From bdfea16779b1372635f1289b5794b087ef714021 Mon Sep 17 00:00:00 2001
From: Luca Pizzini <lpizzini7@gmail.com>
Date: Tue, 1 Nov 2022 10:23:38 +0100
Subject: [PATCH] applied requested changes

used applyPlugins option in discriminator helper instead of creating new option mergePlugins
---
 lib/helpers/model/discriminator.js | 8 +++-----
 lib/model.js                       | 3 ++-
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/helpers/model/discriminator.js b/lib/helpers/model/discriminator.js
index 574df112930..96443002ab1 100644
--- a/lib/helpers/model/discriminator.js
+++ b/lib/helpers/model/discriminator.js
@@ -19,13 +19,12 @@ const CUSTOMIZABLE_DISCRIMINATOR_OPTIONS = {
  * ignore
  */
 
-module.exports = function discriminator(model, name, schema, tiedValue, applyPlugins, mergeHooks, mergePlugins) {
+module.exports = function discriminator(model, name, schema, tiedValue, applyPlugins, mergeHooks) {
   if (!(schema && schema.instanceOfSchema)) {
     throw new Error('You must pass a valid discriminator Schema');
   }
 
   mergeHooks = mergeHooks == null ? true : mergeHooks;
-  mergePlugins = mergePlugins == null ? true : mergePlugins;
 
   if (model.schema.discriminatorMapping &&
       !model.schema.discriminatorMapping.isRoot) {
@@ -35,7 +34,7 @@ module.exports = function discriminator(model, name, schema, tiedValue, applyPlu
 
   if (applyPlugins) {
     const applyPluginsToDiscriminators = get(model.base,
-      'options.applyPluginsToDiscriminators', false) || !mergeHooks || !mergePlugins;
+      'options.applyPluginsToDiscriminators', false) || !mergeHooks;
     // Even if `applyPluginsToDiscriminators` isn't set, we should still apply
     // global plugins to schemas embedded in the discriminator schema (gh-7370)
     model.base._applyPlugins(schema, {
@@ -185,8 +184,7 @@ module.exports = function discriminator(model, name, schema, tiedValue, applyPlu
     if (mergeHooks) {
       schema.s.hooks = model.schema.s.hooks.merge(schema.s.hooks);
     }
-
-    if (mergePlugins) {
+    if (applyPlugins) {
       schema.plugins = Array.prototype.slice.call(baseSchema.plugins);
     }
     schema.callQueue = baseSchema.callQueue.concat(schema.callQueue);
diff --git a/lib/model.js b/lib/model.js
index 4741a49e773..8f876bc3321 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -1233,6 +1233,7 @@ Model.discriminator = function(name, schema, options) {
   options = options || {};
   const value = utils.isPOJO(options) ? options.value : options;
   const clone = typeof options.clone === 'boolean' ? options.clone : true;
+  const mergePlugins = typeof options.mergePlugins === 'boolean' ? options.mergePlugins : true;
 
   _checkContext(this, 'discriminator');
 
@@ -1243,7 +1244,7 @@ Model.discriminator = function(name, schema, options) {
     schema = schema.clone();
   }
 
-  schema = discriminator(this, name, schema, value, true, options.mergeHooks, options.mergePlugins);
+  schema = discriminator(this, name, schema, value, mergePlugins, options.mergeHooks);
   if (this.db.models[name] && !schema.options.overwriteModels) {
     throw new OverwriteModelError(name);
   }