javascript - Nedb Multiple Collection Single Datastore - Stack Overflow

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I am a new to nedb. Its a kinda what sqlite is for sql munity but for the node.js munity. []

I wanted to ask is possible to have multiple collections in a single database file (datastore). If there is, could please show me some code sample on how to go about it? I have tried this:

var Datastore = require('nedb'),
    databaseURL="tudls.db",
    db = new Datastore({filename: databaseURL, autoload: true});

This creates a single datastore called db. From the documentation, I saw that nedb is mongo-like. So to insert a record I tried this:

 app.post('/todos', function(req, res){
        var task = req.body.text;
        db.todols.insert({text: task, done: false}, function(err, saved){
            if(err||!saved){
                res.send("Task not saved...");
            }
            res.send("Task saved...");});
    });

However, I get a 'cannot call method insert of undefined.' I thought that if I call the collection name (todols) when inserting a record it would work so that I can proceed to add another collection to the datastore (db.user) but I was mistaken.

Hence, is it possible to have multiple collections in a single datastore or am I to have a datastore for each collection? If it is possible, does anyone know how to achieve this? Thank you...

I am a new to nedb. Its a kinda what sqlite is for sql munity but for the node.js munity. [https://github./louischatriot/nedb]

I wanted to ask is possible to have multiple collections in a single database file (datastore). If there is, could please show me some code sample on how to go about it? I have tried this:

var Datastore = require('nedb'),
    databaseURL="tudls.db",
    db = new Datastore({filename: databaseURL, autoload: true});

This creates a single datastore called db. From the documentation, I saw that nedb is mongo-like. So to insert a record I tried this:

 app.post('/todos', function(req, res){
        var task = req.body.text;
        db.todols.insert({text: task, done: false}, function(err, saved){
            if(err||!saved){
                res.send("Task not saved...");
            }
            res.send("Task saved...");});
    });

However, I get a 'cannot call method insert of undefined.' I thought that if I call the collection name (todols) when inserting a record it would work so that I can proceed to add another collection to the datastore (db.user) but I was mistaken.

Hence, is it possible to have multiple collections in a single datastore or am I to have a datastore for each collection? If it is possible, does anyone know how to achieve this? Thank you...

• javascript
• node.js
• mongodb
• nedb

Share Improve this question Follow edited May 31, 2014 at 4:55 Neil Lunn 151k3636 gold badges355355 silver badges325325 bronze badges asked May 31, 2014 at 4:51 AdwinAdwin 19522 gold badges66 silver badges2121 bronze badges

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2 Answers 2

Sorted by: Reset to default 10

This really is a "lite" interpretation of MongoDB and as such there really isn't the same concept of "databases" and "collections" that exists in the full featured product, as well as omitting a lots of other features.

If you want things to appear as if you do have various "collections", then as suggested in the manual page you define various DataStore objects within a structure to make things look that way:

var db = {};
db.todols = new DataStore('/path/to/todols.db');
db.other = new DataStore('/path/to/other.db');

That makes it appear that you have "collections" which are in fact to "neDB" actually just DataStore objects.

//create multiple collections

var Datastore = require('nedb');
var db = {};
db.users = new Datastore('path/to/users.db');
db.robots = new Datastore('path/to/robots.db');

//access it

db.users.loadDatabase();
db.robots.loadDatabase();

//find some documents

db.users.find({name: "john"}, function (err,docs){ console.log(docs); }); 

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