在codeigniter中的database.php中获取会话值

Question

我在codeigniter中创建了一个项目，但是该项目具有多个DBS。 它工作正常，但我希望根据用户表的详细信息来调用一个数据库

在database.php文件中，我希望加载会话用户名以进行查询

我做了以下

$autoload['libraries'] = array('session');

if(!empty($this->session->userdata('username')))
$username_c = $this->session->userdata('username');

我究竟做错了什么？

Answer 1

正如@Tpojka在评论中所说，您不应该在database.php这样做。 您可以动态选择数据库并在查询之前获取实例。 在这里检查。

$db['default']['hostname'] = "localhost";
$db['default']['username'] = "root";
$db['default']['password'] = "";
$db['default']['database'] = "db_one";
$db['default']['dbdriver'] = "mysql";
$db['default']['dbprefix'] = "";
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = FALSE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = "";
$db['default']['char_set'] = "utf8";
$db['default']['dbcollat'] = "utf8_general_ci";
$db['default']['swap_pre'] = "";
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;


$db['second_db']['hostname'] = "localhost";
$db['second_db']['username'] = "root";
$db['second_db']['password'] = "";
$db['second_db']['database'] = "db_two";
$db['second_db']['dbdriver'] = "mysql";
$db['second_db']['dbprefix'] = "";
$db['second_db']['pconnect'] = TRUE;
$db['second_db']['db_debug'] = FALSE;
$db['second_db']['cache_on'] = FALSE;
$db['second_db']['cachedir'] = "";
$db['second_db']['char_set'] = "utf8";
$db['second_db']['dbcollat'] = "utf8_general_ci";
$db['second_db']['swap_pre'] = "";
$db['second_db']['autoinit'] = TRUE;
$db['second_db']['stricton'] = FALSE;

在您的模型中

public function get_profile() {
    if(!empty($this->session->userdata('username'))) {
        $username_c = $this->session->userdata('username');
        $DB2 = $this->load->database('second_db', TRUE); // true to get db instance
        return $DB2->select("*")->from("user")->get()->row(); // query from second DB
    }

    $this->db->select("*")->from("user")->get()->row(); // query from default DB
}

希望对您有用。