new_contents: from datetime import datetime
  
  from bson import ObjectId
  from flask import current_app
  from pydash import filter_
  from pydash import map_
  
  from ereuse_devicehub.resources.device.component.settings import Component
  from ereuse_devicehub.resources.device.domain import DeviceDomain
  from ereuse_devicehub.resources.event.device import DeviceEventDomain
  from ereuse_devicehub.scripts.updates.re_materialize_events_in_devices import ReMaterializeEventsInDevices
  
  
  class FixAddMigrateFrom(ReMaterializeEventsInDevices):
      """Re-does internally a Migrate that was erroniously partly-erased"""
      def execute(self, database):
          if database == 'alencop':
              DeviceEventDomain.delete({"_id": ObjectId('58e283091f632f56a18ca413')})
              ids = list(range(1348, 1448))
              ids = [str(_id) for _id in ids]
              devices = DeviceDomain.get({'_id': {'$in': ids}})
              non_components = filter_(devices, lambda x: x['@type'] not in Component.types)
              components = filter_(devices, lambda x: x['@type'] in Component.types)
              migrate = {
                  '_id': ObjectId('58e283091f632f56a18ca413'),
                  'label': 'BCN Activa a Alencop Març',
                  'events': [],
                  'devices': map_(non_components, '_id'),
                  'components': map_(components, '_id'),
                  'from': "https://devicehub.ereuse.org/circuit-reutilitza-cat/events/devices/migrate/569c285e75d9351f7f82f668",
                  "comment": "Transferència de la donació de Barcelona Activa al Circuit Pangea que Alencop va recollir.",
                  "label": "Barcelona Activa (Març) a Alencop.",
                  '_updated': datetime.strptime("2017-04-03T17:14:37", current_app.config['DATE_FORMAT']),
                  '_created': datetime.strptime("2017-04-03T17:14:37", current_app.config['DATE_FORMAT']),
                  '@type': 'devices:Migrate'
              }
              DeviceEventDomain.insert(migrate)
              super(FixAddMigrateFrom, self).execute(database)
  
subject: Add a fix FixAddMigrateFrom to solve a specific Migrate Problem