Tuesday, November 3, 2015

I merged Hamza’s work on #38 into master:

$ git status
On branch master
Your branch is up-to-date with 'origin/master'.

nothing to commit, working directory clean

$ git pull hamza
remote: Counting objects: 21, done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 21 (delta 13), reused 13 (delta 13), pack-reused 1
Unpacking objects: 100% (21/21), done.
From https://github.com/HamZuS/lino
   fe9d720..957081f  master     -> hamza/master
You asked to pull from the remote 'hamza', but did not specify
a branch. Because this is not the default configured remote
for your current branch, you must specify a branch on the command line.

$ git merge hamza/master
Updating e6be990..957081f
 docs/tutorials/addrloc/index.rst             | 10 +++--
 docs/tutorials/de_BE/index.rst               | 12 ++++--
 docs/tutorials/mldbc/index.rst               | 10 +++--
 docs/tutorials/polls/mysite/index.rst        | 24 +++++++-----
 docs/tutorials/sendchanges/index.rst         |  8 ++--
 docs/tutorials/watch_tutorial/index.rst      | 11 +++---
 lino/api/doctest.py                          |  5 ++-
 lino/api/shell.py                            |  4 ++
 lino/core/choicelists.py                     |  7 +++-
 lino/core/requests.py                        |  3 +-
 lino/core/site.py                            | 55 +++++++++++++++++++++-------
 lino/modlib/countries/fixtures/few_cities.py | 26 +++++++++++--
 lino/modlib/jinja/loader.py                  |  6 ++-
 lino/utils/instantiator.py                   |  5 ++-
 14 files changed, 133 insertions(+), 53 deletions(-)

After merging these, I get an error when running fab initdb under Django 1.6:

Creating table tinymce_textfieldtemplate
Creating table django_session
Installing custom SQL ...
Installing indexes ...
INFO Loading /lino/lino/modlib/cal/fixtures/std.py...
Traceback (most recent call last):
  File "/py27/bin/django-admin.py", line 5, in <module>
  File "/lino/lino/modlib/cal/fixtures/std.py", line 82, in objects
    if not obj.update_reminders(ar):
  File "/lino/lino/modlib/cal/mixins.py", line 295, in update_reminders
    return self.update_auto_events(ar)
  File "/lino/lino/modlib/cal/mixins.py", line 309, in update_auto_events
    wanted = self.get_wanted_auto_events(ar)
  File "/lino/lino/modlib/cal/mixins.py", line 461, in get_wanted_auto_events
    date = rset.get_next_suggested_date(ar, date)
  File "/lino/lino/modlib/cal/mixins.py", line 658, in get_next_suggested_date
    date = self.every_unit.add_duration(date, self.every)
AttributeError: Problem installing fixture '/lino/lino/modlib/cal/fixtures/std.py': 'unicode' object has no attribute 'add_duration'
INFO Done /py27/bin/django-admin.py initdb_demo --noinput --traceback --settings=lino.projects.docs.settings.demo (PID 7246)
Fatal error: local() encountered an error (return code 1) while executing 'django-admin.py initdb_demo --noinput --traceback --settings=lino.projects.docs.settings.demo'

Hm… what’s going on there? Aha, the problem is caused by two changes in lino.core.choicelists. Hamza, in ChoiceList.to_python and ChoiceListField.get_prep_value you told Lino to return the value (i.e. a string) instead of the Choice instance. I guess that this change is not what we want, and therefore undid it. But maybe I am missing something. Please explain why you did it.

Testing output which depends on Django version

In Using mldbc with different variants of a same language, Hamza found a really tricky solution to a doctest problem.

>>> from django.core.management import call_command
>>> call_command('initdb_demo', interactive=False)

Under Django 1.6 the output of that snippet is:

Creating tables ...
Installing custom SQL ...
Installing indexes ...
Installed 3 object(s) from 1 fixture(s)

While under Django 1.7+ it is:

Operations to perform:
  Synchronize unmigrated apps: about, jinja, staticfiles, de_BE, lino_startup, extjs, bootstrap3
  Apply all migrations: (none)
Synchronizing apps without migrations:
  Creating tables...
    Running deferred SQL...
  Installing custom SQL...
Running migrations:
  No migrations to apply.
Installed 3 object(s) from 1 fixture(s)

That’s a funny challenge if you want to support both Django versions! His hack was this:

>>> call_command('initdb_demo', interactive=False, verbosity=0)
>>> import doctest
>>> doctest.ELLIPSIS_MARKER = '-etc-'
>>> call_command('initdb_demo', interactive=False)  
-etc-Creating tables-etc-...
-etc-Installing custom SQL-etc-...
Installed 3 object(s) from 1 fixture(s)

That’s a cool trick to remember, but I found an even cooler solution:

>>> call_command('initdb_demo', interactive=False, verbosity=0)

That is, I use the verbosity option so that the command does no output at all. This is okay because actually the whole test case is not about the details of that output. The output is just a side effect.

Same for The AddressLocation mixin.

I adapted some tests in Lino Welfare to recent changes in lino_cosi.lib.sepa.