おれおれDataMapper

gistfile1.php

<?php

class Base_Model {
	private static $db_master = null;

    protected $attributes = array();
    protected $is_new     = true;
    protected $is_dirty   = false;

    private $fields = array();
    private $table_name = '';
    private $primary_keys = array();
	
	static function db_master() {
		if (self::$db_master == null) {
			self::$db_master = gf_DbConnect();
		}
		return self::$db_master;
	}

    function __set($key, $value) {
        if (in_array($key, $this->fields) && $this->attributes[$key] !== $value) {
            $this->attributes[$key] = $value;
            $is_dirty = true;
        }
    }

    function __get($key) {
        return $this->attributes[$key];
    }

    function isNew() {
        return $this->is_new;
    }

    function isDirty() {
        return $this->is_dirty;
    }

    function save() {
        if (!$this->valid()) {
            return false;
        }

        if ($this->isNew()) {
            self::db_master()->autoExecute($this->table_name,
                                           $this->attributes,
                                           DB_AUTOQUERY_INSERT);
            
        } elseif ($this->isDirty()) {
            $where = array();
            foreach ($this->primary_keys as $field) {
                $where[] = $field . ' = ' . DB::quoteSmart($this->attributes[$field]);
            }
            $where = implode(' AND ', $where);
            self::db_master()->autoExecute($this->table_name,
                                           $this->attributes,
                                           DB_AUTOQUERY_UPDATE,
                                           $where);
        } else {
            return true;
        }
    }

    protected function valid() {
        return false;
    }
}

class Product {
    private $table_name = 't_pro_product';

    private $primary_keys = array('product_id', 'account_id');

    private $fields = array('product_id',
                            'account_id',
                            'name',
                            'price',
                            'image_url')

    function valid() {
        return !is_null($this->product_id) && !is_null($this->account_id);
    }
}