Custom fields are not inserted with new ProseMirror editor

Contribute Bug
6

The issue comes from the editor extension discourse-calendar/assets/javascripts/discourse/pre-initializers/rich-editor-extension.js : the list of attributes used by convertFromMarkdown() is defined in the EVENT_ATTRIBUTES constant. It works when adding the custom field to the list.

const EVENT_ATTRIBUTES = {
  // ...
  chatChannelId: { default: null },
  myCustomField: {default: null}
};

There is nothing about custom fields in this file; I have no idea on how to complete this constant with all the custom fields; the extension seems to get registered early in the process.

Any idea welcome, it makes the plugin unusable with the new editor that can’t be disabled, so we’re stuck with Discourse 3.4.