Interface Definition: Expression evaluation error at function a!dropdownField [line 9]

Question

Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!dropdownField [line 9]: A dropdown component [label=&ldquo;Category&rdquo;] has an invalid value for &ldquo;value&rdquo;. All selected values must be present in the choiceValues array, but value was 2 and choiceValues was 1; 2; 3; 4.

robertp · Answer

Hi, One possible cause of this issue comes from casting. It's possible that the value selected is a different type than the choice values. I hope this helps.

robertp · Answer

To clarify - 
 Consider the following code block. 
 a!dropdownField( choiceValues:{1,2,3,4}, choiceLabels:{1,2,3,4}, value:"2" )... 
 This will give you an error of - Interface Definition: Expression evaluation error at function a!dropdownField [line 12]: A dropdown component [label=&ldquo;&rdquo;] has an invalid value for &ldquo;value&rdquo;. All selected values must be present in the choiceValues array, but value was 2 and choiceValues was 1; 2; 3; 4. 
 This is because the value is a string, and not an integer, therefore it is not 2, it is "2". 
 
 By casting the value to the same type as the choiceValues (from a string to an integer), you would be able to fix this problem. 
 E.G: 
 a!dropdownField( choiceValues:{1,2,3,4}, choiceLabels:{1,2,3,4}, value: tointeger("2") )... 
 
 This may not be the solution to your problem, however without more context, that is the immediate problem that pops into mind for me. 
 
 Hope this is helpful!

aloks0189 · Answer

Agreed to what robertp suggested over here. Alternatively you can print the Choice values type using typename() and typeof() function with the form / section label, to identify the type of the choice value. Make sure Your value and choice value are of same type (including array).