Inserting elements to a list in Database


The code below is supposed to add the element “Partying” to the empty list in the database. Debugging the pink block in a text box displayed “undefined”. What am I doing wrong here? How else would I access the key in the database and insert "Partying as last element of the list “Interests”?


rather than creating a list here (which isn’t a URL) you could just create a variable with the string “universities/mailsac/users” and pass that instead.