This document provides an overview of developing web applications with Symfony2, Doctrine, and MongoDB. It discusses why Symfony2 and Doctrine are good choices, how to install them, and how to configure Doctrine to work with MongoDB. It then demonstrates building a simple image sharing application that stores and retrieves images from MongoDB using GridFS and allows commenting on images. It covers creating document schemas, controllers, and templates to upload images, view comments, and more. The document ends by discussing custom repositories, queries, and useful bundles to consider.

1. Developing Web Apps with
Symfony2, Doctrine and
MongoDB

2. Who Am I?
• Software Engineer at TechJini Solutions
• Working with PHP/Symfony for last 4 years
• @kertz on Twitter and Github

3. The Whys?
• Why Symfony2?
• Why Doctrine?

4. Symfony2
• Made of reusable components
•Acommunity that built Doctrine, Behat,
Composer, Assetic and more
• Thebackbone for future versions of Drupal &
phpBB

5. Doctrine
• Highly configurable
• Supports
MySQL, PgSQL, Oracle, SQlite,
MongoDB and CouchDB
• Doctrine Query Language

6. Installation
• ComposerDependency Manager (http://
getcomposer.org)
$ curl -s http://getcomposer.org/installer | php
$ php composer.phar create-project symfony/framework-
standard-edition sf-mongo 2.1.x-dev

7. Adding MongoDB
composer.json
{
"require": {
"doctrine/mongodb-odm-bundle": "3.0.*"
},
"minimum-stability": "dev"
}
$ composer.phar update doctrine/mongodb-odm-bundle
AppKernel.php

8. Configuration
config.yml
doctrine_mongodb:
connections:
default:
server: mongodb://localhost:27017
options: {}
default_database: sfmongo
document_managers:
default:
auto_mapping: true

9. Bundles
• Why Bundles?
• Creating your own bundles
$ app/console generate:bundle

10. Register Bundles
AppKernel.php

11. What are we building?
•A simple image sharing app
• Store/Retrieve images in/from GridFS
• Allow comments for images

12. The Document schema for images
Image.php

13. Controller for uploading images
ImageController.php

14. The template for uploading images
new.html.twig

15. Retrieving the images
ImageController.php

16. In Retrospect
•A form to upload an image and add caption
• Store images in MongoDB with GridFS
• Retrieve images
• That was quick, wasn’t it?

17. The Document schema for comments
Comment.php

18. Add a reference to comments
Image.php

19. Controller for comments
ImageController.php

20. Viewing comments for images
ImageController.php
comments.html.twig

21. In Retrospect (again)
• Allow comments for image
• Show comments for images by id

22. Repositories & DQL
• Create custom repositories
• Using Doctrine Query Builder

23. Repository for comments
CommentRepository.php

24. Set repository location
Comment.php

25. Calling Repository functions
CommentController.php

26. Bundles to watch
• SonataAdminBundle http://github.com/sonata-project/SonataAdminBundle
• FOSUserBundle http://github.com/FriendsOfSymfony/FOSUserBundle
• FOQElasticaBundle http://github.com/Exercise/FOQElasticaBundle

27. The End. Questions?