Multiple requests in a transaction

I have a schema capturing events and participants:

CREATE TABLE demo.participant(
  id BIGINT DEFAULT,
  name VARCHAR(255) NOT NULL
  );

CREATE TABLE demo.event(
  id BIGINT DEFAULT,
  title VARCHAR(255) NOT NULL
  );

CREATE TABLE demo.event_participant(
  event_id BIGINT NOT NULL REFERENCES demo.event(id),
  participant_id BIGINT NOT NULL REFERENCES demo.participant(id),
  PRIMARY KEY(event_id,participant_id)
  );

I can expose these tables directly with 3 postgrest views. However, I required that inserting/updating an event and the participants in that event should be atomic.

I think I need a single view that somehow data from event and event_participant, and is insertable/updateable.

Is there any way to do this with postgrest?

The issue names a PostgreSQL schema with event, participant, and event_participant tables and three PostgREST views, but no source file or test. Start by checking PostgREST's writable-view and transaction behavior; done would require a supported way to insert or update an event and its participants atomically, or a documented limitation.