Merge pull request #14576 from lonsenluo/master

[mongoose] add unwind method with new params type

mongoose/index.d.ts

@@ -2163,6 +2163,11 @@ declare module "mongoose" {
      * @param fields the field(s) to unwind
      */
     unwind(...fields: string[]): this;
+    /**
+     * Appends new custom $unwind operator(s) to this aggregate pipeline
+     * new in mongodb 3.2
+     */
+    unwind(...opts: { path: string, includeArrayIndex?: string, preserveNullAndEmptyArrays?: boolean }[]): this;
   }
 
   /*

mongoose/mongoose-tests.ts

@@ -1016,7 +1016,41 @@ aggregate.sort('field -test');
 aggregate.then(cb).catch(cb);
 aggregate.unwind("tags").unwind('tags');
 aggregate.unwind("a", "b", "c").unwind('tag1', 'tag2');
-
+aggregate.unwind(
+  {
+    path: "tags",
+    includeArrayIndex: "idx",
+    preserveNullAndEmptyArrays: true
+  })
+  .unwind({
+    path: "tags",
+    includeArrayIndex: "idx",
+    preserveNullAndEmptyArrays: true
+  });
+aggregate.unwind(
+  {
+    path: "a",
+    includeArrayIndex: "idx",
+    preserveNullAndEmptyArrays: true
+  }, {
+    path: "b",
+    includeArrayIndex: "idx",
+    preserveNullAndEmptyArrays: true
+  }, {
+    path: "c",
+    includeArrayIndex: "idx",
+    preserveNullAndEmptyArrays: true
+  })
+  .unwind({
+    path: "tag1",
+    includeArrayIndex: "idx",
+    preserveNullAndEmptyArrays: true
+  }, {
+    path: "tag2",
+    includeArrayIndex: "idx",
+    preserveNullAndEmptyArrays: true
+  });
+  
 /*
  * section schematype.js
  * http://mongoosejs.com/docs/api.html#schematype-js