Codeigniter4 How can i use different field for save() method as primary key

Dear Friends,

I have a application where HR department can upload a xlsx file to add/update employees records. In the employees table i have id as primary key which i used for other operations like edit, delete etc...
For this xlsx file upload functionality i need to use save() method after parsing the data from the file for that i cannot let HR to specify a primary key, instead of that there is one field called "emp_code", how i can use that field as primary key only for the save() method after processing the uploaded xlsx file ?

Here is my controller where i process the xlsx file :

Code:

$data_to_save = [

                                'first_name' => $first_name,
                                'last_name' => $last_name,
                                'date_of_joining' => $date_of_joining,
                                'emp_code' => $emp_code,
                                'email' => $email,
                                'dob' => $dob,
                                'reporting_to' => $reporting_to,
                                

                            ];

                            if($this->model->save($data_to_save)) {

                                $response = ["status" => "success", "message" => "", "type" => "insertion"];
                            }
                            else {

                                $response = ["status" => "error", "message" => "error in data" , "type" => "insertion"];

                            }

In model i changed primaryKey = "emp_code" but that works for my save but that stops the other functions like edit and delete.

can you please read here carefully please https://codeigniter.com/user_guide/tutor...ews-method
you will see that instead of the primary key yet, we can update or delete the data as you wish

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