fix(document): avoid double-calling array getters when using .get('arr.0')

Re: #13748 Re: #13774

Author: vkarpov15

lib/utils.js

@@ -640,7 +640,10 @@ exports.getValue = function(path, obj, map) {
 const mapGetterOptions = Object.freeze({ getters: false });
 
 function getValueLookup(obj, part) {
- const _from = obj?._doc || obj;
+ let _from = obj?._doc || obj;
+ if (_from != null && _from.isMongooseArrayProxy) {
+ _from = _from.__array;
+ }
  return _from instanceof Map ?
  _from.get(part, mapGetterOptions) :
  _from[part];

test/document.test.js

@@ -12386,6 +12386,10 @@ describe('document', function() {
  assert.equal(oneUser.hobbies[0], 'swimming');
  assert.equal(oneUser.hobbies[0], 'swimming');
  assert.equal(oneUser.hobbies[0], 'swimming');
+
+ assert.equal(oneUser.get('hobbies.0'), 'swimming');
+ assert.equal(oneUser.get('hobbies.0'), 'swimming');
+ assert.equal(oneUser.get('hobbies.0'), 'swimming');
  });
 
  it('sets defaults on subdocs with subdoc projection (gh-13720)', async function() {