The talk is about how modern apps are being developed using technologies like Meteor JS. The talk explores tips using Meteor and opportunities for developing Meteor + Python applications. Introduction to Meteor Patterns in development Meteor and Python

1. Intro to
@PyGotham Aug 15-16
by @ewenchristie

2. 3 Part Discussion
1. Introduction to
2. Patterns in development
3. Meteor + Python

3. What is ?
● 100% Pure Javascript Full Stack
● Open Source
● Web and Mobile Apps Dev Platform
● Focus on apps, Not infrastructure
● www.meteor.com

4. Who backs ?
● Meteor Development Group
○ Active development by full time employees
● $20 Million series B - May 2015
● Revenue Product: Galaxy (official host)
● Meteor platform is opensource (MIT license)
○ You own the code; Host anywhere

5. The Basics
● Javascript (ES2015)
● MongoDB: Node.js
○ https://university.mongodb.com/
○ Schema-less Design
● HTML, CSS
○ Bootstrap
● Git/GitHub
● Node.JS (e.g., asynchronous, callbacks)

6. Code DEMO
● curl https://install.meteor.com/ | sh
● meteor create --example todos
● cd todos
● meteor
● meteor mongo
● meteor deploy PyGotham2015.meteor.com
Another example:
● meteor create --example localmarket

7. Architecture

8. Database Schema Design
Just build App → Let schema evolve
When to Denormalize
○ 1 : 1 → embed
○ 1 : few → embed
○ many : many → link

9. Reactive Patterns using observeChanges
Meteor.startup(function() {
observeChanges
})
== OR ==
observeChanges in the top level code.

10. Example: publish / subscribe
// SERVER
Meteor.publish("counts-by-room", function (roomId) {
var handle = Messages.find({roomId: roomId}).observeChanges({
added: function (_id) {
// Do something
},
changed: function (_id) {
// Do something
}
});
})
// CLIENT
Tracker.autorun(function () {
Meteor.subscribe("counts-by-room", Session.get("roomId"));
});

11. Observe and ObserveChanges

12. Function parameters
myCollection.find({}).observeChanges({
added: function(id, fields) {
//Do something
}
});
id = _id in the MongoDB
fields → Changed fields only

13. AtmosphereJS.com

14. How to use packages
● meteor search <search-terms>
● meteor add <package-name>
● meteor list
● gitHub
○ README.md

15. Search Patterns
● Search (Google, Yahoo!, Bing)
● Find command (CTRL + f)
Page level
Directory
● grep command
Ex: “grep -R signIn --exclude-dir=".meteor*”

16. Playgrounds
● Experiment queries on the command line
○ meteor mongo
● Create small experiment applications
○ meteor create myExperiment

17. CRUD
● Create
● Read
● Update
● Delete

18. Production Servers
● yourApp.meteor.com
● Digital Ocean
● Modulus
● Heroku
● Galaxy (coming soon)

19. Meteor + Python
● https://pypi.python.org/pypi/python-meteor
● http://meteorpedia.
com/read/DDP_Clients#Python
● https://www.youtube.com/watch?
v=zzphV5C_20E
● pip install python-meteor

20. Challenges
● Unlearning
○ Relational vs. NoSQL
○ Iterative vs. Reactive
● Documentation (need more official docs)
● Scaling (similar to other platforms)
● Keeping up with active changes
● Accessibility to online information

21. Why Javascript?
Geoff Schmidt: Javascript State of the Union

22. Why learn a new platform?
● Learn a new programming language every
year
● Opportunity to learn different points of view
○ Examples such as Pythonic approaches
○ LearnYouNode
○ Security (Why Meteor doesn’t use cookies?)

23. What’s next?
● Meteor 1.2 (Summer 2015)
● Galaxy (production meteor deploy)
● REST, microservices, ES2015 modules, +
● Reactive Database support for Redis & SQL
● Vote on Meteor’s Roadmap
○ https://trello.com/b/hjBDflxp/meteor-roadmap
● Meteor-NY Meetup

24. Resources
AtmosphereJS.com
GitHub
ATOM.io
http://js2.coffee/
https://www.meteor.com/tools/resources
https://github.com/awatson1978/meteor-
cookbook

25. THANKS!