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class RemoveNotificationSettingNotNullConstraints < ActiveRecord::Migration[4.2]
def up
change_column :notification_settings, :source_type, :string, null: true
change_column :notification_settings, :source_id, :integer, null: true
end
def down
change_column :notification_settings, :source_type, :string, null: false
change_column :notification_settings, :source_id, :integer, null: false
end
end
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