Edit Page

sails.config.log

Configuration for the logger in your Sails app. These settings apply whenever you call functions like sails.log.debug() or sails.log.error() in your app code, as well as when Sails logs a message to the console automatically. The options here are conventionally specified in the config/log.js configuration file.

Properties

Property	Default	Details
`level`	`'info'`	Set the level of detail to be shown in your app's log
`inspect`	`true`	Set to false to disable captain's log's handling of logging, logs will instead be passed to the configured custom logger
`custom`	`undefined`	Specify a reference to an instance of a custom logger (such as winston). If provided, instead of logging directly to the console, the functions exposed by the custom logger will be called, and log messages from Sails will be passed through. For more information, see captains-log.

Using a Custom Logger

It can sometimes be useful to configure a custom logger-- particularly for regulatory compliance and organizational requirements (i.e. if your company is using a particular logger in other apps.) In the context of Sails, configuring a custom logger also allows you to intercept all log messages automatically created by the framework, which is handy for setting up email notifications about errors and warnings.

But don't feel like you have to use a custom logger if you want these sorts of notifications! In fact, there are usually more straightforward ways to implement features like automated Slack, SMS, or email notifications whenever errors occur. For example, one approach is to customize your app's default server error response (responses/serverError.js). Another popular option is using a monitoring service like AppDynamics or NewRelic.

Here's an example of configuring winston as a custom logger, defining both a console transport and file transport:

// config/log.js

var winston = require('winston');
var customLogger = new winston.Logger();

// A console transport logging debug and above.
customLogger.add(winston.transports.Console, {
  level: 'debug',
  colorize: true
});

// A file based transport logging only errors formatted as json.
customLogger.add(winston.transports.File, {
  level: 'error',
  filename: 'filename.log',
  json: true
});

module.exports.log = {
  // Pass in our custom logger, and pass all log levels through.
  custom: customLogger,
  level: 'silly',

  // Disable captain's log so it doesn't prefix or stringify our meta data.
  inspect: false
};

Is something missing?

If you notice something we've missed or could be improved on, please follow this link and submit a pull request to the sails-docs repo. Once we merge it, the changes will be reflected on the website the next time it is deployed.

Documentation

Reference

Built with Love

The Sails framework is maintained by a web & mobile studio in Austin, TX, with the help of our contributors. We created Sails in 2012 to assist us on Node.js projects. Naturally we open-sourced it. We hope it makes your life a little bit easier!