From 718a9a77b6a28f3b49ee05256deb2dc6f772e65c Mon Sep 17 00:00:00 2001
From: Captain Caius <241342+captaincaius@users.noreply.github.com>
Date: Tue, 29 Oct 2019 01:13:09 +0200
Subject: [PATCH] fix(document): allow validation of moddelless documents on
 node side

Fix #8237, fix #8272, and improve DX by making ephemeral models similar
to normal ones
---
 lib/index.js | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/lib/index.js b/lib/index.js
index 6fbfb932e5c..cbe921ba683 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -23,6 +23,7 @@ const STATES = require('./connectionstate');
 const Types = require('./types');
 const Query = require('./query');
 const Model = require('./model');
+const BrowserDocument = require('./browserDocument');
 const Document = require('./document');
 const applyPlugins = require('./helpers/schema/applyPlugins');
 const get = require('./helpers/get');
@@ -396,6 +397,25 @@ Mongoose.prototype.pluralize = function(fn) {
   return _mongoose._pluralize;
 };
 
+
+Mongoose.prototype.ephemodel = function(schema, skipInit) {
+  let ephemodel = function Ephemodel(doc, fields, skipId) {
+    if (doc instanceof Schema) {
+      throw new TypeError('Argument to `Ephemodel` must be a POJO, ' +
+        '**not** a schema. Make sure you\'re calling `mongoose.ephemodel()`, not ' +
+        '`mongoose.Ephemodel()`.');
+    }
+    BrowserDocument.call(this, doc, this.schema, fields, skipId, skipInit);
+  };
+  ephemodel.__proto__ = BrowserDocument;
+
+  ephemodel.prototype = Object.create(BrowserDocument.prototype);
+  ephemodel.prototype.constructor = ephemodel;
+
+  ephemodel.prototype.schema = schema;
+  return ephemodel;
+}
+
 /**
  * Defines a model or retrieves it.
  *