From ebf9f312594981863e6031a2643c64261b522d8f Mon Sep 17 00:00:00 2001
From: Philip Andersson <philip.andersson20@gmail.com>
Date: Fri, 4 May 2018 22:49:48 +0200
Subject: [PATCH] Mongoose model init (#25530)

* Adding init method declaration on Model interface

* Test init method on Model
---
 types/mongoose/index.d.ts        | 10 ++++++++++
 types/mongoose/mongoose-tests.ts |  1 +
 2 files changed, 11 insertions(+)

diff --git a/types/mongoose/index.d.ts b/types/mongoose/index.d.ts
index 5723a9a881..362f549e67 100644
--- a/types/mongoose/index.d.ts
+++ b/types/mongoose/index.d.ts
@@ -2714,6 +2714,16 @@ declare module "mongoose" {
     insertMany(doc: any, callback?: (error: any, doc: T) => void): Promise<T>;
     insertMany(doc: any, options?: { ordered?: boolean, rawResult?: boolean }, callback?: (error: any, doc: T) => void): Promise<T>;
 
+    /**
+     * Performs any async initialization of this model against MongoDB.
+     * This function is called automatically, so you don't need to call it.
+     * This function is also idempotent, so you may call it to get back a promise
+     * that will resolve when your indexes are finished building as an alternative
+     * to `MyModel.on('index')`
+     * @param callback optional
+     */
+    init(callback?: (err: any) => void): Promise<T>;
+
     /**
      * Executes a mapReduce command.
      * @param o an object specifying map-reduce options
diff --git a/types/mongoose/mongoose-tests.ts b/types/mongoose/mongoose-tests.ts
index a6fe9f406a..95f50a6e6f 100644
--- a/types/mongoose/mongoose-tests.ts
+++ b/types/mongoose/mongoose-tests.ts
@@ -1420,6 +1420,7 @@ var MongoModel = mongoose.model('MongoModel', new mongoose.Schema({
     required: true
   }
 }), 'myCollection', true);
+MongoModel.init().then(cb);
 MongoModel.find({}).$where('indexOf("val") !== -1').exec(function (err, docs) {
   docs[0].save();
   docs[0].__v;