Codeigniter Grocery Crud extend set_relation() function?

Question

Is there anyone knows how to extend the set_relation() ?

Here is the idea, base on the example of Grocery Crud employee and offices table

$crud->set_relation('officeCode','offices','city');

the code output will show all city in dropdown, but I want to extent the set_relation() to filter all city by state to show in dropdown?

for example I want to show all city of Arizona state in dropdown, Does anyone done this before using grocery crud?

reference example:

Grocery Crud

Answer 1

I think you need this:

function employees_management()
{
    $crud = new grocery_CRUD();

    $crud->set_theme('datatables');
    $crud->set_table('employees');
    // add this line
    $crud->callback_edit_field('officeCode',array($this,'_call_back_offices'));
    $crud->callback_add_field('officeCode',array($this,'_call_back_offices'));

    $crud->display_as('officeCode','Office City');
    $crud->set_subject('Employee');

    $crud->set_relation('officeCode','offices','city');

    $output = $crud->render();

    $this->_example_output($output);
}

function _call_back_offices()
{
    $this->load->model('user_model'); // your model
    $data = $this->user_model->getYou('offices','officeCode, city', "state = '".$this->session->userdata('state')."'"); // iam using session here
    $hasil ='<select name="officeCode">';
    foreach($data as $x)
    {
        $hasil .='<option value="'.$x->officeCode.'">'.$x->city.'</option>';
    }
    return $hasil.'</select>';
}

example user_model code:

function getYou($tabel,$field = '*', $cond ='')
{
    $this->db->select($field);
    $this->db->from($tabel);
    if(!empty($cond)) $this->db->where($cond);
    return $this->db->get()->result();
}