No session start when appending events via API

[wochinge]

Proposed changes:

• don't append events when using the append endpoint at the API. When you append events event by event, then we should not run / add events automatically and rather take the history as it is
• remove deprecation for /conversations/<conversation_id>/execute since this part is heavily used by rasa interactive

Status (please check what you already did):

• added some tests for the functionality
• updated the documentation
• updated the changelog (please check changelog for instructions)
• reformat files using black (please check Readme for instructions)

[wochinge]

@ricwo Could you please have a short look? This will fix some behavior in Rasa X interactive learning (part of https://github.com/RasaHQ/rasa-x/issues/2023 ) .

And another thing: This changes the behavior of rasa interactive - we could also use a query param to decide whether to retrieve an empty tracker or one with session start events I checked it out. The session start events are still correctly attached in rasa interactive

[ricwo]

The code looks great so far 👍

I checked it out. The session start events are still correctly attached in rasa interactive

Yes rasa interactive uses GET /tracker which fetches the tracker with the session start sequence

[ricwo]

should we make this a processor method, so the contrast with get_tracker_with_session_start() is more apparent?

[wochinge]

Mhm, it's already a processor method? I could move it up so that they are right next to each other?

[ricwo]

💯