sails lifecycle - custom service and config.log - sails.js

Question

I defined a l.js under /api/services
exports.i = sails.log.info;
exports.v = sails.log.verbose;
exports.err = sails.log.error;
exports.w = sails.log.warn;
exports.d = sails.log.debug;
It works fine but when I want to define custom logger in /config/log.js
let customLogger = new (winston.Logger)({
transports: [
new (winston.transports.Console, winston.transports.File)({
name: 'file.info',
level: 'info',
filename: logPath + '/server-info.log',
json: true
}),
new (winston.transports.Console, winston.transports.File)({
name: 'file.warning',
level: 'warning',
filename: logPath + '/server-warning.log',
json: true
}),
new (winston.transports.File)({
name: 'file.error',
level: 'error',
filename: logPath + '/server-error.log',
json: true
})
]
});
module.exports.log = {
level: 'info',
custom: customLogger,
};
When I use sails.log.error("123"); l.err("456") in controller, only "123" showed in server-error.log file. "456" only print to console.
When I check sails doc about lifecycle, it seems /config/log.js loaded before /api/services. How should I modify my code?
Thanks

Answer 1

Although config/log.js is loaded before api/services/l.js, (my feeling is) assignment of custom logger defined in log.js to sails.log.<level> happens after the service is loaded.
Hence the behavior.
Re-assigning on lifted event fixes this. Use this code in l.js:
exports.err = sails.log.error;
sails.on('lifted', function() {
console.log('lifted event');
// Re-assign here
exports.err = sails.log.error;
});
Do similarly for other methods of the service.