15 lines
511 B
Ruby
15 lines
511 B
Ruby
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class FixSeenNotificationIds < ActiveRecord::Migration
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def up
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# There was an error where `seen_notification_id` was being updated incorrectly.
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# This tries to fix some of the bad data.
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execute "UPDATE users SET
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seen_notification_id = COALESCE((SELECT MAX(notifications.id)
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FROM notifications
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WHERE user_id = users.id AND created_at <= users.last_seen_at), 0)"
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end
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def down
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end
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end
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