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ARel -> Arel

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Prathamesh Sonpatki 2013-04-14 12:33:28 +05:30
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guides/source/3_2_release_notes.md
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@ -101,7 +101,7 @@ Rails 3.2 comes with a development mode that's noticeably faster. Inspired by [A
### Automatic Query Explains
Rails 3.2 comes with a nice feature that explains queries generated by ARel by defining an `explain` method in `ActiveRecord::Relation`. For example, you can run something like `puts Person.active.limit(5).explain` and the query ARel produces is explained. This allows to check for the proper indexes and further optimizations.
Rails 3.2 comes with a nice feature that explains queries generated by Arel by defining an `explain` method in `ActiveRecord::Relation`. For example, you can run something like `puts Person.active.limit(5).explain` and the query Arel produces is explained. This allows to check for the proper indexes and further optimizations.
Queries that take more than half a second to run are *automatically* explained in the development mode. This threshold, of course, can be changed.