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node.js/express/mongoose noob issue


node.js/express/mongoose noob issue

By : user2952271
Date : November 19 2020, 12:41 AM
like below fixes the issue You have two options here:
1) deal with callback hell (callback inside callback inside...) to retrieve 3 sets of data. This way is least elegant and efficient
code :
var async = require('async');

..........

app.get('/dashboard', isLoggedIn, function(req, res) {
    var Group = require('../app/models/group'); //adding mongoose Schema
    var User = require('../app/models/user'); //adding mongoose Schema
    var Files = require('../app/models/files'); //adding mongoose Schema
    async.parallel({
       groups: function(callback){
           Group.find(...).exec(callback);
       },
       users: function(callback){
           Users.find(...).exec(callback);
       },
       files: function(callback){
           Files.find(...).exec(callback);               
       }
    }, function(err, results) {
       if (err)
            res.send(err);

       var groups = results.groups;
       var users = results.users;
       var files = results.files;

       res.render('dashboard.ejs', {
            user : req.user,
            myGroups : groups,
            users: users,
            files: files
        });
    });
});


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.post Node.js/Express/Mongoose call, not saving posts (.save) after the first post.. Further updated, Closures Issue?

.post Node.js/Express/Mongoose call, not saving posts (.save) after the first post.. Further updated, Closures Issue?


By : Wesley M.
Date : March 29 2020, 07:55 AM
wish helps you With AJAX/Node.js/Express/Mongoose/MongoDB, the data is being delivered successfully over ajax to node.js and is logging properly, but only the first post is being saved in MongoDB.. , Try changing the save() function to:
code :
// save the message, and check for errors
message.save(function(err, result) {

    if (err) {
        console.log(err);
        res.send(err);
    }
    console.log("The result: ", result);
    res.json({ message: 'Message "' + message.message + '" Created' });

});
Mongoose (express, node, mongo) scope issue with findOne()

Mongoose (express, node, mongo) scope issue with findOne()


By : Syed Abdulrahim
Date : March 29 2020, 07:55 AM
this will help Your blogUserId is not set when your Blog.find() is called. You'd have to nest it differently, something like this:
code :
var blogUserId;
blogs.forEach(function(blog, index) {
  User.findOne({'username': blog.username}, function(err, user) {
    blogUserId = user._id;
    console.log(blogUserId);

    Blog.find({'title': blog.title}, function(err, blogs) {
      if (!err && !blogs.length) {
        console.log(blogUserId);
        Blog.create({title: blog.title, author: blogUserId, body: blog.body, hidden: blog.hidden});
      }
      if (err) {
        console.log(err);
      }
    });

  });

});
Noob - API getting stuck in a simple GET (express,node)

Noob - API getting stuck in a simple GET (express,node)


By : Purpwood
Date : March 29 2020, 07:55 AM
it fixes the issue If your repo is up-to-date, then you are not connecting your app with your database. Add the following code in your app replacing the database with your own database:
code :
mongoose.connect('mongodb://localhost:27017/database', {useNewUrlParser: true});
Node.JS / Express / Mongodb/Mongoose Simple Connection Issue

Node.JS / Express / Mongodb/Mongoose Simple Connection Issue


By : Baptiste
Date : March 29 2020, 07:55 AM
this one helps. Hi There: I'm new to Node/Mongo/Express, etc and trying to get a simple connection to a mongodb through mongoose. At this point I'm just trying to establish a connection but get the error: , And check the require path, try just :
Mongoose connect method fails on simple Node Server. Express, Mongoose, Path

Mongoose connect method fails on simple Node Server. Express, Mongoose, Path


By : Akila Rathnavel
Date : March 29 2020, 07:55 AM
I wish did fix the issue. You need to actually successfully get mongod running and listening for connections. Just type mongod with no options, hit ENTER, and let it run. Then in a separate terminal start your express app. Note that mongod is the mongodb server daemon whereas mongo is the command line client where you can run an interactive REPL and issue database commands.
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