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41 lines
798 B
JavaScript
41 lines
798 B
JavaScript
'use strict';
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const isDefiningProjection = require('./isDefiningProjection');
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/**
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* Determines if `path` is excluded by `projection`
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*
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* @param {Object} projection
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* @param {String} path
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* @return {Boolean}
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* @api private
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*/
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module.exports = function isPathExcluded(projection, path) {
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if (projection == null) {
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return false;
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}
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if (path === '_id') {
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return projection._id === 0;
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}
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const paths = Object.keys(projection);
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let type = null;
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for (const _path of paths) {
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if (isDefiningProjection(projection[_path])) {
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type = projection[path] === 1 ? 'inclusive' : 'exclusive';
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break;
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}
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}
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if (type === 'inclusive') {
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return projection[path] !== 1;
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}
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if (type === 'exclusive') {
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return projection[path] === 0;
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}
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return false;
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};
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