Question

我在Codeigniter上遇到多个数据库连接问题。在我的database.php我配置了两个数据库。

$active_group = 'cms';
$active_record = FALSE;
     $db['cms']['hostname'] = 'localhost';
    $db['cms']['username'] = 'yoloo_cms';
    $db['cms']['password'] = 'password'; 
    $db['cms']['database'] = 'yoloo_cms'; 
    $db['cms']['dbdriver'] = 'mysql';
    $db['cms']['dbprefix'] = '';
    $db['cms']['pconnect'] = TRUE;
    $db['cms']['db_debug'] = TRUE;
    $db['cms']['cache_on'] = FALSE;
    $db['cms']['cachedir'] = '';
    $db['cms']['char_set'] = 'utf8';
    $db['cms']['dbcollat'] = 'utf8_general_ci';
    $db['cms']['swap_pre'] = '';
    $db['cms']['autoinit'] = TRUE;
    $db['cms']['stricton'] = FALSE;

    $db['hazeleger']['hostname'] = 'localhost';
    $db['hazeleger']['username'] = 'yoloo_websites';
    $db['hazeleger']['password'] = 'password2'; 
    $db['hazeleger']['database'] = 'yoloo_hazeleger'; 
    $db['hazeleger']['dbdriver'] = 'mysql';
    $db['hazeleger']['dbprefix'] = '';
    $db['hazeleger']['pconnect'] = TRUE;
    $db['hazeleger']['db_debug'] = TRUE;
    $db['hazeleger']['cache_on'] = FALSE;
    $db['hazeleger']['cachedir'] = '';
    $db['hazeleger']['char_set'] = 'utf8';
    $db['hazeleger']['dbcollat'] = 'utf8_general_ci';
    $db['hazeleger']['swap_pre'] = '';
    $db['hazeleger']['autoinit'] = TRUE;
    $db['hazeleger']['stricton'] = FALSE;

在我的模型中，当我想连接到另一个数据库而不是通常的数据库时，我会使用它：

function __construct()
{
  parent::__construct();
  $this->load->database('hazeleger',TRUE);
}

但是，codeigniter始终连接到cms。当我删除

$active_group = 'cms';
$active_record = FALSE;

Codeingiter发出错误。我试过这个时

function __construct()
{
  parent::__construct();
  $db2 = $this->load->database('hazeleger',TRUE);
}

function test()
{
      $query  = "SELECT * FROM cms_modules";
      $result = $db2->db->query($query);
      return $db2->result();
}

它出错了。 Variabele db2不存在。我只想在每种型号中选择我想连接的数据库。但是不行，不行。有人知道，我如何使用不同的数据库在模特。

非常感谢!!

Answer 1

您必须将变量$ db2保存为类字段。您可以访问$ this-＆gt; db2 ...

Answer 2

这是因为您最有可能设置在/application/config/autoload.php中自动加载/创建数据库库。

打开autoload.php并查找此行：

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

从数组中删除'database'并保存。现在它应该按照预期在你的控制器中工作。

Answer 3

对于未来访问者的参考，负载将沿着这些方向：

$this->db2 = $this->load->database('hazeleger',true);

Answer 4

您必须更改db2类

    $query  = "SELECT * FROM cms_modules";
    $result = $this->db2->query($query);
    return result();

Codeigniter - 多个数据库连接

4 个答案: