def pre_save(self, instance, add):
# get currently entered slug
value = self.value_from_object(instance)
# autopopulate
if self.always_update or (self.populate_from and not value):
value = utils.get_prepopulated_value(self, instance)
if __debug__ and not value:
print 'Failed to populate slug %s.%s from %s' % \
(instance._meta.object_name, self.name, self.populate_from)
slug = self.slugify(value)
if not slug:
# no incoming value, use model name
slug = instance._meta.module_name
assert slug, 'slug is defined before trying to ensure uniqueness'
slug = utils.crop_slug(self, slug)
# ensure the slug is unique (if required)
if self.unique or self.unique_with:
slug = utils.generate_unique_slug(self, instance, slug)
assert slug, 'value is filled before saving'
# make the updated slug available as instance attribute
setattr(instance, self.name, slug)
return slug
def pre_save(self, instance, add):
# get currently entered slug
value = self.value_from_object(instance)
manager = self.manager
# autopopulate
if self.always_update or (self.populate_from and not value):
value = utils.get_prepopulated_value(self, instance)
if __debug__ and not value:
print 'Failed to populate slug %s.%s from %s' % \
(instance._meta.object_name, self.name, self.populate_from)
slug = self.slugify(value)
if not slug:
# no incoming value, use model name
slug = instance._meta.module_name
assert slug, 'slug is defined before trying to ensure uniqueness'
slug = utils.crop_slug(self, slug)
# ensure the slug is unique (if required)
if self.unique or self.unique_with:
slug = utils.generate_unique_slug(self, instance, slug, manager)
assert slug, 'value is filled before saving'
# make the updated slug available as instance attribute
setattr(instance, self.name, slug)
return slug
def pre_save(self, instance, add):
# get currently entered slug
value = self.value_from_object(instance)
manager = self.manager
# autopopulate
if self.always_update or (self.populate_from and not value):
value = utils.get_prepopulated_value(self, instance)
if __debug__ and not value:
print 'Failed to populate slug %s.%s from %s' % \
(instance._meta.object_name, self.name, self.populate_from)
slug = self.slugify(value)
if not slug:
# no incoming value, use model name
slug = instance._meta.module_name
assert slug, 'slug is defined before trying to ensure uniqueness'
slug = utils.crop_slug(self, slug)
# ensure the slug is unique (if required)
if self.unique or self.unique_with:
slug = utils.generate_unique_slug(self, instance, slug, manager)
assert slug, 'value is filled before saving'
# check if redirect tracking is on and if so prepare
if not add and self.redirect_tracking:
# Can we import the needed django.contrib.redirects app
try:
from django.contrib.redirects.models import Redirect
from django.contrib.sites.models import Site
except ImportError:
raise Exception("You are using redirect_tracking. Please be sure to add django contrib apps Redirect and Site to your INSTALLED_APPS.")
# does model instance have get_absolute_url defined
try:
# capture current get_absolute_url
pre_update_absolute_url = instance.get_absolute_url()
except AttributeError:
raise Exception("You are using redirect_tracking on a field whose model does not have get_absolute_url defined. You must define this method on your model.")
# make the updated slug available as instance attribute
setattr(instance, self.name, slug)
if not add and self.redirect_tracking:
# check if the slug update caused a change in get_absolute_url
# if so and redirect_tracking = True, record in the django contrib redirect app.
post_update_absolute_url = instance.get_absolute_url()
if pre_update_absolute_url != post_update_absolute_url:
# current site
site = Site.objects.get_current()
# add a redirect
redirect = Redirect(
site=site,
old_path=pre_update_absolute_url,
new_path=post_update_absolute_url
)
redirect.save()
return slug