Allura/allura/tasks/activity_tasks.py

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from __future__ import unicode_literals
from __future__ import absolute_import
from tg import app_globals as g
from activitystream.storage.mingstorage import Activity

from allura.lib.decorators import task


@task
def create_timelines(node_id):
    g.director.create_timelines(node_id)


@task
def change_user_name(user_id, new_name):
    Activity.query.update(
        {'actor.node_id': "User:{}".format(user_id)},
        {'$set': {
            "actor.activity_name": new_name,
        }},
        multi=True
    )