Codeigniter 不允许我更新条目,因为某些字段必须是唯一的

Codeigniter doesn't let me update entry, because some fields must be unique

所以我想做的是:

  1. 从数据库中提取用户数据,包括电子邮件地址、用户名等

  2. 编辑它

  3. 保存

但我想保持用户名和电子邮件的唯一性。 为此,我设置了这样的验证规则:

$this->form_validation->set_rules('firstname', 'First Name', 'required|min_length[2]|max_length[15]');
$this->form_validation->set_rules('lastname', 'Last Name', 'required|min_length[2]|max_length[15]');
$this->form_validation->set_rules('email', 'Email', 'required|valid_email|is_unique[users.email]');
$this->form_validation->set_rules('username', 'Username', 'required|min_length[4]|max_length[12]|is_unique[users.username]');
$this->form_validation->set_rules('password1', 'Password', 'required|matches[password2]');
$this->form_validation->set_rules('password2', 'Password Confirmation', 'required');
$this->form_validation->set_rules('group', 'User Group', 'required');

如您所见,我有 is_unique[users.username]is_unique[users.email] 规则。但它不允许我使用此规则更新我的条目。

所以问题是,我怎样才能更新数据库条目,并使这 2 个字段保持唯一(用户名和电子邮件)?

使用回调验证函数

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

function check_user_email($email) {        
    if($this->input->post('id'))
        $id = $this->input->post('id');
    else
        $id = '';
    $result = $this->user_model->check_unique_user_email($id, $email);
    if($result == 0)
        $response = true;
    else {
        $this->form_validation->set_message('check_user_email', 'Email must be unique');
        $response = false;
    }
    return $response;
}

在模型中

    function check_unique_user_email($id = '', $email) {
        $this->db->where('email', $email);
        if($id) {
            $this->db->where_not_in('id', $id);
        }
        return $this->db->get('user')->num_rows();
    }

使用相同的用户名....

在 Codeigniter 4 中

// is_unique[table.field,ignore_field,ignore_value]

$validation->setRules([
 'name' => "is_unique[supplier.name,uuid, $uuid]",  // is not ok
 'name' => "is_unique[supplier.name,uuid,$uuid ]",  // is not ok
 'name' => "is_unique[supplier.name,uuid,$uuid]",   // is ok
 'name' => "is_unique[supplier.name,uuid,{uuid}]",  // is ok - see "Validation Placeholders"

]);

例如

$validation->setRules(['email' => 'required|valid_email|is_unique[users.email,id,4]']);
// 'id' = ignore table field name (users table 'id' field) 
// '4' = ignore field value(currnet user id)

codeigniter 4 validation

对于 Codeigniter 3

  1. 添加以下助手class (edit_unique_helper.php)

    函数edit_unique($value, $params) { $CI =& get_instance(); $CI->加载->数据库();

    $CI->form_validation->set_message('edit_unique', "Sorry, that %s is already being used.");
    
    list($table, $field, $current_id) = explode(".", $params);
    
    $query = $CI->db->select()->from($table)->where($field, $value)->limit(1)->get();
    
    if ($query->row() && $query->row()->id != $current_id)
    {
        return FALSE;
    } else {
        return TRUE;
    }
    

    }

  2. 加入自动加载()

  3. 使用 edit_unique 传递额外参数,即您正在编辑的行的 ID 例如。 $this->form_validation->set_rules('user_name', 'User Name', 'required|trim|xss_clean|edit_unique[users.user_name.'.$id.']');

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