validate if entered string is in array of string

Certified Associate Developer

Hello i am trying to make validation for editable grid in appian so i am not able to enter same value into multiple rows but even when value is entered only in one row validation is triggered. Here is the code for validation:

validations: if(
fv!item.value = local!arrayOfStrings,
"Id already exist",

fv!item.value is always there at least once as it is automatically stored in local!arrayOfString so even if it is not in local variable once i entered the value into grid it is saved into  array so i need to check if it is there more than once

thanks for any advice in advance

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