Codeigniter 不允许我更新条目，因为某些字段必须是唯一的

Question

So what I'm trying to do:

1. Pull User data from database, including email address, username etc.

2. Edit it

3. Save it

But I want to keep username and email unique. And for this I'm setting validation rules like this:

$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');

And as you can see I have is_unique[users.username] and is_unique[users.email] rules. But it doesn't let me update my entry using this rules.

So the question is, how can I update database entry, and keep those 2 fields unique(username and email)?

Answer 1

use the call back validation function

$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;
}

in model

    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();
    }

use same for the user name....

Answer 2

In Codeigniter 4

// 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"

]);

Eg.

$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

For Codeigniter 3

1. Add following helper class (edit_unique_helper.php)

   function edit_unique($value, $params) { $CI =& get_instance(); $CI->load->database();

    $CI->form_validation->set_message('edit_unique', "Sorry, that %s is already being used."); list($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. Add to autoload ()

3. Use edit_unique where you pass an extra parameter which is the id of the row you're editing eg. $this->form_validation->set_rules('user_name', 'User Name', 'required|trim|xss_clean|edit_unique[users.user_name.'.$id.']');

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