在 null codeigniter 上调用成员函数 record_count()

Question

尝试从包含成员列表的数据库中设置一些分页。我有一个返回结果的查询，但我无法将其合并到我在互联网上找到的分页示例中。现在，当我尝试加载我的成员列表时，我在 null 错误上收到对成员函数 record_count() 的调用。下面是代码。

型号

public function count_members()
{
    return $this->db->count_all("Users");
}

public function getMembers($limit, $start)
{
    $this->db->limit($limit, $start);
    $query = $this->db->get("users");

    if ($query->num_rows() > 0){
        foreach ($query->result() as $row) {
            $data[] = $row;
        }

        return $data;
    }
    return false;
    /*if ($id == null) {
        $query = $this->db->get('users');
    }else{
        $query = $this->db->get_where('users', ['id' => $id]);
    }
    return $query->result();  */
}

查看

<h1>Member Listing</h1>
<table border="1" align="center">
<thead>
    <th>First Name</th>
    <th>Last Name</th>
    <th>Email Address</th>
    <th>Status</th>
    <th>Last Login</th>
    <th>Delete</th>
    <th>Write Up</th>
<thead>
<tbody>
    <?php foreach ($members as $_key => $_value): ?>
<tr>
    <td><?=$_value->first_name?></td>
    <td><?=$_value->last_name?></td>
    <td><?=$_value->email?></td>
    <td><?=$_value->status?></td>
    <td><?=$_value->last_login?></td>
    <td><a href="<?=site_url("admin/delete_member/{$_value->id}");?>">[X]</a></td>
</tr>
<?php endforeach;?>
<?php echo $links; ?></p>
</tbody>
</table>
<a href="<?php echo base_url(); ?>admin/home">Back to Dashboard</a>

控制器

public function view_members()
    {
        $this->load->model('Users_model');
        $config = array();
        $config["base_url"] = base_url() . "admin/view_members";
        $config["total_rows"] = $this->Users->record_count();
        $config["per_page"] = 20;
        $config["uri_segment"] = 3;

        $this->pagination->initialize($config);

        $page = ($this->uri->segment(3)) ? $this->uri->segment(3) : 0;
        $data["results"] = $this->Users->getMembers($config["per_page"], $page);
        $data["links"] = $this->pagination->create_links();

        //$this->data['members'] = $this->Users_model->getMembers();
        $this->load->view('admin/inc/admin_header');
        $this->load->view('admin/view_members', $this->data);
        $this->load->view('admin/inc/admin_footer');
    }

错误消息 遇到 PHP 错误

严重性：通知

消息：未定义的属性：Admin::$users

文件名：controllers/Admin.php

行号：217

致命错误：在第 217 行的 G:\xampp\htdocs\highball061516\application\controllers\Admin.php 中调用一个成员函数 count_members() on null 遇到 PHP 错误

严重性：错误

消息：在 null 上调用成员函数 count_members()

文件名：controllers/Admin.php

行号：217

Answer 1

在代码点火器分页中，$config["total_rows"] 参数要求数据库中存在的记录总数。在您的代码中，它从模型中不存在的函数中获取此计数。它应该从count_members 获取它。这是更新后的控制器代码：

public function view_members()
{
    $this->load->model('Users_model');
    $config = array();
    $config["base_url"] = base_url() . "admin/view_members";

    // Code modified here
    $config["total_rows"] = $this->Users_model->count_members();

    $config["per_page"] = 20;
    $config["uri_segment"] = 3;

    $this->pagination->initialize($config);

    $page = ($this->uri->segment(3)) ? $this->uri->segment(3) : 0;
    $data["results"] = $this->Users->getMembers($config["per_page"], $page);
    $data["links"] = $this->pagination->create_links();

    //$this->data['members'] = $this->Users_model->getMembers();
    $this->load->view('admin/inc/admin_header');
    $this->load->view('admin/view_members', $this->data);
    $this->load->view('admin/inc/admin_footer');
}