From 73b45f2fa2b4abcb2e88a0e319d722b50a319bda Mon Sep 17 00:00:00 2001
From: David Glasser <glasser@meteor.com>
Date: Thu, 10 Oct 2013 17:16:36 -0700
Subject: [PATCH] Actually use Slava's function in oplog tailing.

Tests pass, but I have not confirmed that it actually has the desired
end-to-end effect.
---
 packages/mongo-livedata/oplog.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/packages/mongo-livedata/oplog.js b/packages/mongo-livedata/oplog.js
index e3ed2841e5..a182a9f442 100644
--- a/packages/mongo-livedata/oplog.js
+++ b/packages/mongo-livedata/oplog.js
@@ -137,8 +137,13 @@ MongoConnection.prototype._observeChangesWithOplog = function (
         LocalCollection._modify(newDoc, op.o);
         handleDoc(id, newDoc);
       } else {
-        // XXX for not-currently-published docs, if we can guarantee the
-        // irrelevance of the change, we can skip it
+        // If the selector is not affected by the modifier, no need to do
+        // anything!
+        if (!LocalCollection._isSelectorAffectedByModifier(
+          cursorDescription.selector, op.o)) {
+          return;
+        }
+
         curiousity.set(id, op.ts.toString());
         beCurious();
         return;