Timebox for research on OrderHandler: 2 SP

User Story:

As a developer, I want to integrate datasource which contain arrays and nested data structures that I want to show in detail subapps, so that I can work with most REST datasources.

There appears to be a limitation in the current rest datasource.

I was not able to display the content from this endpoint in a detail view.
http://transport.opendata.ch/v1/stationboard?station=basel

One of the things that appears to be missing to use a multiField is an appropiate orderHandler for json data.

For jcr there is:

orderHandler:
  $type: jcrChildNodeOrderHandler

But I could not supply an appropriate "orderHandler" as there is not one for the jsonDatasource.

Also for jcr there is:

itemProvider:
  $type: delegateToSubNodeProvider

 Not sure if there is something for json.

To reproduce:

• Drop this light module in Magnolia: https://git.magnolia-cms.com/users/czimmermann/repos/restclient-testing/browse/light-modules/rc-transportation-demo
• Open the Stations app.
• Click on one of the stations and click the View action.
• Exception.

Notes

See: https://git.magnolia-cms.com/users/czimmermann/repos/restclient-testing/browse/light-modules/rc-transportation-demo/apps/stations.yaml

In particular look at line #55 for the jsonPath.

Look at line #69 and after for the form configuration. Look for (MULTIFIELD)

More Notes

 Trying to do what is demod in M6UI in contacts app:

contactsV8 app. (Line 283) https://git.magnolia-cms.com/projects/MODULES/repos/contacts-app/browse/src/main/resources/contacts/apps/contacts-v8.yaml