Monday, March 30, 2015¶
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 /docs/blog.
It was not possible to create new
Country objects because these have a
non-numeric primary key.
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 GenericForeignKey:
>>> 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