Created
February 4, 2013 22:40
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| arels = [Vote, Comment, Love].collect{|u| | |
| t = u.arel_table | |
| u.select([ | |
| t[:created_at].maximum.as("ts"), | |
| t[:photo_id].as("what_id"), | |
| "'Photo' AS what_type" | |
| ]).group(t[:photo_id]).arel | |
| } | |
| union = Arel::Nodes::Union.new(arels[0], arels[1]) | |
| union.to_sql |
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