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| # | Name | Comments | Duration | Released |
|---|---|---|---|---|
| 342 | Migrating to PostgreSQL | 137 comments | 8 minutes | Apr 17, 2012 |
| 406 | Public Activity | 155 comments | 10 minutes | Feb 13, 2013 |
| 382 | Tagging | 125 comments | 11 minutes | Sep 22, 2012 |
| 364 | Active Record Reputation System | 105 comments | 10 minutes | Jul 09, 2012 |
| 338 | Globalize3 | 67 comments | 5 minutes | Apr 04, 2012 |
| 179 | Seed Data | 64 comments | 7 minutes | Sep 14, 2009 |
| 196 | Nested Model Form Part 1 | 184 comments | 11 minutes | Jan 11, 2010 |
| 189 | Embedded Association | 83 comments | 14 minutes | Nov 23, 2009 |
| 211 | Validations in Rails 3 | 59 comments | 9 minutes | Apr 26, 2010 |
| 193 | Tableless Model | 55 comments | 8 minutes | Dec 21, 2009 |
| 177 | Model Versioning | 56 comments | 9 minutes | Aug 31, 2009 |
| 154 | Polymorphic Association | 125 comments | 8 minutes | Mar 23, 2009 |
| 163 | Self-Referential Association | 88 comments | 14 minutes | May 25, 2009 |
| 168 | Feed Parsing | 55 comments | 10 minutes | Jun 29, 2009 |
| 147 | Sortable Lists | 62 comments | 8 minutes | Feb 02, 2009 |
| 124 | Beta Invitations | 80 comments | 22 minutes | Aug 25, 2008 |
| 47 | Two Many-to-Many | 78 comments | 9 minutes | Jun 20, 2007 |
| 23 | Counter Cache Column | 69 comments | 7 minutes | Apr 25, 2007 |