22 lines
460 B
Ruby
22 lines
460 B
Ruby
class CounterCacheOnPostReshares < ActiveRecord::Migration
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class Post < ActiveRecord::Base; end
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def self.up
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add_column :posts, :reshares_count, :integer, :default => 0
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execute %{
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UPDATE posts
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SET reshares_count = (
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SELECT COUNT(*)
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FROM posts p2
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WHERE
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p2.type = 'Reshare'
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AND p2.root_guid = posts.guid
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)
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}
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end
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def self.down
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remove_column :posts, :reshares_count
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end
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end
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