modifiedPaths.js•845 B
'use strict';
const _modifiedPaths = require('../common').modifiedPaths;
/**
* Given an update document with potential update operators (`$set`, etc.)
* returns an object whose keys are the directly modified paths.
*
* If there are any top-level keys that don't start with `$`, we assume those
* will get wrapped in a `$set`. The Mongoose Query is responsible for wrapping
* top-level keys in `$set`.
*
* @param {Object} update
* @return {Object} modified
*/
module.exports = function modifiedPaths(update) {
const keys = Object.keys(update);
const res = {};
const withoutDollarKeys = {};
for (const key of keys) {
if (key.startsWith('$')) {
_modifiedPaths(update[key], '', res);
continue;
}
withoutDollarKeys[key] = update[key];
}
_modifiedPaths(withoutDollarKeys, '', res);
return res;
};