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20140306 (Thursday, 06 March 2014)
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The `mergedata` django-admin command
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The new :term:`django-admin command` :manage:`mergedata` takes the full name of
a python module as argument. It then imports this module and expects
it to define a function `objects` in its global namespace. It calls
this function and expects it to yield a series of Django instance
objects which have not yet been saved. It then compares these objects
with the "corresponding data" in the database and prints a summary to
stdout. It then suggests to merge the new data into the database.

- It never *deletes* any stored records.
- All incoming objects *either* replace an existing (stored) object, *or*
  will be added to the database.
- If an incoming object has a non-empty primary key, then it replaces
  the corresponding stored object. Otherwise, if the model has
  `unique` fields, then these cause potential replacement.


Upgrade in Châtelet
-------------------

- :mod:`lino.modlib.statbel.fixtures.inscodes` now gives more helpful
  error report when `Place.MultipleObjectsReturned` occurs.

- ``props`` was lacking in the :setting:`demo_fixtures` of
  :mod:`lino_welfare.settings.fr`.

- translations



sphinx-build gettext very slow
------------------------------

I want to write and maintain multilingual end-user documentation for
my software applications using "sphinx-build gettext".  For example,
here is the source of one of my doctrees:
https://gitlab.com/lino-framework/lino-welfare/tree/master/userdocs

I noticed that, already on a medium-sized doctree, a build can become
very slow. By inserting print statements at different places I found
out that the slowness is due to the calculations done in
`sphinx.versioning` (called by `Environment.read_doc`) where it merges
doctrees for each document.

Is there hope that I can get it accelerated?  Am I doing something
wrong?



'module' object has no attribute 'CoachingEvents'
-------------------------------------------------

Fixed a bug: Trying to get a `welfare.integ.ActivityReport`
failed with an AttributeError 'module' object has no attribute
'CoachingEvents'.


Also fixed another bug "ERROR 'NoneType' object has no attribute
'PendingCourseRequests'" which occured only when courses not
installed.