'use strict';
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const Aspect = require('./operation').Aspect;
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const defineAspects = require('./operation').defineAspects;
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const OperationBase = require('./operation').OperationBase;
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const executeCommand = require('./db_ops').executeCommand;
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const MongoError = require('../core').MongoError;
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const ReadPreference = require('../core').ReadPreference;
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class CreateIndexesOperation extends OperationBase {
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constructor(collection, indexSpecs, options) {
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super(options);
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this.collection = collection;
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this.indexSpecs = indexSpecs;
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}
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execute(callback) {
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const coll = this.collection;
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const indexSpecs = this.indexSpecs;
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let options = this.options;
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const capabilities = coll.s.topology.capabilities();
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// Ensure we generate the correct name if the parameter is not set
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for (let i = 0; i < indexSpecs.length; i++) {
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if (indexSpecs[i].name == null) {
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const keys = [];
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// Did the user pass in a collation, check if our write server supports it
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if (indexSpecs[i].collation && capabilities && !capabilities.commandsTakeCollation) {
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return callback(new MongoError('server/primary/mongos does not support collation'));
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}
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for (let name in indexSpecs[i].key) {
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keys.push(`${name}_${indexSpecs[i].key[name]}`);
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}
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// Set the name
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indexSpecs[i].name = keys.join('_');
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}
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}
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options = Object.assign({}, options, { readPreference: ReadPreference.PRIMARY });
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// Execute the index
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executeCommand(
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coll.s.db,
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{
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createIndexes: coll.collectionName,
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indexes: indexSpecs
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},
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options,
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callback
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);
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}
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}
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defineAspects(CreateIndexesOperation, Aspect.WRITE_OPERATION);
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module.exports = CreateIndexesOperation;
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