1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
'use strict';
const get = require('../get');const mpath = require('mpath');const parseProjection = require('../projection/parseProjection');
/*! * ignore */
module.exports = function removeDeselectedForeignField(foreignFields, options, docs) {  const projection = parseProjection(get(options, 'select', null), true) ||    parseProjection(get(options, 'options.select', null), true);
  if (projection == null) {    return;  }  for (const foreignField of foreignFields) {    if (!projection.hasOwnProperty('-' + foreignField)) {      continue;    }
    for (const val of docs) {      if (val.$__ != null) {        mpath.unset(foreignField, val._doc);      } else {        mpath.unset(foreignField, val);      }    }  }};