patt/signals.py

from django.db.models.signals import pre_delete, post_delete, post_save
from django.dispatch import receiver
from .models import Task, Project, Comment
from mycreole import delete_attachment_target_path
from .search import load_index, delete_item, update_item


@receiver(pre_delete, sender=Task)
@receiver(pre_delete, sender=Project)
@receiver(pre_delete, sender=Comment)
def item_cache_delete(instance, **kwargs):
    delete_attachment_target_path(instance.attachment_target_path)


@receiver(post_delete, sender=Task)
def search_index_item_delete(instance, **kwargs):
    # delete index entry
    ix = load_index()
    delete_item(ix, instance)


@receiver(post_save, sender=Task)
@receiver(post_save, sender=Comment)
@receiver(post_delete, sender=Comment)
def search_index_item_update(instance, **kwargs):
    if type(instance) == Comment:
        task = instance.task
    else:
        task = instance
    ix = load_index()
    update_item(ix, task)