Unable to assign multiple checkbox selected values to a CDT

Question

I have a CDT " AT_employeelanguages" 
 like below-attached screen 
 
 I am pulling the below table data using an expression and referring to the same using an expression rule AT_GetLanguages() 
 
 When I use the below code, nothing is saved into my CDT " employeelanguages". Can someone guide me to solve this issue? Thanks in advance. 
 
 a!localVariables( local!languages: rule!AT_GetLanguages(), local!selectedLanguages, a!formLayout( label: "Test" & local!selectedLanguages, contents: { a!checkboxField( label: "Languages Known", choiceLabels: index(local!languages, "name", null), choiceValues: index(local!languages, "languagenumber", null), value: local!selectedLanguages, saveInto: { local!selectedLanguages, a!save( ri!employeelanguages, local!selectedLanguages ) } ) } )

ajhick · Answer

local!selectedLanguages is just the language number so you're trying to save a list of integer into a CDT without telling the save WHERE in the CDT you want to save it (as in, what field). 
 I'd do it like this: 
 a!localVariables(
 local!languages: {
 {
 languagenumber: 1,
 name: "English"
 },
 {
 languagenumber: 2,
 name: "Spanish"
 },
 {
 languagenumber: 3,
 name: "Telugu"
 }
 },
 local!selectedLanguages,
 local!employeelanguages, /*Using a local variable rather than rule input so that the code works when copy pasting*/
 a!formLayout(
 label: "Test" & index(
 local!employeelanguages,
 "languagenumber",
 {}
 ),
 contents: {
 a!checkboxField(
 label: "Languages Known",
 choiceLabels: index(local!languages, "name", null),
 choiceValues: index(local!languages, "languagenumber", null),
 value: index(
 local!employeelanguages,
 "languagenumber",
 {}
 ),
 saveInto: {
 local!selectedLanguages,
 a!save(
 target: local!employeelanguages,
 value: a!forEach(
 items: local!selectedLanguages,
 expression: {
 languageid: null,
 employeeid: loggedInUser(),
 languagenumber: fv!item
 }
 )
 )
 }
 ),
 a!paragraphField(
 value: local!employeelanguages
 )
 }
 )
)