Use json:api’s /type/id/field_name URLs for fetching relationships #9
Description
Currently, we’re using the ?include=field_name query string parameter format which is optional (currently available in Drupal’s JSON API module’s implementation), but not necessarily supported by all json:api implementations. Requests to /type/id/field_name and /type/id/relationships/field_name should be made in parallel to the main request.
/type/id/field_namefetches the related object(s)/type/id/relationships/field_namefetches the relationship itself (which might include metadata)
This method should probably be the default, with the query string parameter method being an opt-in configuration parameter.