The definitive guide to Arel, the SQL manager for Ruby - Jiri Pospisil
Arel is the kind of library that many of us Rails developers use on a daily basis and might not even know about it. So what's this library whose name only pops up when everything else fails all about? It's all about providing frameworks with a way of building and representing SQL queries. It's not the kind of library you would typically want to use directly (although you could as shown in a minute
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