Created by Mattias Lagergren last modified Mattias Seebergs 2016-03-23

cascade_thumbnails.py

      # :coding: utf-8
# :copyright: Copyright (c) 2015 ftrack

# This snippet was last tested with ftrack 3.3.16 and Python API 0.13.0.

import logging
import ftrack_api


logging.basicConfig()


def cascade_thumbnail(event):
    '''Handle *event* and cascade thumbnail changes on versions.'''

    for entity in event['data'].get('entities', []):
        asset_version = None
        entity_id = None

        # Handle new or updated versions.
        if (
            entity.get('entityType') == 'assetversion' and
            entity.get('action') in ('add', 'update') and
            entity.get('keys', None) and
            'thumbid' in entity.get('keys', [])
        ):
            entity_id = entity['entityId']

        # Handle encoded versions.
        if (
            entity.get('action') in ('encoded',) and
            entity.get('entityType') == 'assetversion'
        ):
            entity_id = entity['entityId']

        # If entity was found, try to get it.
        if entity_id:
            # Get asset version and preload data for performance and to avoid
            # caching issues.
            asset_version = session.query(
                'select thumbnail_id, asset, asset.parent, task '
                'from AssetVersion where id is {0}'.format(
                    entity['entityId']
                )
            ).first()

        if asset_version and asset_version['thumbnail_id']:
            # Update parent and related task if the thumbnail is set.
            parent = asset_version['asset']['parent']
            task = asset_version['task']
            parent['thumbnail_id'] = asset_version['thumbnail_id']

            if task:
                task['thumbnail_id'] = asset_version['thumbnail_id']

    session.commit()


# Subscribe to events with the update topic.
session = ftrack_api.Session()
session.event_hub.subscribe('topic=ftrack.update', cascade_thumbnail)
session.event_hub.wait()

    

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