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