I am developing a custom field type which needs to display fields from two different channels in the CP Edit and Publish pages. Users of this field type will need to edit the data from those different channels.
When the data is from a text field it is relatively easy to display it and allow users to edit. However this gets more difficult if I need to display data from a relationship field.
I have read through the developer add-on docs but can't figure out a method of displaying data using another field type within my own. Is there a way of displaying another field type within my custom one?