forked from OpenNeo/impress
Matchu
fcf3292448
I'm not sure it's literally true that they were all built against Rails 3.2, but that's what it was at before we upgraded, and like. that's probably fine
20 lines
833 B
Ruby
20 lines
833 B
Ruby
class IndexClosetHangerQuery2 < ActiveRecord::Migration[3.2]
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def self.up
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# SELECT `objects`.* FROM `objects`
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# INNER JOIN `item_outfit_relationships` ON
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# `objects`.id = `item_outfit_relationships`.item_id
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# WHERE ((`item_outfit_relationships`.outfit_id = 138510) AND
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# ((`item_outfit_relationships`.`is_worn` = 1)));
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# Small optimization, but an optimization nonetheless!
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# Note that MySQL indexes can be reused for left-subsets, by which I mean
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# this index can also act as just an index for outfit_id. Neat, eh?
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remove_index :item_outfit_relationships, :outfit_id
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add_index :item_outfit_relationships, [:outfit_id, :is_worn]
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end
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def self.down
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remove_index :item_outfit_relationships, [:outfit_id, :is_worn]
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add_index :item_outfit_relationships, :outfit_id
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end
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end
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