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67 lines
2.5 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.DistinctOperation = void 0;
const utils_1 = require("../utils");
const command_1 = require("./command");
const operation_1 = require("./operation");
/**
* Return a list of distinct values for the given key across a collection.
* @internal
*/
class DistinctOperation extends command_1.CommandOperation {
/**
* Construct a Distinct operation.
*
* @param collection - Collection instance.
* @param key - Field of the document to find distinct values for.
* @param query - The query for filtering the set of documents to which we apply the distinct filter.
* @param options - Optional settings. See Collection.prototype.distinct for a list of options.
*/
constructor(collection, key, query, options) {
super(collection, options);
this.options = options ?? {};
this.collection = collection;
this.key = key;
this.query = query;
}
execute(server, session, callback) {
const coll = this.collection;
const key = this.key;
const query = this.query;
const options = this.options;
// Distinct command
const cmd = {
distinct: coll.collectionName,
key: key,
query: query
};
// Add maxTimeMS if defined
if (typeof options.maxTimeMS === 'number') {
cmd.maxTimeMS = options.maxTimeMS;
}
// we check for undefined specifically here to allow falsy values
// eslint-disable-next-line no-restricted-syntax
if (typeof options.comment !== 'undefined') {
cmd.comment = options.comment;
}
// Do we have a readConcern specified
(0, utils_1.decorateWithReadConcern)(cmd, coll, options);
// Have we specified collation
try {
(0, utils_1.decorateWithCollation)(cmd, coll, options);
}
catch (err) {
return callback(err);
}
super.executeCommand(server, session, cmd, (err, result) => {
if (err) {
callback(err);
return;
}
callback(undefined, this.explain ? result : result.values);
});
}
}
exports.DistinctOperation = DistinctOperation;
(0, operation_1.defineAspects)(DistinctOperation, [operation_1.Aspect.READ_OPERATION, operation_1.Aspect.RETRYABLE, operation_1.Aspect.EXPLAINABLE]);
//# sourceMappingURL=distinct.js.map