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# Name Comments Duration Released
115 Model Caching (revised) 426 comments 12 minutes May 13, 2013
22 Eager Loading (revised) 223 comments 7 minutes Mar 20, 2013
406 Public Activity 155 comments 10 minutes Feb 13, 2013
63 Model Name in URL (revised) 85 comments 9 minutes Dec 16, 2012
162 Tree-Based Navigation (revised) 93 comments 10 minutes Dec 01, 2012
394 STI and Polymorphic Associations pro 81 comments 14 minutes Nov 25, 2012
392 A Tour of State Machines pro 93 comments 12 minutes Nov 17, 2012
103 Site-Wide Announcements (revised) 95 comments 11 minutes Nov 12, 2012
389 Multitenancy with PostgreSQL pro 112 comments 11 minutes Oct 27, 2012
388 Multitenancy with Scopes pro 120 comments 12 minutes Oct 20, 2012
382 Tagging 125 comments 11 minutes Sep 22, 2012
59 Optimistic Locking (revised) 135 comments 8 minutes Aug 04, 2012
16 Virtual Attributes (revised) 71 comments 11 minutes Jul 20, 2012
364 Active Record Reputation System 105 comments 10 minutes Jul 09, 2012
355 Hacking with Arel pro 70 comments 15 minutes May 30, 2012
354 Squeel 69 comments 9 minutes May 30, 2012
154 Polymorphic Association (revised) 99 comments 11 minutes May 19, 2012
196 Nested Model Form (revised) 228 comments 11 minutes Apr 19, 2012
343 Full-Text Search in PostgreSQL pro 131 comments 16 minutes Apr 17, 2012
342 Migrating to PostgreSQL 137 comments 8 minutes Apr 17, 2012
338 Globalize3 67 comments 5 minutes Apr 04, 2012
26 Hackers Love Mass Assignment (revised) 66 comments 6 minutes Mar 08, 2012
17 HABTM Checkboxes (revised) 94 comments 6 minutes Dec 22, 2011
120 Thinking Sphinx (revised) 44 comments 10 minutes Dec 09, 2011
251 MetaWhere & MetaSearch 65 comments 8 minutes Jan 31, 2011
239 ActiveRecord::Relation Walkthrough 42 comments 11 minutes Nov 07, 2010
217 Multistep Forms 92 comments 15 minutes Jun 07, 2010
215 Advanced Queries in Rails 3 53 comments 9 minutes May 24, 2010
212 Refactoring & Dynamic Delegator 50 comments 7 minutes May 03, 2010
211 Validations in Rails 3 59 comments 9 minutes Apr 26, 2010
202 Active Record Queries in Rails 3 71 comments 10 minutes Feb 22, 2010
196 Nested Model Form Part 1 184 comments 11 minutes Jan 11, 2010
193 Tableless Model 55 comments 8 minutes Dec 21, 2009
189 Embedded Association 83 comments 14 minutes Nov 23, 2009
181 Include vs Joins 73 comments 11 minutes Sep 28, 2009
179 Seed Data 64 comments 7 minutes Sep 14, 2009
178 7 Security Tips 64 comments 14 minutes Sep 07, 2009
177 Model Versioning 56 comments 9 minutes Aug 31, 2009
176 Searchlogic 96 comments 13 minutes Aug 24, 2009
168 Feed Parsing 55 comments 10 minutes Jun 29, 2009