class DefaultExistingMutesToHidingNotifications < ActiveRecord::Migration[5.1]
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def up
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change_column_default :mutes, :hide_notifications, from: false, to: true
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# Unfortunately if this is applied sometime after the one to add the table we lose some data, so this is irreversible.
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Mute.update_all(hide_notifications: true)
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end
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end
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