We'll follow this little technical planning list we made, and we can even make sub tasks for each major feature.

1. Create a post
   1. Make a posts#new route (/posts/new) and template (posts-new.handlebars)
   2. Add form to posts-new template
   3. Make create posts route and check that form data is sending to new route
   4. Add Post model with mongoose
   5. Confirm posts are saving to database
2. Show all posts
3. Show one post
4. Comment on posts
5. Create subreddits
6. Sign up and Login
7. Associate posts and comments with their author
8. Make comments on comments
9. Vote a post up
10. Vote a comment up
11. Sort posts by # of votes

New Post Form

To create a new instance of a resource, we first have to make a form. We'll follow RESTful routing and make the url match this pattern: /<<RESOURCE NAME PLURAL>>/new. So in the case of a resource Post, the path will be /posts/new.

Create this new route and have it render a new template posts-new.handlebars.

Now use the bootstrap form classes to add a form for an object with a title, url, and summary attributes. Your form should have an action that points to a create route => /posts.

Remember to put this form in the center 4 columns of a grid.

<div class="row">
  <div class="col-sm-4 col-sm-offset-4">
    <form action="/posts">
      <legend>New Post</legend>
      <div class="form-group">
        <label for="post-title">Title</label>
        <input type="text" name="title" class="form-control" id="post-title" placeholder="Title">
      </div>
      <div class="form-group">
        <label for="post-url">Url</label>
        <input type="url" name="url" class="form-control" id="post-url" placeholder="https://www.google.com">
      </div>
      <div class="form-group">
        <label for="post-summary">Summary</label>
        <textarea name="summary" class="form-control" id="post-summary" placeholder="Title"></textarea>
      </div>

      <div class='text-right'>
        <button type="submit" class="btn btn-primary">Reply<button>
      </div>

    </form>
  </div>
</div>

Submit the Form

Ok so what happens when you submit this form? No POST /posts route! Let's make it.

First make a new folder called controllers and in there put the file posts.js.

module.exports = function(app) {

  // CREATE
  app.post('/posts', function(req,res) {
    console.log(req.body)
  });

};

Now require this file in your server.js file and pass in the app variable as an argument.

  require('./controllers/posts.js')(app);

Now what happens when you submit the form. Is req.body defined? No? that's because you need to add the body parser module. Add that and get req.body to reflect your form inputs.

Saving to the Database

In order to interact with the MongoDB database we're going to use the npm module mongoose. Mongoose is the ODM - the Object Document Mapper. That means that it maps JavaScript objects in our application to documents in the database. The way Mongoose works is through schemas written in code called Models.

Create the folder models and inside put the post.js file. Here's a sample model for our Post resource.

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

var PostSchema = new Schema({
  title             : { type: String, required: true }
  , url             : { type: String, required: true }
  , summary         : { type: String, required: true }
});

module.exports = mongoose.model('Post', PostSchema);

Now that we have a model, we can require it at the top of our posts controller (controllers/posts.js):

var Post = require('../models/post');

And put it to use in our create posts endpoint:

var Post = require('../models/post');

module.exports = function(app) {

  // CREATE
  app.post('/posts', function (req, res) {
    // INSTANTIATE INSTANCE OF POST MODEL
    var post = new Post(req.body);

    // SAVE INSTANCE OF POST MODEL TO DB
    post.save(function (err, post) {
      // REDIRECT TO THE ROOT
      return res.redirect(`/`);
    })
  });

};

Confirming Posts are Saving

So we can save to the database but how can we be sure? There are a couple of ways, we could go into the mongo shell and inspect our database and see that the posts collection has documents in it. Or we can use a program called robomongo to graphically see our database and see what collections and documents we've created.

Use either the mongo shell or robomongo to confirm you are creating posts.

STRETCH: Adding Created At and Updated At attributes

Let's

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

var PostSchema = new Schema({
  createdAt       : { type: Date }
  , updatedAt       : { type: Date }

  , title           : { type: String, required: true }
  , url             :
  , summary         : { type: String, required: true }
});

PostSchema.pre('save', function(next){
  // SET createdAt AND updatedAt
  var now = new Date();
  this.updatedAt = now;
  if ( !this.createdAt ) {
    this.createdAt = now;
  }

  next();
});

module.exports = mongoose.model('Post', PostSchema);

Feedback

If you have feedback on this tutorial or find any mistakes, please open issues on the GitHub Repository or comment below.