You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
874 B
38 lines
874 B
3 months ago
|
'use strict';
|
||
|
|
|
||
|
|
const isDefiningProjection = require('./isDefiningProjection');
|
||
|
|
const isPOJO = require('../isPOJO');
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* ignore
|
||
|
|
*/
|
||
|
|
|
||
|
|
module.exports = function isExclusive(projection) {
|
||
|
|
if (projection == null) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
const keys = Object.keys(projection);
|
||
|
|
let exclude = null;
|
||
|
|
|
||
|
|
if (keys.length === 1 && keys[0] === '_id') {
|
||
|
|
exclude = !projection._id;
|
||
|
|
} else {
|
||
|
|
for (let ki = 0; ki < keys.length; ++ki) {
|
||
|
|
// Does this projection explicitly define inclusion/exclusion?
|
||
|
|
// Explicitly avoid `$meta` and `$slice`
|
||
|
|
const key = keys[ki];
|
||
|
|
if (key !== '_id' && isDefiningProjection(projection[key])) {
|
||
|
|
exclude = isPOJO(projection[key]) ?
|
||
|
|
(isExclusive(projection[key]) ?? exclude) :
|
||
|
|
!projection[key];
|
||
|
|
if (exclude != null) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return exclude;
|
||
|
|
};
|