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The Rails 3.1 Leap@nathanbertram

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O.K its not that kind of a leap.

But there is lots ofimprovements & awesomenew stuff!

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GIST

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~~ Quick Poll ~~

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This talk is about what is new.

So... what isnew?

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ZOMG we have an NHL team again!

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jQuery is now default

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is now a first-class citizen.

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Powerful little language that compiles into JS.

INTO THIS:

TURNS:

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INTO THIS:

TURNS:

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Turns out you can remove that line from your Gemfile.

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To everyone ...

Dealt

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Asset Pipeline

ZOMG what does this mean?

Use tools like sass, coffeescript, compass, less & etc towrite css & js in separateorganized fashion.

Your css & js files (respectively) will beautomagicallybe concatenated andcompressed using Sprokets (getsprokets.com).

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Sprokets

Sprokets uses manifest files to determine whichassets to include and serve.

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Asset Pipeline

Assets are optimized out of the box whenyou deploy.

Saving precious KBs and less files for thebrowser to download - faster load time.

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- Send content to the browser before its finishedprocessing. Been around for ages in php, asp, etc.- Chunked Responses

Eg. Page takes 5 seconds to process. Stream the ... part; so the browser can start

loading js/css assets.

HTTP Streaming

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HTTP Streaming

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BCrypt (BRUTE force resistant)

With every request tohash - it gets slower

and slower ...

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https://github.com/rails/rails/blob/master/activerecord/lib/active_record/identity_map.rb

Identity Map

- Ensures that each object gets loaded only once bykeeping every loaded object in a map. Looks up

objects using the map.

- Disabled by default due to a couple recentdiscoveries.

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https://github.com/rails/rails/blob/master/activerecord/lib/active_record/identity_map.rbhttps://github.com/rails/rails/blob/master/activerecord/lib/active_record/identity_map.rbhttps://github.com/rails/rails/blob/master/activerecord/lib/active_record/identity_map.rbhttps://github.com/rails/rails/blob/master/activerecord/lib/active_record/identity_map.rbhttps://github.com/rails/rails/blob/master/activerecord/lib/active_record/identity_map.rb

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Reversible Migrations

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:bulk => true

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HTTP Basic Auth ... Little Better!

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Mass Assignment with Roles

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Awesome gist from Ryan Bates of RailsCasts.com!

https://gist.github.com/958283

Changelog Rails 3.1 beta 1:

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https://gist.github.com/958283https://gist.github.com/958283

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TIPS: Preparing to Upgrade

1. Upgrade your application to Rails 3.0.x

2. Have decent test coverage and have all tests are green3. Fixdeprecation warnings that show up.

4. Bump your rails version up and fix any red tests.5. (optional) setup asset pipeline

Handy Railscast:http://railscasts.com/episodes/282-upgrading-to-rails-3-1

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http://railscasts.com/episodes/282-upgrading-to-rails-3-1http://railscasts.com/episodes/282-upgrading-to-rails-3-1http://railscasts.com/episodes/282-upgrading-to-rails-3-1

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Thanks!