I can not relate MongoDB to Node

There are some problems with your code, I tried to solve the ones that generate errors ...;)

  

You are statically serving the /app/views folder, which, at first, should only be used by engine (I commented this section):

// app.use(express.static('./app/views'));

  

Next, you have a app.get of page quemsomos , which is preventing the second app.get below rendering (also commented this section):

/*
app.get('/quemsomos', function(req, res) {
        res.render('quemsomos');
    });
*/

  

In your app.post , you're setting in the res function, and trying to call resp - but that's fine, remove the two lines, and replace with res.redirect('/quemsomos'); :

app.post('/quemsomos', function(req,res){
     var novoPost = new Coment(
        {
            Nome: req.body.Nome,
            comentarios:req.body.comentarios,
        }
    );
    novoPost.save();
    res.redirect('/quemsomos');
    // res.render("quemsomos"); // removido
    // res.end(); // removido
});

  

Your schema is using Nome and Comentários as a key - and its app.post , is comentarios , no accent and lowercase letter. Take the accent, and leave both with a capital letter, to stay as Nome . Also, in view , you are using Coment and not comentarios - I changed in server not to touch view , but I suggest the opposite.

var novoPost = new Coment(
    {   
        Nome: req.body.Nome,
        Comentarios: req.body.Coment, // <- é Coment na view
    }
);

  

Remove the accent here:

var Post = mongoose.Schema({
    Nome: "String",
    Comentarios: "String", // <- estava com acento
});

  

Follow the code changed below - but all pages that were not part of the DB interaction were removed - you'd better follow the step-by-step instructions above. The idea is that it works without having to tinker with view (for testing):

var http = require('http');
var express = require("express");
require("ejs");
var bodyparser = require('body-parser');
var mongoose = require("mongoose");
var app = express();

var Post = mongoose.Schema({
    Nome: "String",
    Comentarios: "String",
});

var Coment = mongoose.model('Coment', Post);
var mongo = mongoose.connect('mongodb://localhost/Comentarios');

app.use(express.static('./public'));
app.set('views' , './app/views');
app.set('view engine','ejs');
app.use(bodyparser());

app.post('/quemsomos', function(req,res){
     var novoPost = new Coment(
        {   Nome: req.body.Nome,
            Comentarios: req.body.Coment,
        }
    );
    novoPost.save();
    res.redirect('/quemsomos');
});

app.get("/quemsomos", function(req, resp){
    Coment.find(function(err, resultado){
        resp.render("quemsomos", { resultado: resultado} );
        resp.end();
    });
});

var meuServidor=http.createServer(app);
meuServidor.listen(8080);
console.log("Servidor Rodando" );

  

Posts working:

I drop a part of the code, since it did not pass the error. Have you created a schema?

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var commentSchema = new Schema({
  Nome: { String, , required: true }
  comentarios: { type: String, required: true}
});

The link below shows an example of how to do it. link Tell me if it worked .. abs