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svrjs-blog-newsletter/backend/node_modules/mongodb/lib/operations/count_documents.js
2024-05-26 22:54:55 +02:00

37 lines
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1.4 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.CountDocumentsOperation = void 0;
const aggregate_1 = require("./aggregate");
/** @internal */
class CountDocumentsOperation extends aggregate_1.AggregateOperation {
constructor(collection, query, options) {
const pipeline = [];
pipeline.push({ $match: query });
if (typeof options.skip === 'number') {
pipeline.push({ $skip: options.skip });
}
if (typeof options.limit === 'number') {
pipeline.push({ $limit: options.limit });
}
pipeline.push({ $group: { _id: 1, n: { $sum: 1 } } });
super(collection.s.namespace, pipeline, options);
}
execute(server, session, callback) {
super.execute(server, session, (err, result) => {
if (err || !result) {
callback(err);
return;
}
// NOTE: We're avoiding creating a cursor here to reduce the callstack.
const response = result;
if (response.cursor == null || response.cursor.firstBatch == null) {
callback(undefined, 0);
return;
}
const docs = response.cursor.firstBatch;
callback(undefined, docs.length ? docs[0].n : 0);
});
}
}
exports.CountDocumentsOperation = CountDocumentsOperation;
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