def forwards(self, orm):
        from moocng.mongodb import get_micro_blog_db
        db = get_micro_blog_db()
        post = db.get_collection('post')
        post.create_index([('date', pymongo.DESCENDING)])
        post.create_index([('id_user', pymongo.ASCENDING)])

        user = db.get_collection('user')
        user.create_index([('id_user', pymongo.ASCENDING)])
    def forwards(self, orm):
        from moocng.mongodb import get_db

        db = get_db()
        activity = db.get_collection("groups")

        activity.create_index([("id_course", pymongo.ASCENDING)])
 def forwards(self, orm):
     from moocng.mongodb import get_db
     db = get_db()
     activity = db.get_collection('activity')
   
     activity.create_index([('current', pymongo.ASCENDING)])