未定义的变量/试图获取非对象 Codeigniter/PHP 的属性

Question

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我似乎无法弄清楚在单击列表项时使用 JavaScript 显示信息的这种情况有什么问题。我已经在我的控制器中声明了我的变量，但是我得到了一个未定义的变量错误以及一个获取非对象错误的属性。有什么想法吗？非常感谢您的帮助！

以下是错误消息：

A PHP Error was encountered
Severity: Notice

Message: Undefined variable: event

Filename: user/planner_view.php

Line Number: 27

A PHP Error was encountered
Severity: Notice

Message: Trying to get property of non-object

Filename: user/planner_view.php

Line Number: 27

A PHP Error was encountered
Severity: Notice

Message: Undefined variable: event

Filename: user/planner_view.php

Line Number: 29

A PHP Error was encountered
Severity: Notice

Message: Trying to get property of non-object

Filename: user/planner_view.php

Line Number: 29

Status
A PHP Error was encountered
Severity: Notice

Message: Undefined variable: status_options

Filename: user/planner_view.php

Line Number: 32

A PHP Error was encountered
Severity: Notice

Message: Undefined variable: event

Filename: user/planner_view.php

Line Number: 32

A PHP Error was encountered
Severity: Notice

Message: Trying to get property of non-object

Filename: user/planner_view.php

Line Number: 32

A PHP Error was encountered
Severity: Warning

Message: Invalid argument supplied for foreach()

Filename: helpers/form_helper.php

Line Number: 331



Title

A PHP Error was encountered
Severity: Notice

Message: Undefined variable: event

Filename: user/planner_view.php

Line Number: 37

A PHP Error was encountered
Severity: Notice

Message: Trying to get property of non-object

Filename: user/planner_view.php

Line Number: 37

这里是控制器：

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Planner extends Common_Auth_Controller {

    private $end_user;

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

        $this->end_user = $this->ion_auth->user()->row();
        $data['end_user'] = $this->end_user;
        $this->load->vars($data);

        $this->load->model('events_model', 'events');
    }

    public function populate_events()
    {
        $this->load->model('events_model', 'events');
        $this->events->populate_events($this->end_user->id);
    }

    public function index()
    {

        $config['start_day'] = 'sunday';

        $config['month_type'] = 'long';

        $config['day_type'] = 'long';

        $config['show_next_prev'] = TRUE;

        $config['next_prev_url'] = base_url('user/planner/index/');

        $config['template'] = '

            {table_open}<table class="planner">{/table_open}

            {heading_row_start}<tr>{/heading_row_start}

            {heading_previous_cell}<th><a href="{previous_url}">&lt;&lt;</a></th>{/heading_previous_cell}
            {heading_title_cell}<th colspan="{colspan}">{heading}</th>{/heading_title_cell}
            {heading_next_cell}<th><a href="{next_url}">&gt;&gt;</a></th>{/heading_next_cell}

            {heading_row_end}</tr>{/heading_row_end}

            {week_row_start}<tr>{/week_row_start}
            {week_day_cell}<th class="day_header">{week_day}</td>{/week_day_cell}
            {week_row_end}</tr>{/week_row_end}

            {cal_row_start}<tr>{/cal_row_start}
            {cal_cell_start}<td>{/cal_cell_start}

            {cal_cell_content}<span class="day_listing">{day}</span><ul class="event_list">{content}</ul>{/cal_cell_content}
            {cal_cell_content_today}<div class="today"><span class="day_listing">{day}</span><ul class="event_list">{content}</ul>{/cal_cell_content_today}

            {cal_cell_no_content}<span class="day_listing">{day}</span>&nbsp;{/cal_cell_no_content}
            {cal_cell_no_content_today}<div class="today"><span class="day_listing">{day}</span></div>{/cal_cell_no_content_today}

            {cal_cell_blank}&nbsp;{/cal_cell_blank}

            {cal_cell_end}</td>{/cal_cell_end}
            {cal_row_end}</tr>{/cal_row_end}

            {table_close}</table>{/table_close}

        ';

        $this->load->library('calendar', $config);

        $title['title'] = 'Planner';

        $data = $this->events->get_events_for_calendar($this->end_user->id, $this->uri->segment(4), $this->uri->segment(5));

        $calendar['calendar'] = $this->calendar->generate($this->uri->segment(4), $this->uri->segment(5), $data);

        $this->load->view('public/head_view', $title);
        $this->load->view('user/header_view');
        $this->load->view('user/planner_view', $calendar);
        $this->load->view('user/footer_view');
    }

    public function update($event_id)
    {   

        if($_POST)
        {
            $title = $this->input->post('title');
            $status = $this->input->post('status');
            $content = $this->input->post('content');

            $data = array(
                "id" => $event_id,
                "title" => $title,
                "status" => $status,
                "content" => $content
            );

            if ($this->events->update($data))
            {
                echo "YAY";
            }
            else
            {
                echo "CRAP";
            }
        }
        else
        {
            $data = array();

            $data['event'] = $this->events->get($event_id);

            $data['status_options'] = array(
                NULL => "Select",
                "C"  => "Completed",
                "L"  => "Completed Late",
                "N"  => "Not Completed"
            );

            echo $this->load->view("user/planner_view", $data, TRUE);
        }
    }
}

这里是视图：

<?php echo form_open('user/planner/update/'.$event->id, 'id="updateForm"'); ?>

            <h3><?php echo $event->type ?></h3>

            <label for="status">Status</label>
            <?php echo form_dropdown('status', $status_options, $event->status ) ?>
            <br/>
            <br/>

            <label for="title">Title</label>
            <input type="text" id="title" name="title" value="<?php echo $event->title ?>" />
            <br/>
            <br/>

            <label for="content">Content</label>
            <textarea id="content" name="content"><?php echo $event->content ?></textarea>
            <br/>
            <br/>

            <p><?php echo form_submit('submit','Save') ?>

            <?php echo form_close(); ?>

Answer 1

我假设这条线 $data['event'] = $this->events->get($event_id); 是给你带来麻烦的那条线，你觉得这对吗？在将$data 传递到视图之前，您是否可以通过添加以下内容来检查$this->events->get($event_id); 方法是否将对象返回到$data['event]` 数组：

$data['event'] = $this->events->get($event_id);    
var_dump($data);
die();

如果$data['event'] 有可能为空，您应该在视图中使用isset($event); 检查它，然后再尝试在页面中使用它。

Answer 2

我的猜测：您的错误来自控制器索引函数末尾的这一行

$this->load->view('user/planner_view', $calendar);

据我所知$calendar 不包含event 或status_options 的值