How to use nested CDT fields( rule input) in an Interface

Question

I have an interface in that there is a rule input of type Employee CDT. one filed of that CDT there is a foreign key (other CDT). I want to access the nested fields in my interface. how to access the nested fields?

gayathris0003 · Answer

community.appian.com/.../updating-data-in-a-nested-cdt 
 https://community.appian.com/discussions/f/general/21333/query-a-nested-cdt 
 Refer these You could do index(mainCDT, mainCDT_id, 0).nestedCDT should give you one item of type nestedCDT corresponding to that row. Or you could try property(mainCDT, nestedCDT, {}) which should return a list of all the nestedCDT objects inside the list of mainCD