Adding Entity Child Lists: Best Practices

[blueprint]

For Entities such as Quote (and QuoteItem), there is a field called itemList which is of type Json Array.

Presently, there appears to be no way to create this type of field using the Entity Manager so the only solution is some back-end tinkering.

Can anyone from the EspoCRM team provide a "best practice" way of creating such a field type and any other inter-related fields (like the items relationship between Quote and QuoteItem).

I guess ideally, this type of Entity/EntityItem linkage could be created using the Entity Manager at the back-end.

[eymen-elkum]

see this https://www.youtube.com/watch?v=fvllcGJhKNg

[blueprint]

I'm not seeing how this helps?