def create_or_check_slug(instance, model, **extra_filters):
"""
returns a unique slug
:param instance : target instance
:param model: needed as instance._meta.model is available since django 1.6
:param extra_filters: filters needed for Forum and Topic for their unique_together field
"""
initial_slug = instance.slug or slugify(instance.name)
count = -1
last_count_len = 0
slug_is_not_unique = True
while slug_is_not_unique:
count += 1
if count >= defaults.PYBB_NICE_URL_SLUG_DUPLICATE_LIMIT:
msg = _(
'After %(limit)s attemps, there is not any unique slug value for "%(slug)s"'
)
raise ValidationError(
msg % {
'limit': defaults.PYBB_NICE_URL_SLUG_DUPLICATE_LIMIT,
'slug': initial_slug
})
count_len = len(str(count))
if last_count_len != count_len:
last_count_len = count_len
filters = {
'slug__startswith': initial_slug[:(254 - count_len)],
}
if extra_filters:
filters.update(extra_filters)
objs = model.objects.filter(**filters).exclude(pk=instance.pk)
slug_list = [obj.slug for obj in objs]
if count == 0:
slug = initial_slug
else:
slug = '%s-%d' % (initial_slug[:(254 - count_len)], count)
slug_is_not_unique = slug in slug_list
return slug
def create_or_check_slug(instance, model, **extra_filters):
"""
returns a unique slug
:param instance : target instance
:param model: needed as instance._meta.model is available since django 1.6
:param extra_filters: filters needed for Forum and Topic for their unique_together field
"""
initial_slug = instance.slug or slugify(instance.name)
count = -1
last_count_len = 0
slug_is_not_unique = True
while slug_is_not_unique:
count += 1
if count >= defaults.PYBB_NICE_URL_SLUG_DUPLICATE_LIMIT:
msg = _('After %(limit)s attemps, there is not any unique slug value for "%(slug)s"')
raise ValidationError(msg % {'limit': defaults.PYBB_NICE_URL_SLUG_DUPLICATE_LIMIT,
'slug': initial_slug})
count_len = len(str(count))
if last_count_len != count_len:
last_count_len = count_len
filters = {'slug__startswith': initial_slug[:(254-count_len)], }
if extra_filters:
filters.update(extra_filters)
objs = model.objects.filter(**filters).exclude(pk=instance.pk)
slug_list = [obj.slug for obj in objs]
if count == 0:
slug = initial_slug
else:
slug = '%s-%d' % (initial_slug[:(254-count_len)], count)
slug_is_not_unique = slug in slug_list
return slug
