SDHacks / hackxx-web-workshop

SD Hacks Hack Day

RESTful Routes

Name	Path	HTTP Verb	Purpose
Index	/	GET	List all the posts
New	/new	GET	Show a form to create new posts
Create	/	POST	Create a new post
Show	/:id	GET	Show a single post
Edit	/:id/edit	GET	Show a form to edit a post
Update	/:id	PUT	Update a particular post
Delete	/:id	DELETE	Delete a particular post

Code Snippets

Importing Package Dependencies

var express = require('express');
var bodyParser = require('body-parser');
var logger = require('morgan');
var PouchDB = require('pouchdb');

App Config

app.use(logger('dev'));
app.use(express.static(__dirname + '/public'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.disable('x-powered-by');
// Allowing CORS
app.use(function(req,res,next) {
  res.append('Access-Control-Allow-Origin', req.headers.origin || '*');
  res.append('Access-Control-Allow-Credentials', 'true');
  res.append('Access-Control-Allow-Methods', ['GET', 'OPTIONS', 'PUT', 'POST', 'DELETE']);
  res.append('Access-Control-Allow-Headers',
    'Origin, X-Requested-With, Content-Type, Accept');
  next();
});
app.enable('trust proxy');

DB Call to GET all posts

db.allDocs({
  include_docs: true,
  attachments: true
}, function(err, result) {
  // If there was an error, log it
  if (err) {
    console.log(err);
  }
  // Else render the 'posts' view and pass it all the posts
  else {
    res.status(200).json(result.rows);
  }
});

DB Call to Create a new post

db.post(post, function(err, created) {
  // If there was an error, log it
  if (err || !created) {
    console.log(err);
    res.sendStatus(500);
  } else {
    return res.status(201).json(created);
  }
});

DB Call to GET a single post

db.get(req.params.id, function(err, found) {
  // If there was an error, log it
  if (err || !found) {
    console.log('Something went wrong');
    res.sendStatus(500);
  }
  // Else the post was found
  else {
    res.status(200).json(found);
  }
});

DB Call to UPDATE a single post

db.get(req.params.id, function(err, found) {
  // If there was an error, log it
  if (err || !found) {
    console.log('Something went wrong');
    res.sendStatus(500);
  }
  // Else the post was found
  else {
    // Now save the updated post
    db.put({
      _id: found._id,
      _rev: found._rev,
      title: req.body.title,
      post: req.body.post
    }, function(err, saved) {
      // If there was an error, log it
      if (err || !saved) {
        console.log('Something went wrong');
        res.sendStatus(500);
      } else {
        res.status(201).json(saved);
      }
    });
  }
});

DB Call to DELETE a single post

db.get(req.params.id, function(err, found) {
  // If there was an error, log it
  if (err) {
    console.log(err);
    // Redirect to the '/' route
    res.sendStatus(500);
  }
  // Else the post was found
  else {
    // Remove the post from the database
    db.remove(found, function(err, removed) {
      // If there was an error, log it
      if (err) {
        console.log(err);
        res.sendStatus(500);
      } else {
        res.status(202).json(removed);
      }
    });
  }
});

Frontend stuff

How to make DOM manipulations (change html) with JQuery

$('.selector').html('Your new data');

How to initiate a request to the API

$.get('/posts/', function(data) {
  console.log(data);
});

You can place the DOM manipulation inside the callback like so

$.get('/posts/', function(data) {
  $('.selector').html(data);
});