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95 | from django.db.models import get_model
from django.contrib.contenttypes.models import ContentType
from datetime import datetime
def proxy_save(sender, **kwargs):
''' Handles the save/update of a Proxy instance. '''
instance = kwargs['instance']
created = kwargs['created']
cls = instance.ProxyMeta
model_str = getattr(cls, 'model_str', 'django_proxy.proxy')
model = get_model(*model_str.split('.'))
#is this is a new instance?
if created:
obj = model()
#does this piece of content care about active state awareness?
if hasattr(cls,'active'):
try:
active_field = getattr(cls, 'active')
objfield = active_field.keys()[0]
active_status = active_field.values()[0]
actual_status = getattr(instance, objfield, None)
if not (active_status == actual_status):
return
except Exception:
#TODO: cleaner exception handling/messaging
pass
obj.content_object = instance
obj.title = getattr(instance, cls.title, None)
obj.description = getattr(instance, cls.description, None)
#pub_date isn't required so confirm
pub_date = getattr(cls, 'pub_date', None)
if pub_date:
obj.pub_date = getattr(instance, cls.pub_date)
#tags aren't required so confirm
tags = getattr(cls, 'tags', None)
if tags:
obj.tags = getattr(instance, cls.tags)
obj.save()
else:
#this instance already exists let's try and grab it's Proxy instance
try:
ctype = ContentType.objects.get_for_model(instance)
obj = model._default_manager.get(object_id=instance.id, content_type=ctype)
except model.DoesNotExist:
obj = model()
obj.content_object = instance
#does this piece of content care about active state awareness?
if obj.id != None and hasattr(cls,'active'):
try:
active_field = getattr(cls, 'active')
objfield = active_field.keys()[0]
active_status = active_field.values()[0]
actual_status = getattr(instance, objfield, None)
if not (active_status == actual_status):
obj.delete()
return
except Exception:
#TODO: cleaner exception handling/messaging
pass
obj.title = getattr(instance, cls.title, None)
obj.description = getattr(instance, cls.description, None)
#proxy pub_date isn't required so confirm
pub_date = getattr(cls, 'pub_date', None)
if pub_date:
obj.pub_date = getattr(instance, cls.pub_date)
#proxy tag isn't require so confirm
tags = getattr(cls, 'tags', None)
if tags:
obj.tags = getattr(instance, cls.tags)
obj.save()
def proxy_delete(sender, **kwargs):
'''Responsible for handling the deletion of any child/associated Proxy records.
Coupled to associated object's post_delete signal.
'''
instance = kwargs['instance']
ctype = ContentType.objects.get_for_model(instance)
cls = instance.ProxyMeta
model_str = getattr(cls, 'model_str', 'django_proxy.proxy')
model = get_model(*model_str.split('.'))
obj = model._default_manager.get(object_id=instance.id, content_type=ctype)
obj.delete()
|
