I create a product of type abc:product with a product Id - 12345 (for example) in the abc:productId field.
I have a type called abc:productContent with the abc:productNumber field. Now when I'm creating the document of type abc:productContent, I'm trying to populate the abc:productNumber field with the value of the above mentioned product Id of abc:product object (and make the field read only).
How to achieve the above?
Thank you for the help