From c3c31edc04713a505e1e02aa1fa18891e362e53d Mon Sep 17 00:00:00 2001
From: Mike Robertson <mjr127+github@case.edu>
Date: Tue, 31 Jan 2017 11:30:21 -0500
Subject: [PATCH] Throw an error if id field is missing from group object at
 addGroup function invocation.

---
 assets/scripts/src/choices.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/assets/scripts/src/choices.js b/assets/scripts/src/choices.js
index 24de403..224c92e 100644
--- a/assets/scripts/src/choices.js
+++ b/assets/scripts/src/choices.js
@@ -790,6 +790,7 @@ class Choices {
             const isSelected = result.selected ? result.selected : false;
             const isDisabled = result.disabled ? result.disabled : false;
             if (result.choices) {
+              if (result.id === undefined || result.id === null) throw new Error('Group id field missing');
               this._addGroup(result, result.id, value, label);
             } else {
               this._addChoice(isSelected, isDisabled, result[value], result[label]);
@@ -1120,6 +1121,7 @@ class Choices {
           const isSelected = result.selected ? result.selected : false;
           const isDisabled = result.disabled ? result.disabled : false;
           if (result.choices) {
+            if (result.id === undefined || result.id === null) throw new Error('Group id field missing');
             this._addGroup(result, result.id, value, label);
           } else {
             this._addChoice(isSelected, isDisabled, result[value], result[label]);
@@ -2173,6 +2175,7 @@ class Choices {
 
       if (passedGroups && passedGroups.length) {
         passedGroups.forEach((group) => {
+          if (group.id === undefined || group.id === null) throw new Error('Group id field missing');
           this._addGroup(group, group.id);
         });
       } else {