How to use unique items from Google SpreadSheet as a choice to Google Forms List Item?

Question

I\'m new with Google scripts and now I have to make a form with a list of choices. These choices should be picked up from the Google sheet. So the first question is how to chos

Answer 1

Looking at the methods available to populate the ListItem, you have to choose one and set your data up so it matches the expected input. For my example, I chose the setChoiceValues method, which looks for an array. So I have to manipulate the items into an array.

One thing the getRange.getValues() method does NOT get you is how many non-blank items are returned in the list. I used this quick way to get a count of those items, so I have a maximum bound for my loops. Then, I formed the itemArray and added only the non-blank items to it.

After that, it's just a matter of creating the ListItem and adding the values:

function getMembranesList() {
  var ss = SpreadsheetApp.openByUrl("https://docs.google.com/spreadsheets/...");
  var itemList = ss.getSheetByName('Answers').getRange("Q1:Q").getValues();
  var itemCount = itemList.filter(String).length;
  var itemArray = [];
  for (var i = 0; i < itemCount; i++) {
    itemArray[i] = itemList[i];
  }
  var form = FormApp.getActiveForm();
  var item = form.addListItem();
  item.setTitle('test question');
  item.setChoiceValues(itemArray);
}