編碼函數的codeigniter中的is_unique

Question

我有要求，我可以在新的添加功能中進行唯一值的驗證

$this->form_validation->set_rules('email','Email','required|valid_email||is_unique[users.Email]');

它的工作，但在編輯功能，它不工作..我有寫回調函數來檢查唯一的電子郵件。 這是我在編輯功能中編寫的代碼

$this->form_validation->set_rules('email','Email','required|valid_email|callback_check_email');

function check_username($email)
    { 
        $return_value = $this->user_model->check_email($email);
        if ($return_value)
        {
            $this->form_validation->set_message('email_check', 'Sorry, This username is already used by another user please select another one');
            return FALSE;
        }
        else
        {
        return TRUE;
        }
    }

和user_model

function check_mail($email)
    { 
        $sql = "SELECT users.Email
                FROM users
                WHERE 
                $email = users.Email
                ";

        $result = $this->db->query($sql)->result_array();
        return $result;

    }

我無法驗證唯一的電子郵件

Answer 1

在控制器中嘗試此代碼（編輯視圖）

    $original_value = $this->db->query("SELECT EMAIL FROM users WHERE id = ".$id)->row()->EMAIL ;
    if($this->input->post('username') != $original_value) {
       $is_unique =  '|is_unique[users.EMAIL]';
    } else {
       $is_unique =  '';
    }
$this->form_validation->set_rules('username', 'User Name', 'required|min_length[3]|max_length[30]|trim|xss_clean'.$is_unique);

Answer 2

簡單的解決方案 ，靈感來自CodeIgniter的is_unique代碼。

警告：僅當數據庫中行的標識符是典型的“id”時才有效。 雖然，這段代碼很容易適合。

將is_unique更改為edit_unique，並連接您正在編輯的行的id，如下所示：

$this->form_validation->set_rules('email','Email','required|valid_email|edit_unique[users.Email.'.$id.']');

然后轉到application / libraries文件夾並使用以下代碼創建MY_Form_validation.php：

<?php

class MY_Form_validation extends CI_Form_validation{

    public function edit_unique($str, $field)
    {
        sscanf($field, '%[^.].%[^.].%[^.]', $table, $field, $id);
        return isset($this->CI->db)
            ? ($this->CI->db->limit(1)->get_where($table, array($field => $str, 'id !=' => $id))->num_rows() === 0)
            : FALSE;
    }

}

然后編輯此文件：application / system / language / english / form_validation_lang.php

並在文件末尾添加此代碼：

$lang['form_validation_edit_unique']= 'The {field} field must contain a unique value.';

：d

Answer 3

<?php

/* Create MY_Form_validation.php  in ci_root/application/libraries */

class MY_Form_validation extends CI_Form_validation {

public function is_unique($str, $field) {

    if (substr_count($field, '.') == 3) {
        list($table, $field, $id_field, $id_val) = explode('.', $field);
        $query = $this->CI->db->limit(1)->where($field, $str)->where($id_field . ' != ', $id_val)->get($table);
    } else {
        list($table, $field) = explode('.', $field);
        $query = $this->CI->db->limit(1)->get_where($table, array($field => $str));
    }

    return $query->num_rows() === 0;
}

}
?>



<?php

/* implementation */

function update() {

$user_id = $this->input->post("user_id");
$rules = array(array(
        'field' => 'email',
        'label' => 'Email',
        'rules' => 'required|valid_email|is_unique[users.Email.id.' . $user_id . ']'));

$this->form_validation->set_rules($rules);
}

Answer 4

假設系統提供您在應用程序中更新您的用戶名，然后： -

文件>> config / form_validation.php

$config = array(
    "add_user" => array(
        array('field' => 'name','label' => 'name','rules' =>'required','errors' => array(
            'required' => '%s is required.' 
        )),
        array('field' => 'username','label' => 'username','rules' =>'required|is_unique[tbl_users.username]','errors' => array(
            'required' => '%s is required.',
            'is_unique' => 'Sorry, that %s value is already being used.', 
        )),
        array('field' => 'password','label' => 'password','rules' =>'required','errors' => array(
            'required' => '%s is required.' 
        )),
    ),
    "update_user" => array(
        array('field' => 'name','label' => 'name','rules' =>'required','errors' => array(
            'required' => '%s is required.' 
        )),
        array('field' => 'username','label' => 'username','rules' =>'required|callback_unique_username','errors' => array(
            'required' => '%s is required.' 
            'unique_username' => 'Sorry, that %s value is already being used.' 
        )),
        array('field' => 'password','label' => 'password','rules' =>'required','errors' => array(
            'required' => '%s is required.' 
        )),
    )
)

文件>> controller / Users.php

    public function unique_username($username){
        /* 
        * At the time of update you will be needing the user_id 
        * of particular user whose profile you want to update
        * we have placed user_id as hidden field in user update view 
        * form like 
        * <input type="hidden" value="{user_id here}" name="user_id">  
        */ 
        $this->db->where_not_in('user_id',$this->input->post('user_id'));
        $this->db->where('username',$username);
        if($this->db->count_all_results('tbl_users') > 0){
            return false;
        }else{
            return true;
        }
    }

Answer 5

 $original_value = $this->db->query("select role_name from user_roles where iduser_roles = ".$iduser_roles)->row()->role_name ;
        if($this->input->post('role_name') != $original_value) {
            $is_unique =  '|is_unique[user_roles.role_name]';
        } else {
            $is_unique =  '';
        }

        $this->form_validation->set_rules('role_name', 'Role Name', 'trim|required|xss_clean'.$is_unique);

Answer 6

改進僅支持“id”作為列名的“DrPollit0”解決方案。 此解決方案允許您清除列名稱，如columnID

在application \\ libraries \\ MY_Form_validation.php中創建自定義驗證類

class MY_Form_validation extends CI_Form_validation
{
    public function __construct($rules = array())
    {
        $this->CI =& get_instance();
        parent::__construct($rules);
    }

    public function edit_unique($str, $field)
    {
        sscanf($field, '%[^.].%[^.].%[^.].%[^.]', $table, $field, $columnIdName, $id);
        return isset($this->CI->db)
            ? ($this->CI->db->limit(1)->get_where($table, array($field => $str, $columnIdName .'!=' => $id))->num_rows() === 0)
            : FALSE;
    }
}

將其添加到system \\ language \\ english \\ form_validation_lang.php

$lang['form_validation_edit_unique']= 'The supplied value is already taken.';

在控制器中使用

$id = $this->uri->segment(3);
'rules' => 'trim|required|max_length[50]|edit_unique[mytable.mycolumn.columnID.'.$id.']'

Answer 7

像這樣更靈活：

public function edit_unique($str, $field)
    {
        sscanf($field, '%[^.].%[^.].%[^.]', $table, $field, $value);
        return isset($this->CI->db)
            ? ($this->CI->db->limit(1)->get_where($table, array(''.$field.' !=' => $value))->num_rows() === 0)
            : FALSE;
    }

Answer 8

刪除雙|| 並放置單個| 就在is_unique之前，你的函數名check_username應該是你在callback_之后給出的名字，這意味着你的情況應該是check_email 。