From 7b42c15a42f787ec26d0faee074f7674eac41ca3 Mon Sep 17 00:00:00 2001
From: Valeri Karpov <val@karpov.io>
Date: Tue, 5 Dec 2017 22:45:52 -0800
Subject: [PATCH] fix(document): ensure projection with only $slice isn't
 treated as inclusive for discriminators

Fix #4991
---
 lib/document.js                           | 3 ++-
 test/model.discriminator.querying.test.js | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/document.js b/lib/document.js
index dc8df23830f..188b554f296 100644
--- a/lib/document.js
+++ b/lib/document.js
@@ -1258,7 +1258,8 @@ Document.prototype.isSelected = function isSelected(path) {
       if (cur === '_id') {
         continue;
       }
-      if (this.$__.selected[cur] && this.$__.selected[cur].$meta) {
+      var projection = this.$__.selected[cur];
+      if (projection && (projection.$meta || projection.$slice)) {
         continue;
       }
       inclusive = !!this.$__.selected[cur];
diff --git a/test/model.discriminator.querying.test.js b/test/model.discriminator.querying.test.js
index 2cb3fe7cf55..69e4732a563 100644
--- a/test/model.discriminator.querying.test.js
+++ b/test/model.discriminator.querying.test.js
@@ -1023,13 +1023,13 @@ describe('model', function() {
           var Discriminator = Base.discriminator('gh4991_A1', discriminatorSchema);
 
           var obj = { propA: 'Hi', propB: 'test', array: ['a', 'b'] };
-          Discriminator.create(obj, function(error, doc) {
+          Discriminator.create(obj, function(error) {
             assert.ifError(error);
             Base.find().slice('array', 1).exec(function(error, docs) {
               assert.equal(docs.length, 1);
               assert.equal(docs[0].propA, 'Hi');
               done();
-            })
+            });
           });
         });