allow QueryOptions populate parameter use PopulateOptions

Author: osmanakol

index.d.ts

@@ -1079,7 +1079,7 @@ declare module 'mongoose' {
     omitUndefined?: boolean;
     overwrite?: boolean;
     overwriteDiscriminatorKey?: boolean;
-    populate?: string;
+    populate?: string | string[] | PopulateOptions | PopulateOptions[];
     projection?: any;
     /**
      * if true, returns the raw result from the MongoDB driver

test/typescript/queries.ts

@@ -1,13 +1,18 @@
-import { Schema, model, Document, Types, Query, Model, QueryWithHelpers } from 'mongoose';
+import { Schema, model, Document, Types, Query, Model, QueryWithHelpers, PopulatedDoc } from 'mongoose';
+import { ObjectId } from 'mongodb';
 
 interface QueryHelpers {
   _byName(this: QueryWithHelpers<any, ITest, QueryHelpers>, name: string): QueryWithHelpers<Array<ITest>, ITest, QueryHelpers>;
   byName(name: string): QueryWithHelpers<Array<ITest>, ITest, QueryHelpers>;
 }
 
+const childSchema: Schema = new Schema({ name: String });
+const ChildModel = model<Child>('Child', childSchema);
+
 const schema: Schema<ITest, Model<ITest, QueryHelpers>> = new Schema({
   name: { type: 'String' },
   tags: [String],
+  child: { type: 'ObjectId', ref: 'Child' },
   docs: [{ _id: 'ObjectId', id: Number, tags: [String] }],
   endDate: Date
 });
@@ -21,6 +26,9 @@ schema.query.byName = function(name: string): QueryWithHelpers<any, ITest> {
   return this._byName(name);
 };
 
+interface Child {
+  name: string;
+}
 interface ISubdoc extends Document {
   myId?: Types.ObjectId;
   id?: number;
@@ -31,13 +39,16 @@ interface ITest extends Document {
   name?: string;
   age?: number;
   parent?: Types.ObjectId;
+  child?: PopulatedDoc<Child & Document<ObjectId>>,
   tags?: string[];
   docs?: ISubdoc[];
   endDate?: Date;
 }
 
 const Test = model<ITest, Model<ITest, QueryHelpers>>('Test', schema);
 
+Test.find({}, {}, {populate:{path:"child", model:ChildModel, match:true}}).exec().then((res: Array<ITest>) => console.log(res))
+
 Test.find().byName('test').byName('test2').orFail().exec().then(console.log);
 
 Test.count({ name: /Test/ }).exec().then((res: number) => console.log(res));