Simple Chat Room in NodeJS, expressJS and mongoDB in Docker Swarm
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4 years ago
'use strict';
const Aspect = require('./operation').Aspect;
const defineAspects = require('./operation').defineAspects;
const CommandOperation = require('./command');
const applyWriteConcern = require('../utils').applyWriteConcern;
const handleCallback = require('../utils').handleCallback;
class DropIndexOperation extends CommandOperation {
constructor(collection, indexName, options) {
super(collection.s.db, options, collection);
this.collection = collection;
this.indexName = indexName;
}
_buildCommand() {
const collection = this.collection;
const indexName = this.indexName;
const options = this.options;
let cmd = { dropIndexes: collection.collectionName, index: indexName };
// Decorate command with writeConcern if supported
cmd = applyWriteConcern(cmd, { db: collection.s.db, collection }, options);
return cmd;
}
execute(callback) {
// Execute command
super.execute((err, result) => {
if (typeof callback !== 'function') return;
if (err) return handleCallback(callback, err, null);
handleCallback(callback, null, result);
});
}
}
defineAspects(DropIndexOperation, Aspect.WRITE_OPERATION);
module.exports = DropIndexOperation;