateparser
      File "/home/luc/pythonenvs/py27/local/lib/python2.7/site-packages/dateutil/parser.py", line 26, in <module>
        from . import relativedelta
      File "/home/luc/pythonenvs/py27/local/lib/python2.7/site-packages/dateutil/relativedelta.py", line 10, in <module>
        import calendar
      File "lino/modlib/cal/calendar.py", line 27, in <module>
        from django.db import models
      File "/home/luc/pythonenvs/py27/local/lib/python2.7/site-packages/django/db/__init__.py", line 11, in <module>
        if settings.DATABASES and DEFAULT_DB_ALIAS not in settings.DATABASES:
      File "/home/luc/pythonenvs/py27/local/lib/python2.7/site-packages/django/conf/__init__.py", line 53, in __getattr__
        self._setup(name)
      File "/home/luc/pythonenvs/py27/local/lib/python2.7/site-packages/django/conf/__init__.py", line 48, in _setup
        self._wrapped = Settings(settings_module)
      File "/home/luc/pythonenvs/py27/local/lib/python2.7/site-packages/django/conf/__init__.py", line 132, in __init__
        mod = importlib.import_module(self.SETTINGS_MODULE)
      File "/home/luc/pythonenvs/py27/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
        __import__(name)
      File "lino/__init__.py", line 79, in <module>
        from .site import Site
      File "lino/site.py", line 103, in <module>
        from lino.utils.xmlgen import html as xghtml
      File "lino/utils/__init__.py", line 60, in <module>
        from atelier.utils import AttrDict, iif, ispure, assert_pure, confirm
    ImportError: cannot import name AttrDict

An interesting example of a subtle pitfall!



Citadel
=======


Oops, it seems that citadel caused some trouble to my mailman
configuration...

::

    (demo)luc@vps:~$ sudo aptitude purge citadel-server

    The following packages will be REMOVED:  
      citadel-server{p} 
    0 packages upgraded, 0 newly installed, 1 to remove and 40 not upgraded.
    Need to get 0 B of archives. After unpacking 2,470 kB will be freed.
    Do you want to continue? [Y/n/?] 
    (Reading database ... 44499 files and directories currently installed.)
    Removing citadel-server ...
    .Purging configuration files for citadel-server ...
    /var/lib/citadel/data not removed, as it may contain your personal data.
    dpkg: warning: while removing citadel-server, directory '/var/spool/citadel/network' not empty so not removed.
    dpkg: warning: while removing citadel-server, directory '/var/spool/citadel' not empty so not removed.
    dpkg: warning: while removing citadel-server, directory '/var/lib/citadel/data' not empty so not removed.
    dpkg: warning: while removing citadel-server, directory '/var/lib/citadel' not empty so not removed.
    Processing triggers for man-db ...




    (demo)luc@vps:~$ sudo rm -R /var/spool/citadel
    (demo)luc@vps:~$ sudo rm -R /var/lib/citadel

    (demo)luc@vps:~$ sudo aptitude purge libcitadel2


    (demo)luc@vps:~$ sudo tail -f /var/log/mail.log
    (demo)luc@vps:~$ sudo /etc/init.d/postfix restart


    Oct 18 14:15:28 vps postfix/local[18004]: EB4F42A2502: to=<www-data@lino-framework.org>, orig_to=<www-data>, relay=local, delay=1319126, delays=1319126/0/0/0.01, dsn=2.0.0, status=sent (delivered to command: procmail -a "$EXTENSION")
    Oct 18 14:15:28 vps postfix/qmgr[15874]: EB4F42A2502: removed
    Oct 18 14:15:29 vps postfix/pickup[15873]: F07572A24F9: uid=33 from=<www-data>
    Oct 18 14:15:29 vps postfix/cleanup[18044]: F07572A24F9: message-id=<20131018101528.F07572A24F9@lino-framework.org>
    Oct 18 14:15:29 vps postfix/qmgr[15874]: F07572A24F9: from=<www-data@lino-framework.org>, size=985, nrcpt=1 (queue active)
    Oct 18 14:15:29 vps postfix/local[18046]: EFBF02A24D2: to=<www-data@lino-framework.org>, orig_to=<www-data>, relay=local, delay=23727, delays=23727/0.01/0/0.01, dsn=2.0.0, status=sent (delivered to command: procmail -a "$EXTENSION")
    Oct 18 14:15:29 vps postfix/qmgr[15874]: EFBF02A24D2: removed
    Oct 18 14:15:29 vps postfix/local[18089]: F07572A24F9: to=<www-data@lino-framework.org>, orig_to=<www-data>, relay=local, delay=755726, delays=755726/0/0/0, dsn=2.0.0, status=sent (delivered to command: procmail -a "$EXTENSION")
    Oct 18 14:15:29 vps postfix/qmgr[15874]: F07572A24F9: removed
    Oct 18 14:15:35 vps postfix/local[16188]: 2DBCD2A3BB9: to=<www-data@lino-framework.org>, orig_to=<www-data>, relay=local, delay=649533, delays=649499/0.65/0/33, dsn=2.0.0, status=sent (delivered to command: procmail -a "$EXTENSION")
    Oct 18 14:15:35 vps postfix/qmgr[15874]: 2DBCD2A3BB9: removed


