workorder/application/models/Branch_model.php

<?php

class Branch_model extends CI_Model
{
    private $collection_name = 'branch';

    public function __construct()
    {
        parent::__construct();
    }

    private $model = array(
        'branch_type' => "",
        "branch_id" => "",
        "branch_name" => "",
        "device" => array(
            "device_id" => "",
            "device_type" => ""
        )
    );

    public function get_model()
    {
        return $this->model;
    }

    public function select_branch()
    {
        $order = array("create_time" => "ASC");
        return $this->mongo_db->order_by($order)->get($this->collection_name);
    }

    public function get_branch_by_id($branch_id)
    {
        return $this->mongo_db->where(array("branch_id" => $branch_id))->find_one($this->collection_name);
    }

    public function save_branch($branch)
    {
        if ($this->get_branch_by_id($branch['branch_id'])) {
            return $this->update_branch($branch);
        } else {
            return $this->insert_branch($branch);
        }
    }

    public function insert_branch($branch)
    {
        return $this->mongo_db->insert($this->collection_name, $branch);
    }

    public function update_branch($branch)
    {
        $data['filter'] = array("branch_id" => $branch['branch_id']);
        $data['update'] = $branch;
        return $this->mongo_db->update($this->collection_name, $data);
    }
}