```python
    db.delete(mod)
    for featured in Featured.query.filter(Featured.mod_id == mod.id).all():
        db.delete(featured)
    for media in Media.query.filter(Media.mod_id == mod.id).all():
        db.delete(media)
    for version in ModVersion.query.filter(ModVersion.mod_id == mod.id).all():
        db.delete(version)
    base_path = os.path.join(secure_filename(mod.user.username) + '_' +
                             str(mod.user.id), secure_filename(mod.name))
    db.commit()
    notify_ckan(mod, 'delete')
    storage = _cfg('storage')
    if storage:
        full_path = os.path.join(storage, base_path)
        rmtree(full_path)
```