from django.contrib.contenttypes.models import ContentType
from django.db.models import get_apps,get_models,signals
from django.utils.encoding import smart_unicode
def update_contenttypes(app, created_models, verbosity=2, **kwargs):
"""
Creates content types for models in the given app, removing any model
entries that no longer have a matching model class.
"""
ContentType.objects.clear_cache()
content_types = list(ContentType.objects.filter(app_label=app.__name__.split('.')[-2]))
app_models = get_models(app)
if not app_models:
return
for klass in app_models:
opts = klass._meta
try:
ct = ContentType.objects.get(app_label=opts.app_label,
model=opts.object_name.lower())
content_types.remove(ct)
except ContentType.DoesNotExist:
ct = ContentType(name=smart_unicode(opts.verbose_name_raw),
app_label=opts.app_label, model=opts.object_name.lower())
ct.save()
if verbosity >= 2:
print "Adding content type '%s | %s'" % (ct.app_label, ct.model)
# The presence of any remaining content types means the supplied app has an
# undefined model. Confirm that the content type is stale before deletion.
if content_types:
if kwargs.get('interactive', False):
content_type_display = '\n'.join([' %s | %s' % (ct.app_label, ct.model) for ct in content_types])
ok_to_delete = raw_input("""The following content types are stale and need to be deleted:
%s
Any objects related to these content types by a foreign key will also
be deleted. Are you sure you want to delete these content types?
If you're unsure, answer 'no'.
Type 'yes' to continue, or 'no' to cancel: """ % content_type_display)
else:
ok_to_delete = False
if ok_to_delete == 'yes':
for ct in content_types:
if verbosity >= 2:
print "Deleting stale content type '%s | %s'" % (ct.app_label, ct.model)
ct.delete()
else:
if verbosity >= 2:
print "Stale content types remain."
def update_all_contenttypes(verbosity=2, **kwargs):
for app in get_apps():
update_contenttypes(app, None, verbosity, **kwargs)
signals.post_syncdb.connect(update_contenttypes)
if __name__ == "__main__":
update_all_contenttypes()
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