From 44dd2ddc110ca66d60077ade9760fa04c2965cb3 Mon Sep 17 00:00:00 2001
From: Valeri Karpov <val@karpov.io>
Date: Mon, 24 Feb 2025 16:35:30 -0500
Subject: [PATCH] fix: handle getter for single nested that returns non-object
 #42

---
 index.js           |  2 +-
 test/index.test.js | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index b983f27..8072ba8 100644
--- a/index.js
+++ b/index.js
@@ -117,7 +117,7 @@ function applyGettersToDoc(schema, doc) {
           val[i] = schematype.caster.applyGetters(val[i], doc);
         }
       }
-    } if (val && schematype.$isSingleNested) {
+    } if (val && typeof val === 'object' && schematype.$isSingleNested) {
       applyGettersToDoc.call(this, schematype.schema, val);
     } else {
       mpath.set(path, val, doc);
diff --git a/test/index.test.js b/test/index.test.js
index 3d120b1..9e7e696 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -526,4 +526,28 @@ describe('mongoose-lean-getters', function() {
       })
     );
   });
+
+  it('handles single nested getter that returns primitive (gh-42)', async function() {
+    const AccountSchema = new mongoose.Schema({
+      name: {
+        _id: false,
+        type: {
+          first: { type: String, required: true },
+          last: { type: String, required: true },
+        },
+        get: function(v) {
+          return v.first + v.last;
+        },
+      },
+    });
+    AccountSchema.plugin(mongooseLeanGetters);
+    const Account = mongoose.model('gh-42-subdoc-getter', AccountSchema);
+    const { _id } = await Account.create({
+      name: { first: 'Hamo', last: 'Boker' },
+    });
+    const account = await Account.findById(_id).lean({
+      getters: true,
+    });
+    assert.strictEqual(account.name, 'HamoBoker');
+  });
 });