Fix $addToSet

types/meteor/mongo.d.ts

@@ -96,7 +96,7 @@ declare module "meteor/mongo" {
             { $each?: T[P], $position?: number, $slice?: number, $sort?: 1 | -1 | Dictionary<number> }
         }
         type ArraysOrEach<T> = {
-            [P in keyof T]?: OnlyArrays<T[P]> | { $each: T[P] }
+            [P in keyof T]?: OnlyElementsOfArrays<T[P]> | { $each: T[P] }
         }
         type CurrentDateModifier = { $type: "timestamp" | "date" } | true
         type Modifier<T> = T | {

types/meteor/test/meteor-tests.ts

@@ -246,7 +246,13 @@ Items.insert({ list: groceriesId, name: "Persimmons" });
 /**
  * From Collections, collection.update section
  */
-var Players = new Mongo.Collection('Players');
+
+interface Players {
+  score: number
+  badges: string[]
+}
+
+var Players: Mongo.Collection<Players> = new Mongo.Collection('Players');
 
 Template['adminDashboard'].events({
     'click .givePoints': function () {
@@ -265,6 +271,17 @@ Meteor.methods({
     }
 });
 
+/**
+ * Also from Collections, collection.update section
+ */
+Meteor.methods({
+    declareWinners: function () {
+        Players.update({ score: { $gt: 10 } },
+            { $addToSet: { badges: {$each: ["Winner", "Super"]} } },
+            { multi: true });
+    }
+});
+
 /**
  * From Collections, collection.remove section
  */