Question

我有一个表单，我可以填写我的数据库详细信息，然后将其放在database.php文件中。

问题

当我点击提交按钮时，它应加载我的迁移但无法加载迁移，因为说的数据库名称不正确。

原因是因为它与数据库同时加载并且还没有选择名称。

一旦建立了数据库连接或数据库名称，是否可以运行loadMigrations函数。

$this->form_validation->set_rules('hostname', 'Hostname', 'required');
$this->form_validation->set_rules('username', 'Database Username', 'trim|required|xss_clean');
$this->form_validation->set_rules('password', 'Password', 'trim|xss_clean');
$this->form_validation->set_rules('database', 'Database', 'required');
$this->form_validation->set_rules('driver', 'Database Driver');
$this->form_validation->set_rules('prefix', 'Database Prefix'); 

$this->load->library('form_validation');

if ($this->form_validation->run($this) == false) {

$this->load->view('template/step_3');

} else {    

$data = array();
$data['hostname']   = $this->input->post('hostname');
$data['username']   = $this->input->post('username');
$data['password']   = $this->input->post('password');
$data['database']   = $this->input->post('database');
$data['driver'] = $this->input->post('driver');
$data['prefix']  = $this->input->post('prefix');

$data  = $this->load->view('template/configuration/database', $data, true);
write_file(dirname(FCPATH) . '/admin/application/config/database.php', $data, 'r+');
write_file(dirname(FCPATH) . '/catalog/config/database.php', $data, 'r+');
write_file(FCPATH . '/application/config/database.php', $data, 'r+');

/* 
|
|   This migration does not work because will not pick up database name
|   You all ways have to refresh page. Need away that can load migrations
|   Once there is a database name in the database.php file.
|
*/

$this->load->dbutil();
if($this->dbutil->database_exists($this->input->post('database'))) {
$this->load->library('migration');
$this->migration->version(1);
redirect('step_4'); // connected, go on
} else {
redirect('step_3'); // failed, go back
}   

}

Answer 1

您可以检查数据库连接，如下所示：

$db = $this->load->database('default', true);

if($connected = $db->initialize()) 
{
     redirect('step_4'); // connected, go on
} 
else
{
     redirect('step_3'); // failed, go back
}

另一种方式

// Returns boolean or mysql/mysqli object
function test_db_connection()
{
    $hostname = $this->input->post('hostname');
    $database = $this->input->post('database');
    $username = $this->input->post('username');
    $password = $this->input->post('password');
    $driver   = $this->input->post('driver');

    if($driver == 'mysqli')
    {
        return function_exists('mysqli_connect') && @mysqli_connect($hostname, $username, $password, $database);
    }

    $link = @mysql_connect("$hostname", $username, $password);
    return $link && mysql_select_db("$database", $link)
}

我正在使用的这个功能是正常的。如果不起作用，请再次检查您的代码。

如果db connection true加载迁移codeigniter

1 个答案: