code igniter delete data from different model using single query

Question

[i want to delete data from two table using two models but cant do . am using following code .help me to fix this problem]

public function delete_all_info_employee($id) {
        // ************* Delete into Employee Table 
        $this->employee_model->_table_name = "tbl_employee"; // table name
        $this->employee_model->_primary_key = "employee_id"; // $id
        $this->employee_model->delete($id);
 $this->expense_model->_table_name = "tbl_expense"; // table name
        $this->expense_model->_primary_key = "expense_id"; // $id
        $this->expense_model->delete($id);
    $type = "success";}

Answer 1

1st check you already loaded database in codeigniter\application\config\autoload.php

$autoload['libraries'] = array('database');

your method of model

public function delete_all_info_employee($id) {
    // ************* Delete into Employee Table 
    $this->db->where('employee_id', $id);
    $this->db->delete('tbl_employee');

    $this->db->where('expense_id', $id);
    $this->db->delete('tbl_expense');
    return "success";
}