嗨，我试图在一个视图上执行foreach循环，但是它没有显示。我检查了数据库，有数据。我检查了模型上的QueryBuilder，并在phpmyadmin上运行了查询，它正在工作。你们知道发生了什么吗？
查看者：

<div class="content-wrapper">
    <section class="content">
        <div class="row">
<?php
foreach ($node as $d) {
?>
            <div class="col-lg-6 col-md-6 col-xs-6">
                <div class="box box-device box-solid" id="device_<?php echo $d['id_device']; ?>">
                    <div class="box-header">
                        <div class="row">
                            <div class="col-sm-3 col-xs-3">
                                <button aria-pressed="false" data-device="<?php echo $d['id_device']; ?>" class="btn btn-onoff btn-sm btn-toggle<?php echo ($d['status_device'] == 1) ? ' active': ''; ?>" data-toggle="button" type="button">
                                    <div class="handle"></div>
                                </button>
                            </div>
                            <div class="col-sm-9 col-xs-9">
                                <h3 class="box-title<?php echo ($d['rule'] == 0) ? ' notactive': ''; ?>"><?php echo $d['nama_device']; ?></h3>
                            </div>
                        </div>
                    </div>
                    <div class="box-body text-center" onclick="window.location.href = '<?php echo site_url('Setting/rule/' . $d['id_device']); ?>'">
                        <img alt="<?php echo $d['nama_device']; ?>" src="<?php echo base_url('uploads/device/' . $d['foto']); ?>" />
                        <h4><?php echo $d['nama_device']; ?></h4>
                        <p><?php echo $d['id_device']; ?></p>
                    </div>
                    <div class="box-footer">
                        <a class="btn btn-default btn-block btn-lg btn-detail" href="<?php echo site_url('Setting/rule/' . $d['id_device']); ?>">View Rule</a>
                    </div>
                </div>
            </div>
<?php
}
?>
        </div>
    </section>
    <?php $this->load->view('components/version'); ?>
</div>

控制器：

public function rulenode() {
        $this->data['sub_title'] = 'Setting - Rule';
        $this->load->model('Mrule');
        $this->data['node'] = $this->Mrule->device();
        $this->load->view('setting/rulenode', $this->data);
    }

产品型号：

public function device() {
        $this->db->select('id_device, nama_device, foto, status_device');
        $this->db->from('tb_device');
        $this->db->join('arduino_rule', 'id_device = id_node');
        return $this->db->get()->result_array();

        // var_dump($this->db->last_query());
    }