Codeigniter Check For Duplicate on Edit Function

Codeigniter Check For Duplicate on Edit Function

By : user3042537
Date : November 28 2020, 12:01 PM
I wish this helpful for you Will you please share the code of function UsernameDuplicatechecking($userName) or you can try the below solution and let me know if it helps. Add below function to your userdb model
code :
function checkDuplicateUsername($userName)
    $query = $this->db->get('USERDB');
    if ($query->num_rows() > 0){
        return true;
        return false;
$checkvalidation = $this->userdb->checkDuplicateUsername($userName);
if($checkvalidation == true){
  $this->session->set_flashdata('errormessage', 'Your message here');

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Check duplicate data in CodeIgniter try to make a callback function

Check duplicate data in CodeIgniter try to make a callback function

By : M.Dogankaya
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Your problem is in the model function. Look at the following model function.
code :
public function checkDuplicateEmail($post_email) {

    $this->db->where('email_id', $email_id);

    $query = $this->db->get('my_registration_table');

    $count_row = $query->num_rows();

    if ($count_row > 0) {
      //if count row return any row; that means you have already this email address in the database. so you must set false in this sense.
        return FALSE; // here I change TRUE to false.
     } else {
      // doesn't return any row means database doesn't have this email
        return TRUE; // And here false to TRUE
How to re-populate check box in edit form using Codeigniter

How to re-populate check box in edit form using Codeigniter

By : lanthanum
Date : March 29 2020, 07:55 AM
hope this fix your issue So far I know how to repopulate the form input and checkbox , A simple one just check for post data too if validation fails
code :
    echo "checked"; set_checkbox('is_default', '1');
    }elseif ($customer_group[0]['is_default'] == "1"){
    echo "checked"; set_checkbox('is_default', '1');
Check duplicate data in CodeIgniter result

Check duplicate data in CodeIgniter result

By : Alex
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Managed to get what I think you are trying to achieve by using a group by i.e.
code :
SELECT * FROM posts GROUP BY forumId;
    FROM posts
    ORDER BY date DESC
    LIMIT 18446744073709551615
) AS sub
GROUP BY sub.forumId
Codeigniter Edit (Check Duplicate + Allow to Update if duplicate not found)

Codeigniter Edit (Check Duplicate + Allow to Update if duplicate not found)

By : neilyo_chc
Date : December 20 2020, 04:45 AM
Hope this helps For this problem you have to send user ID in which function you can check duplicate's of user name.
code :
$this->db->where("userId <> $id");
problem with duplicate values check in the edit page

problem with duplicate values check in the edit page

By : Sankar Ganesh Arumug
Date : January 02 2021, 06:48 AM
To fix the issue you can do The problem is that your query becomes Select Email from Persona where Email='', which returns zero records, indicating that the empty email address is available, allowing your code to continue.
You need to validate your user input. Use the RequiredFieldValidator, for example, see How to validate this data entry form in ASP.NET Web Forms? and Microsoft Docs: RequiredFieldValidator. This makes sure that your code isn't executed when the email textbox is empty.
code :
SELECT Email FROM Persona WHERE Email = @Email AND Id != @Id
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