Mongo无法创建数据库

Question

I have some problems working with mongo(mongoose on nodeJS), i think these are newbie questions, but i am new to this stuff and i am learning the beginning steps, basically i created a schema on nodeJS and connected the app to mongoDB. Below is my code for that:

var config = require('./config');
var mongoose = require('mongoose');
var connectionString = "mongodb://localhost:27017/ShareIdea"

module.exports = function(){
    mongoose.Promise = global.Promise;
    var db = mongoose.connect(connectionString);

    require('../app/models/user.server.model');

    return db;
};

then on the server side, i instantiate the mongoose, but my main problem is with the form, i want to post the data. my form is this:

<form class="form" action="/users" method="POST">
            <div class="some-class">
                <input type="radio" class="radio" name="userChoice" value="programmer" id="y" />
                <label for="y">Programmer</label>
                <input type="radio" class="radio" name="userChoice" value="inovator" id="z" />
                <label for="z">Inovator</label>
            </div>
            <input class="inp" type="text" name="firstname" placeholder="First Name">
            <input class="inp" type="text" name="lastname" placeholder="Last Name">
            <input class="inp" type="text" name="userame" placeholder="Username">
            <input class="inp" type="email" name="email" placeholder="Email">
            <input class="inp" type="password" name="password" placeholder="Password">
            <input type="submit" class="submit inp" value="Submit">
        </form>

this calls my router that works well, in my schema i set the names to be the same as here:

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var UserSchema = new Schema({
    firstname:String,
    lastname:String,
    email:String,
    username:String,
    password:String,
    userChoice: {type: String, possibleValues: ['programmer','Inovator']}
});

mongoose.model('User',UserSchema);

So my database is not creating on its own as i read in other websites, so i typed

'use shareIdeas'

in the cmd to create the database, writing

show dbs

does not show my create database, when i save the form data i don't know if i am actually saving the data, since i don't have the database, i have no idea if it is saving in a different place.

here is how i save the form data:

var User = require('mongoose').model('User');

module.exports = {

  create: function(req,res){
  var user = new User(req.body);

  user.save(function (err) {
      if (err) {
          return next(err);
      }
      res.json(user);
  });


 },

};

Answer 1

So here change the user to User.And pass the user which contains the data to save.

var User = require('mongoose').model('User');

module.exports = {

  create: function(req,res){
  var user = new User(req.body);

  User.save(user, function (err) {
      if (err) {
          return next(err);
      }
      res.json(user);
  });


 },

};

Answer 2

Here is the working code.

Call the open (connectToMongoDatabase) and close (closeMongoConnection) connection functions defined in the module in post method.

var express = require('express');
var mongoose = require('mongoose');
var connectionString = "mongodb://localhost:27017/ShareIdea"

module.exports = {

    connectToMongoDatabase: function () {
        mongoose.Promise = global.Promise;
        mongoose.connect(connectionString);
        console.log("MongoDB connected ...");        
    },

    closeMongoConnection : function () {
        mongoose.connection.close();
    }
};

var app = express();

var bodyParser = require('body-parser');
var app = express();
var urlencoded_body_parser = bodyParser.urlencoded({
    extended: true
});

app.use(urlencoded_body_parser);

var Schema = mongoose.Schema;

var UserSchema = new Schema({
    firstname: String,
    lastname: String,
    email: String,
    username: String,
    password: String,
    userChoice: { type: String, possibleValues: ['programmer', 'Inovator'] }
});

var UserModel = mongoose.model('User', UserSchema);

var exports = module.exports;

app.post("/users", function (req, res) {

    console.log(exports);
    exports.connectToMongoDatabase();
    console.log(req.body);
    var user = new UserModel(req.body);

    user.save(function (err, success) {
        console.log(err);
        if (err) {
            console.log(err);
            res.send(err);
        }
        else {
            console.log("inserted.......");
            console.log(success);
            res.json(success);
        }
        exports.closeMongoConnection();
    });

});

app.listen(3000);

The above code has been tested successfully.

Answer 3

You created the database with the name ShareIdea but you are giving use shareIdeas how can this query shows the data in database that you have created.You should use like this use ShareIdea .You want to see that your database is created or not using show dbs this query shows the databases that had the data within it.I created the database in config.js file:

module.exports = {
'mongoUrl' : 'mongodb://localhost:27017/live_stream'
}

and in my app.js file I gave connection to database and server file

var config = require('./config');
var mongoose = require('mongoose');
var db = mongoose.connection;
mongoose.connect(config.mongoUrl);
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function () {
console.log("Connected correctly to server");
});

after creating the schema you should import into the server file ie, app.js

var User= require('./models/User');