代码点火器-控制器/模型段未返回任何结果

Question

我有一个包含多个条目的数据库。当我加载/计划时，它将正确加载所有条目。但是，当我尝试使用/ schedule / state时，在视图上显示“为foreach（）提供了无效参数”的错误提示。我已经使它以某种方式工作（尽管我显然已经将其破坏了），但是当我将实际状态添加到末尾时，它总是会抛出此错误...即。 / schedule / state /犹他州。

有人可以发现我在做什么错吗？预先谢谢你！

视图（views / schedule / state.php）：

<h2><?php echo $title; ?></h2>

<div class='container'>
    <div class='row'>
<?php

    function printDateRange($start_date, $end_date) {
        $string = "";
        if($start_date !== $end_date) {
            $string = "".date_format(date_create($start_date),"F d, Y")." - ".date_format(date_create($end_date),"F d, Y")."";
        } else {
            $string = date_format(date_create($start_date),"F d, Y");
        }
        return $string;
    }

    $counter = 0;
    foreach ($events as $event) {
        $id = $event['id'];
        $slug = $event['slug'];
        $title = $event['title'];
        $start_date = $event['start_date'];
        $end_date = $event['end_date'];
        $address = $event['address'];
        $city = $event['city'];
        $state = $event['state'];
        $country = $event['country'];
        $postal_code = $event['postal_code'];
        $image = $event['image'];
        $website = $event['website'];
        $facebook = $event['facebook'];
        $instagram = $event['instagram'];
        $twitter = $event['twitter'];
        $first_year_held = $event['first_year_held'];
        $attendance = $event['attendance'];
        $ticket_price = $event['ticket_price'];
        $description = $event['description'];

        echo "
            <div class='col-12 col-md-3'>
                <div class='schedule_box' style='width: 100%; max-width: 600px; background-color: #200080; color: #A0A0FF; padding: 10px; border: dash 1px #000; margin-bottom: 40px;'>
                    <div style='width: 100%; text-align: center; padding: 4px; color: #CCCCFF;'>
                        <h2>".$title."</h2>
                    </div>
                    <div style='width: 100%;'>
                        <img src='".$image."' style='width: 100%;'>
                    </div>
                    <div style='width: 100%; padding-top: 10px'>
                        Date: ".printDateRange($start_date, $end_date)."
                    </div>
                    <div style='width: 100%; padding-top: 10px;'>
                        ".$address."<br/>
                        ".$city.", ".$state."<br/>
                        ".$country."<br/>
                        ".$postal_code."
                    </div>
                    <div style='width: 100%; padding: 4px; text-align: center;'>
                        <a href='".$website."' style='color: #DDD;'>Visit Official Website</a>
                    </div>
                </div>
            </div>
        ";
        $counter++;
        if($counter == 4) {
            echo "</div><div class='row'>";
            $counter = 0;
        }
    }
?>
    </div>
</div>

Controller（Schedule.php）：

<?php
class Schedule extends CI_Controller {

        public function __construct()
        {
                parent::__construct();
                $this->load->model('schedule_model');
                $this->load->helper('url_helper');
        }

        public function index() {
            $data['events'] = $this->schedule_model->get_events();
            $data['title'] = 'Schedule';

            $this->load->view('templates/header', $data);
            $this->load->view('schedule/index', $data);
            $this->load->view('templates/footer');
        }

        public function view($slug = NULL) {

            $data['event'] = $this->schedule_model->get_events();

            if (empty($data['events']))
            {
                    show_404();
            }

            $data['title'] = $data['event']['id'];

            $this->load->view('templates/header', $data);
            $this->load->view('schedule/index', $data);
            $this->load->view('templates/footer');
        }

        public function state($slug = NULL) {
            $data['events'] = $this->schedule_model->get_state_events($slug);
            $data['title'] = 'Schedule';

            $this->load->view('templates/header', $data);
            $this->load->view('schedule/state', $data);
            $this->load->view('templates/footer');
        }
}

?>

模型（Schedule_model.php）：

<?php
class Schedule_model extends CI_Model {

    public function __construct() {
                $this->load->database();
    }

    public function get_events($slug = FALSE) {
        if ($slug === FALSE) {
                $this->db->order_by("start_date", "asc");
                $query = $this->db->get('events');
                return $query->result_array();
        }

        $query = $this->db->get_where('events', array('slug' => $slug));
        return $query->row_array();
    }

    public function get_state_events($slug = FALSE) {
        if ($slug === FALSE) {
                $this->db->order_by("start_date", "asc");
                $query = $this->db->get('events');
                return $query->result_array();
        }

        $query = $this->db->get_where('events', array('slug' => $slug));
        return $query->row_array();
    }
}

?>

路线：

$route['schedule/state/(:any)'] = 'schedule/state/$1';
$route['schedule/state'] = 'schedule/state';
$route['schedule/(:any)'] = 'schedule/view/$1';
$route['schedule'] = 'schedule';
$route['default_controller'] = 'pages/view';
$route['(:any)'] = 'pages/view/$1';
$route['404_override'] = '';
$route['translate_uri_dashes'] = FALSE;