mirror of
https://github.com/jazzband/django-eav2.git
synced 2026-03-16 22:40:26 +00:00
73 lines
2.4 KiB
Python
73 lines
2.4 KiB
Python
#!/usr/bin/env python
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#
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# This software is derived from EAV-Django originally written and
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# copyrighted by Andrey Mikhaylenko <http://pypi.python.org/pypi/eav-django>
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#
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# This is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This software is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with EAV-Django. If not, see <http://gnu.org/licenses/>.
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'''
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********
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managers
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********
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Contains the custom manager used by entities registered with eav.
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Functions and Classes
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---------------------
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'''
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from django.db import models
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from .queryset import EavQuerySet
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class EntityManager(models.Manager):
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'''
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Our custom manager, overriding ``models.Manager``
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'''
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_queryset_class = EavQuerySet
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def create(self, **kwargs):
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'''
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Parse eav attributes out of *kwargs*, then try to create and save
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the object, then assign and save it's eav attributes.
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'''
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config_cls = getattr(self.model, '_eav_config_cls', None)
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if not config_cls or config_cls.manager_only:
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return super(EntityManager, self).create(**kwargs)
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#attributes = config_cls.get_attributes()
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prefix = '%s__' % config_cls.eav_attr
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new_kwargs = {}
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eav_kwargs = {}
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for key, value in kwargs.items():
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if key.startswith(prefix):
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eav_kwargs.update({key[len(prefix):]: value})
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else:
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new_kwargs.update({key: value})
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obj = self.model(**new_kwargs)
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obj_eav = getattr(obj, config_cls.eav_attr)
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for key, value in eav_kwargs.items():
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setattr(obj_eav, key, value)
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obj.save()
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return obj
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def get_or_create(self, **kwargs):
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'''
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Reproduces the behavior of get_or_create, eav friendly.
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'''
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try:
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return self.get(**kwargs), False
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except self.model.DoesNotExist:
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return self.create(**kwargs), True
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