    (demo)luc@vps:~$ sudo /etc/init.d/mailman restart


    (demo)luc@vps:~$ sudo less /var/log/mailman/vette

    Oct 17 15:43:31 2013 (5058) kakoor: Discarded posting:
            From: dtuulik@gmail.com
            Subject: Re: Kontsertreis Saksamaale 23.-30. sept. 2013
            Reason: Palun l<FC>henda adressaatide nimekirja: see on liiga pikk.
    Oct 17 15:44:18 2013 (5061) kakoor: Discarded posting:
            From: reet.lend@ksg.edu.ee
            Subject: =?iso-8859-15?Q?Proov_8.10_ja_laulmine_L=F5ikust=E4nup=FChal_13.10?=
            Reason: Kiri oli liiga suur; palun l<FC>hendage seda nii, et see oleks v<E4>iksem kui 40 KB.
    /var/log/mailman/vette (END) 


Sent a test mail to kakoor::


    /var/log/mailman/error shows:

    Oct 18 14:23:09 2013 (18198) send_digests() failed: [Errno 13] Permission denied
    : '/var/lib/mailman/archives/private/kakoor/attachments'
    Oct 18 14:23:10 2013 (18195) Archive file access failure:
            /var/lib/mailman/archives/private/kakoor.mbox/kakoor.mbox [Errno 13] Permission denied: '/var/lib/mailman/archives/private/kakoor.mbox/kakoor.mbox'
    Oct 18 14:23:10 2013 (18195) Uncaught runner exception: [Errno 13] Permission denied: '/var/lib/mailman/archives/private/kakoor.mbox/kakoor.mbox'
    Oct 18 14:23:10 2013 (18195) Traceback (most recent call last):
      File "/var/lib/mailman/Mailman/Queue/Runner.py", line 120, in _oneloop
        self._onefile(msg, msgdata)
      File "/var/lib/mailman/Mailman/Queue/Runner.py", line 191, in _onefile
        keepqueued = self._dispose(mlist, msg, msgdata)
      File "/var/lib/mailman/Mailman/Queue/ArchRunner.py", line 73, in _dispose
        mlist.ArchiveMail(msg)
      File "/var/lib/mailman/Mailman/Archiver/Archiver.py", line 198, in ArchiveMail
        self.__archive_to_mbox(msg)
      File "/var/lib/mailman/Mailman/Archiver/Archiver.py", line 167, in __archive_to_mbox
        mbox = self.__archive_file(afn)
      File "/var/lib/mailman/Mailman/Archiver/Archiver.py", line 155, in __archive_file
        return Mailbox.Mailbox(open(afn, 'a+'))
    IOError: [Errno 13] Permission denied: '/var/lib/mailman/archives/private/kakoor:


    root@vps:/var/log/mailman# ls -al /var/lib/mailman/archives/private/kakoor
    total 12
    drwxrwsr-x 2 root www-data 4096 Jul 30 15:14 .
    drwxrws--- 8 list www-data 4096 Aug 26 15:53 ..
    -rw-rw-r-- 1 root www-data  503 Jul 30 15:14 index.html



    $ sudo new_list pppk
    $ sudo nano /etc/aliases (add aliases as instructed and run)
    $ sudo newaliases

    $ sudo nano /etc/postfix/valias.txt
    $ sudo postmap /etc/postfix/valias.txt