Mongojs print and console.log not working

Question

I am running the following command and I want to see the output in my out.log file but it is not printing anything.

   /tmp/mongodb/bin/mongo mydatabase_name /tmp/mongodb/scripts/test.js >> out.log

These are the contents in my test.js

db.system.js.save (
{   _id:"run_job",
    value: function() {

    console.log("in function");
    print("in function>>");
    db.myUser.find().forEach(
    function(eachuser){
        console.log("eachuser id" + eachuser._id);
        var lower_id = eachuser._id.toLowerCase();
        console.log("Lowercase id" + lower_id);
    });     
    }
}
 );

It give error : invoke failed: JS error : console is not defined. So it removed the console.log. But it still does not print using the print function. Thanks.

Answer 1

There is no console object defined in the MongoDB shell.

You'll need to use the print and printjson functions that are globally available.

print("Hi! I'm in your log!");

Anything printed will be emitted to the current log file. If there is no log file defined in your mongo configuration, then it will be emitted to the screen/stdout, which would allow you to pipe the results to a file if you wanted (or you might just want to use the log file generated by MongoDB).

If you had a bunch of code you were using that had console.log, you could build a polyfill that redirected the output via a print and printjson.