CakePHPで `created` の代わりに `created_at` を使うようにするために AppModel を強引にいじってみた。

AppModel.php

<?php
/**
 * Application model for Cake.
 *
 * This file is application-wide model file. You can put all
 * application-wide model-related methods here.
 *
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       app.Model
 * @since         CakePHP(tm) v 0.2.9
 */

App::uses('Model', 'Model');

/**
 * Application model for Cake.
 *
 * Add your application-wide methods in the class below, your models
 * will inherit them.
 *
 * @package       app.Model
 */
class AppModel extends Model {
	
	/**
	 * 置き換えたいカラム名の連想配列
	 *
	 * @var array
	 */
	protected $fieldAliases = [
		'created'  => 'created_at',
		'updated'  => 'updated_at',
		'modified' => 'modified_at',
	];

	public function getColumnType($column) {
		if (isset($this->fieldAliases[$column])) {
			$column = $this->fieldAliases[$column];
		}
		return parent::getColumnType($column);
	}

	public function hasField($name, $checkVirtual = false) {
		if (is_array($name)) {
			foreach ($name as $n) {
				if ($this->hasField($n, $checkVirtual)) {
					return $n;
				}
			}
			return false;
		}

		if (isset($this->fieldAliases[$name])) {
			$name = $this->fieldAliases[$name];
		}
		return parent::hasField($name, $checkVirtual);
	}

	public function set($one, $two = null) {
		$data = parent::set($one, $two);

		if (empty($data)) return $data;

		foreach ($data as $modelName => $fieldSet) {
			if (!is_array($fieldSet)) {
				continue;
			}

			foreach ($this->fieldAliases as $fieldBefore => $fieldAfter) {
				if (isset($this->data[$modelName][$fieldBefore])) {
					$this->data[$modelName][$fieldAfter] = $this->data[$modelName][$fieldBefore];
					unset($this->data[$modelName][$fieldBefore]);
				}
				if (isset($data[$modelName][$fieldBefore])) {
					$data[$modelName][$fieldAfter] = $data[$modelName][$fieldBefore];
					unset($data[$modelName][$fieldBefore]);
				}
			}
		}

		return $data;
	}
}