How to drop all collections via mongodb and node.js?

Question

I am new to node.js and mongodb and I have the following problem: I need to drop all collections from my mongodb from node.js file. I have such a function:

service.dropCollections = function(db, colls){
  for(var i = 0; i < colls.length; i++){
    var name = colls[i].name;
    db.dropCollection(name, function(err) {
        if(!err) {
            console.log( name + " dropped");
        } else {
            console.log("!ERROR! " + err.errmsg);
        }
    });
  }
}

And I am using it in the following function:

service.clearDB = function() {
var MongoClient = require('mongodb').MongoClient
, format = require('util').format;    

  MongoClient.connect('mongodb://127.0.0.1:27017/shiny_d', function(err, db){
    if(err) throw err;
    db.collectionNames(function(err, collections){
        if(!err){
            service.dropCollections(db, collections);
        } else {
            console.log("!ERROR! "+ err.errmsg);
        }
        service.showCollections();
    });
  });
}

As an output I have

!ERROR! ns not found

shiny_db.physicalinfos

Dunno what to do right now. I'll be very thankful for your help.

Answer 1

Ain't it more faster, easier and less error prone if you just drop the entire database?

db.dropDatabase();

At least from the Mongo CLI, whenever you access an inexistent DB, it'll be persisted the soon you create data. That's the same as dropping all collections from it.

I haven't tried MongoDB for anything except studying yet, so I don't know much about permissions. So, probably the only problem of dropping the entire DB would be the permissions of your users that would be lost (I believe).

If this script you're trying to create is not for production, then you're good to go with dropping the DB.