Question

我不想自动加载Settings_model （在autoload.php中），因为该模型会打开一个新的数据库连接。它没有什么问题，但它为我创建的每个新对象（我不想要）打开一个新的数据库连接。

Settings_model的代码段：

class Settings_model extends CI_Model {

    public static $db_config = array();

    public function __construct() {
        parent::__construct();

        $this->_load_settings();
    }



   /**
     *
     * _load_settings: load the settings from database
     *
     *
     */

    protected function _load_settings() {
    $this->load->library('cache');
    $data = $this->cache->get('settings');
    if (empty($data)) {
        $this->db->select('login_enabled, register_enabled, install_enabled, members_per_page, admin_email, home_page, active_theme,
        login_attempts, recaptcha_theme, email_protocol, sendmail_path, smtp_host, smtp_port, smtp_user, smtp_pass, site_title, cookie_expires,
        password_link_expires, activation_link_expires, disable_all, site_disabled_text, remember_me_enabled, recaptcha_enabled');
        $this->db->from('settings');
        $this->db->limit(1);
        $query = $this->db->get();

        if($query->num_rows() == 1) {
            $row = $query->row();
            self::$db_config['login_enabled'] = $row->login_enabled;
            self::$db_config['registration_enabled'] = $row->register_enabled;
            self::$db_config['install_enabled'] = $row->install_enabled;

        etc...

MY_Controller看起来像这样：

class MY_Controller extends CI_Controller
{
    public function __construct()
    {
        parent::__construct();
        if (Settings_model::$db_config['disable_all'] == 1 && $this->session->userdata('role_id') != 1 && $this->uri->segment(2) != "login") {
            $this->session->sess_destroy();
            redirect('site_offline');
        }

所以基本上当我创建新对象时：

$x = new Object()

**MY_Controller** is called.

Settings_model is called and db-connection are made 
(because $this->load_settings() are called in the constructor).

如何正确使用Settings_model而无需在autoload.php中自动加载？

是的我可以在每个控制器中使用类似$this->load->model('system/settings_model')的内容，但在某些配置文件中，它会获取如下值：

$config['recaptcha'] = array(
  'public'=>'',
  'private'=>'',
  'RECAPTCHA_API_SERVER' =>'http://www.google.com/recaptcha/api',
  'RECAPTCHA_API_SECURE_SERVER'=>'https://www.google.com/recaptcha/api',
  'RECAPTCHA_VERIFY_SERVER' =>'www.google.com',
  'RECAPTCHA_SIGNUP_URL' => 'https://www.google.com/recaptcha/admin/create',
  'theme' => Settings_model::$db_config['recaptcha_theme']
);

很难解释这一点，但可以随意质疑是否有不明确的事情。

如何在配置文件和控制器中使用模型而不在自动加载中？

0 个答案: