add objects on rails writeup

Author: Matt Swanson

_posts/2012-07-11-objects-on-rails.md

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+---
+layout: writeup
+title: "Objects on Rails"
+categories:
+- writeup
+---
+
+![](/static/objects-on-rails.jpg)  
+[Objects on Rails: Notes on flexible web application design][link]   
+Avdi Grimm       
+
+---
+
+**What's the point?**  
+This book takes the form of an "engineer's notebook" and examines a handful of 
+alternative OO-patterns to make your Rails applications more flexible and maintainable.
+
+**How was it?**  
+Though at times I felt in over my head, I really enjoyed the book. It was at the perfect
+intermediate level that I have been seeking lately. While I didn't fully grok everything,
+I can always return to the text when I do encounter some of the more subtle problems.
+
+The patterns discussed - particularly the `Exhibit` pattern - were new to me and the 
+author did a good job of showing the "before and after" versions to illustrate *why* you
+might want to use them.
+
+The sections on isolated, fast unit testing were helpful, though I'm still a bit 
+uncertain about when to use a `stub` vs `OpenStruct` vs `Object.new`. This is kind of a 
+trap topic for me, as I find I am sending too much time trying to figure out the 
+optimal way of doing TDD in Rails - instead of just getting my hands dirty first and 
+optimizing later.
+
+It was nice to see how topics I was familiar with from other contexts (dependency 
+injection, aggregate root) fit into a Rails app.
+
+**Who should read it?**  
+Anyone with interest in the on-going "how to do OO in Rails"; basic-to-intermediate
+Rails knowledge required to get the most out of this book
+
+[link]: http://objectsonrails.com/
+