multidropdown items selection during "Update" related action

Question

Hi, 
 I have an interface which I am using for Employee details capture. 
 I am using the same form for the creation of a new record in the database and for the updation. 
 I have created a RecordType and created "Update Employee" related action. 
 Now when I click on the "Update Employee" button I am getting an error like 
 " Error Evaluating UI Expression Expression evaluation error [evaluation ID = 335d6:04711] in rule 'at_captureemployee' at function a!multipleDropdownField [line 68]: A multiple dropdown component [label="Languages Known"] has an invalid value for "value". All selected values must be present in the choiceValues array, but value was [languageid:25,languagenumber:1]; [languageid:26,languagenumber:4]; [languageid:27,languagenumber:2] and choiceValues was 1; 4; 2; 5; 3." 
 Can someone help on this.

Richard Michaelis · Answer

Hi hari, your issue is, that you choiceValues are elements of "languageNumber" and your value is a "whole" CDT: To make this work some inputs: local!languages:....,
local!selectedLanguages: ri!employeeLanguage,
local!selectedLanguageNumbers: index(selectedLanguages,"languageNumber",null),
....

a!multidropdownfield(
....
 choiceValue: tointeger(index(local!languages,"languageNumber",null)),
 value: tointeger(local!selectedLanguageNumbers),
 saveInto:{
 local!selectedLanguageNumbers,
 a!save(
 target: local!selectedLanguages,
 value: index(
 local!languages,
 wherecontains(
 tointeger(local!selectedLanguageNumbers),
 tointeger(index(local!languages, "languageNumber,{}))
 ),
 null
 )
 )
 }
) 
 is languageNumber your primaryKey? if not , try to use the primary key instead