sails logging to file

Question

Can someone provide an example of how to configure sails.js to log to a file?

It seems like it should be straightforward, but I\'m having trouble finding examples on

Answer 1

For winston 3.x.x versions

@djsadinoff's answer not works.

Instead do:

 $ npm install winston

Replace your config/log.js file with the following code in Sails.js

    var winston = require('winston');
    const logger = winston.createLogger({
      level: 'silly',
      format: winston.format.json(),
      transports: [
        //
        // - Write to all logs with level `info` and below to `combined.log`
        // - Write all logs error (and below) to `error.log`.
        //
        new winston.transports.File({ filename: 'error.log', level: 'error' }),
        new winston.transports.File({ filename: 'sails.log' })
      ]
    });

    //
    // If we're not in production then log to the `console` with the format:
    // `${info.level}: ${info.message} JSON.stringify({ ...rest }) `
    //
    if (process.env.NODE_ENV !== 'production') {
      logger.add(new winston.transports.Console({
        format: winston.format.simple()
      }));
    }

    module.exports.log = {
      /***************************************************************************
      *                                                                          *
      * Valid `level` configs: i.e. the minimum log level to capture with        *
      * sails.log.*()                                                            *
      *                                                                          *
      * The order of precedence for log levels from lowest to highest is:        *
      * silly, verbose, info, debug, warn, error                                 *
      *                                                                          *
      * You may also set the level to "silent" to suppress all logs.             *
      *                                                                          *
      ***************************************************************************/

      // Pass in our custom logger, and pass all log levels through.
      custom: logger,
      level: 'silly',

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

Then do

$ sails lift

Answer 2

According to the source code, for v0.9.x, you just have to set the filePath in your config/log.js:

module.exports = {
  log: {
    level: 'info',
    filePath: 'application.log'
  }
};

Answer 3

Logging to a file doesn't work out of the box. You need to invoke functionality in libraries two levels down. See the documentation for winston.

first install winston like so:

$ npm install winston

Then adjust config/log.js to look as follows

var winston = require('winston');

/*see the documentation for Winston:  https://github.com/flatiron/winston */
var logger = new(winston.Logger)({
  transports: [
    new (winston.transports.Console)({}),
    new (winston.transports.File)({
      filename: 'logfile.log',
      level: 'verbose',
      json: false,
      colorize: false
    })
  ]
});

module.exports.log = {
  /***************************************************************************
   *                                                                          *
   * Valid `level` configs: i.e. the minimum log level to capture with        *
   * sails.log.*()                                                            *
   *                                                                          *
   * The order of precedence for log levels from lowest to highest is:        *
   * silly, verbose, info, debug, warn, error                                 *
   *                                                                          *
   * You may also set the level to "silent" to suppress all logs.             *
   *                                                                          *
   ***************************************************************************/

  level: 'silly',
  colorize: false,
  custom: logger
};