I set up a “lookup” list for populating a 3-level cascading dropdown field set. So, I am able to make a selection in field# 1, and field# 2 shows up and is populated with one or more choices. Then, I make a selection in field# 2, and field# 3 shows up and is populated with one or more choices. So this part works nicely.

The other nice feature is that when any field has only one choice, it is automatically selected. But the anomaly I am encountering is that when any choice is automatically selected in a field, the underlying SharePoint text-field is not populated. Only when I explicitly select a choice in a drop-down, the underlying field is populated with the same value. At first, I didn’t understand what was happening, but when I turned on the debug mode in the script, then I was able to see what was happening. A screenshot of the relevant part of the form is attached. The initialization script is as below:

spjs.casc.init({
	lookupList:"Case Types Lookup",
	lookupListBaseUrl:L_Menu_BaseUrl,
	lookupListFields:["Title","Case_x0020_Library","Document_x0020_Type"],
	thisListFields:["Case_x0020_Type","Case_x0020_Library","Document_x0020_Type"],
	dropDownDefaultvalue:"",
	hideEmptyDropdowns:true,
	autoselectSingleOption:true,
	clearInvalidSelection:true,
	debug:true
});

How do I get the underlying SharePoint field to have the same value as the auto-selected single option in the corresponding drop down field?

Thanks,
Ashwin