sails logging to file - 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 online.
I'm looking at changes in the config/log.js or the config/sockets.js files.

Answer 1

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 2

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
};

Answer 3

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