code.js

var mongoose = require('mongoose');
var db = mongoose.connect('mongodb://localhost/mydb');

var Schema = mongoose.Schema;
var Posts = new Schema({
    name : String,
    subject: String,
    comment : String,
    password: String,
});
mongoose.model('Post', Posts);

function createNewPost(){
    var Post = mongoose.model('Post');
    var post = new Post();
    post.subject='hshja';
    post.comment ='ahsjashjas';
    post.save(function(err){
        if(!err){
            console.log('Post saved.');
        }
    });
}

function findPosts(amount){
    var Post = mongoose.model('Post');
    Post.find({).limit(amount).each(function(err,post){
        if(post!=null){
            Console.log(post.subject);
        }
    });
}