11 lines
477 B
Ruby
11 lines
477 B
Ruby
class DeleteDisconnectedNotifications < ActiveRecord::Migration
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def self.up
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result = execute("SELECT notifications.id FROM notifications
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LEFT OUTER JOIN posts ON posts.id = notifications.target_id
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WHERE posts.id IS NULL AND notifications.target_id IS NOT NULL AND notifications.target_type = 'Post'").to_a.flatten!
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execute("DELETE FROM notifications WHERE notifications.id IN (#{result.join(',')})") if result
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end
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def self.down
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end
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end
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