From 754db14177fb1dcfc88f99d9600232e1b2b4112a Mon Sep 17 00:00:00 2001
From: Bruno <brunohcastro@gmail.com>
Date: Sat, 18 Nov 2017 14:20:46 -0300
Subject: [PATCH 1/3] fix(model): allow virtual ref function to return arrays

---
 lib/model.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/model.js b/lib/model.js
index ecf2ff52eee..000c1d2e80c 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -3580,7 +3580,15 @@ function getModelsMapForPopulate(model, docs, options) {
           if (typeof ref === 'function') {
             ref = ref.call(doc, doc);
           }
-          modelNames = [ref];
+          
+          // When referencing nested arrays, the ref should be an Array 
+          // of modelNames.
+          if (Array.isArray(ref)) {
+            modelNames = ref;
+          } else {
+            modelNames = [ref];
+          }
+
           isVirtual = true;
         } else {
           // We may have a discriminator, in which case we don't want to

From 69f4ced7d9c9631a7637ba445224210af8e6e474 Mon Sep 17 00:00:00 2001
From: Bruno <brunohcastro@gmail.com>
Date: Sat, 18 Nov 2017 14:30:09 -0300
Subject: [PATCH 2/3] fix trailing spaces

---
 lib/model.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/model.js b/lib/model.js
index 000c1d2e80c..d159f13a3b7 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -3580,7 +3580,7 @@ function getModelsMapForPopulate(model, docs, options) {
           if (typeof ref === 'function') {
             ref = ref.call(doc, doc);
           }
-          
+
           // When referencing nested arrays, the ref should be an Array 
           // of modelNames.
           if (Array.isArray(ref)) {

From 0b13451bb89d4d6a4be81447fcbcd1039da0c2cd Mon Sep 17 00:00:00 2001
From: Bruno <brunohcastro@gmail.com>
Date: Sat, 18 Nov 2017 14:33:27 -0300
Subject: [PATCH 3/3] fix trailing spaces

---
 lib/model.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/model.js b/lib/model.js
index d159f13a3b7..3405b990224 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -3581,7 +3581,7 @@ function getModelsMapForPopulate(model, docs, options) {
             ref = ref.call(doc, doc);
           }
 
-          // When referencing nested arrays, the ref should be an Array 
+          // When referencing nested arrays, the ref should be an Array
           // of modelNames.
           if (Array.isArray(ref)) {
             modelNames = ref;