Dropdown with an array

Question

Hi, 
 When I am trying to assign an array to a local variable and use the same for dropdown choiceLabels and choiceValues, I am getting an error. 
 Any idea why I am getting this error.

Naresh · Answer

Hi, 
 Don't use merge function to append two arrays. Review Appian documentation if you are not sure about that function. I am posting a sample code here, it will work for your case. 
 a!localVariables(
 local!reviewOptionLable1AI: {"Additional Info Required"},
 local!reviewOptionValueAI: {"AIR"},
 local!reviewOptionLabelCancel: {"Cancelled"},
 local!reviewOptionValueCancel: {"CSED"},
 local!reviewOptionLable: {local!reviewOptionLable1AI, local!reviewOptionLabelCancel},
 local!reviewOptionValue: {local!reviewOptionValueAI, local!reviewOptionValueCancel},
 a!formLayout(
 contents: {
 a!dropdownField(
 label: "Review Options",
 placeholder: "--- Select a Review Option ---",
 choiceLabels: local!reviewOptionLable,
 choiceValues: local!reviewOptionValue,
 value: "",/*your rule input*/
 saveInto: {
 /*save back to your rule input*/
 }
 )
 }
 )
)

Harshit Bumb (Appyzie) · Answer

Use the append or flatten function instead.
Flatten is used to flat a nested array. Append, as the name suggests, is used to append a variable to an array. Using merge will create a nested array that will cause problems.