// Model classification (cost/tag/category) is discontinued: scrub stored custom
// model JSON and refuse re-adding those keys at the application layer.
exports.up = pgm => {
  pgm.sql(`
    UPDATE app_settings
    SET value = (
      SELECT jsonb_agg(jsonb_build_object('id', item->>'id', 'name', item->>'name'))::text
      FROM jsonb_array_elements(value::jsonb) AS item
      WHERE item ? 'id' AND item ? 'name'
    )
    WHERE key = 'models.custom'
      AND value IS NOT NULL
      AND value <> ''
      AND value::jsonb IS NOT NULL
      AND value::jsonb <> '[]'::jsonb;
  `);
};

exports.down = pgm => {
  // No historical classification data remains to restore; nothing to do.
};