CODEWITHSUNDEEP
node.jsexpresswinston
user2749751
user2749751

Reputation: 405

Node winston cannot support multiple file transport?

I want to show error logs in one file and all logs in another file. To do that, I wrote two file transports which give the following error on compilation:

 'use strict';

var winston = require('winston'),   
  config = require('./config');

var logger = new (winston.Logger)({
transports: [
  new (winston.transports.Console)({level:'debug',handleExceptions: true,prettyPrint: true,silent:false,timestamp: true,colorize: true,json: false}),
  new (winston.transports.File)({ filename: './server/logs/bv_common.log',level:'debug',maxsize: 1024000,maxFiles: 10, handleExceptions: true,json: false}),
  new (winston.transports.File)({ filename: './server/logs/bv_error.log',level:'debug',maxsize: 1024000,maxFiles: 10, handleExceptions: true,json: false,level:'error'})

]
  });


module.exports = logger;

Result:

   [ 'Error: Transport already attached: file',

Upvotes: 6

Views: 4722

Answers (2)

SpacePope
SpacePope

Reputation: 1423

You are getting this error because you are not providing a 'name' attribute to your file transports.

Upvotes: 9

user2749751
user2749751

Reputation: 405

var logger = new (winston.Logger)({
exitOnError: false, //don't crash on exception
transports: [
  new (winston.transports.Console)({level:'debug',handleExceptions: true,prettyPrint: true,silent:false,timestamp: true,colorize: true,json: false}),
  new (winston.transports.File)({ filename: './server/logs/' + config.appname +'_common.log',name:'file.all',level:'debug',maxsize: 1024000,maxFiles: 10, handleExceptions: true,json: false}),
  new (winston.transports.File)({ filename: './server/logs/' + config.appname +'_error.log',name:'file.error',level:'error',maxsize: 1024000,maxFiles: 10, handleExceptions: true,json: false})
]
  });

The above code , especially with name parameter for shared transport, we can use multiple file transports for loggers.

Upvotes: 11

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