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Monday, March 30, 2015
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Moved Luc's blog out of Lino
============================

This is my first blog entry which will not go to the Lino repository.
As part of the process of decentralizing the Lino development, I moved
my blog out the Lino documentation tree.  It is now available at
http://luc.lino-framework.org.  Updated :lino:`/docs/blog`.



Creating countries
==================

It was not possible to create new :class:`Country
<lino.modlib.countries.models.Country>` objects because these have a
non-numeric primary key.

- Added new
  :attr:`disable_primary_key<lino.core.actions.Action.disable_primary_key>`,
  and :class:`lino.core.store.DisabledFieldsStoreField` uses this.

- :meth:`lino.core.kernel.Kernel.get_generic_related` failed when
  called on an object whose primary key was not integer
  (i.e. AutoField, IntegerField or some subclass thereof)


The type of the primary key
===========================

How to test whether an object's model has a primary key which can be
pointed to using a :ref:`gfk`:

>>> import os
>>> os.environ['DJANGO_SETTINGS_MODULE'] = 'lino.projects.min1.settings.demo'
>>> from django.db import models
>>> from lino.api.shell import *


>>> obj = countries.Country.objects.get(pk='BE')
>>> obj.pk
u'BE'

>>> obj._meta.pk
<django.db.models.fields.CharField: isocode>

>>> GFK_TARGETS = (models.AutoField, models.IntegerField)
>>> isinstance(obj._meta.pk, GFK_TARGETS)
False

>>> isinstance(contacts.Partner._meta.pk, GFK_TARGETS)
True


Duplicate humans
================

Two persons *Norbert Berg* and *Norbert van Berg* should be detected
as similar, but *Norbert van Berg* and *Lydia van Berg* not

Extended :mod:`lino.mixins.humans` and
:mod:`lino_welfare.modlib.dupable_clients.mixins.DupableClient`. Added
test cases in :lino:`/tutorials/human/index`.