We are working for update doc for SXIMO 5.1.7

Nested select Dropdown

Example you have 3 database tables customer

id , name , email , country_id , city_id 

country

country_id , country_name

city

city_id , city_name , country_id 
Next , create module as usualy for customer using code builder edit form, make county_id as select lookup to table country edit form, make city_id as select lookup to table city

the scenario

 everytime you select country , all city list should change following selected country_id Now go to editor form tab and edit field city_id , check parent filter checkbox and fill the input form with country_id Last Step rebuild the form and you will see , everytime country selected , all city list will changed