A small update for everyone listening here:
I've made the first steps for creating the Gantt-exporter.
It's not finished, but might be sufficient for some of you already:
The Python API Client often uses relationships (e.g. status) to update entities, but when using the raw API backend or the JS API client I recommend that you instead the relationship key attributes instead. In this case, that would be `status_id`.
A more complete example of a request body would be:
You can retrieve the underlying data with a script and put together a report yourself if you want.
An example is available here: https://bitbucket.org/ftrack/ftrack-recipes/src/master/python/actions/create_report/