Question

我在CI框架中创建了一个侧面类别菜单栏，每当我点击一个类别链接时，它会转到类别视图页面和右侧链接，例如：Product / category / 3但它没有显示属于category_id = 3的产品。

我没有显示属于该类别的某些产品，而是收到此错误消息：

A PHP Error was encountered

Severity: Error

Message: Cannot use object of type stdClass as array

Filename: views/category.php

Line Number: 41

这是category.php中的第41行：

<a href="<?php echo base_url() ?>/Product/details/<?php echo $product['product_id']; ?>">

所以我猜这意味着我无法在category.php视图页面上回应产品详细信息？但我不确定是什么导致了这个问题。

这是category.php视图文件：

<?php   include_once ('templates/header.php');  ?>

<!-- Alle cadeaus gele title bovenaan pagina -->

<div class="container-fluid">
    <div class="row">
        <div class="col-lg-12 bg-warning" style="font-size:25px">
            <center>Alle cadeaus</center>
        </div>
        </div>
</div>

 <hr />

<br>

<!-- Cadeau categorie side menu -->
<div class="container-fluid">
    <div class="row">
            <div class="col-md-4">
                <div id="categorymenu">
                    <center>  <h3>Categorieën</h3> </center>
                    <ul class="list-group">
                         <?php foreach (get_categories_h() as $category) : ?>
             <li class="list-group-item">
                 <a href="<?php echo base_url().'Product/category/' . $category->id; ?>"> <?php echo $category->name; ?></a>
            </li>
         <?php endforeach; ?>
                    </ul>
                </div>
            </div>




<!-- Laat cadeau zien op alle cadeaus pagina -->
<div class="col-md-8">
<?php foreach($products as $product) : ?>
    <div class="col-md-2">
        <div id="product">
        <a href="<?php echo base_url() ?>/Product/details/<?php echo $product['product_id']; ?>">
          <img src="<?php echo base_url(); ?>upload/<?php echo $product['product_foto_thumb']; ?>">
        </a>
        <div class="product_naam"><?php echo $product['product_naam']; ?></div>
        <div class="ophaal_plaats">
           <?php  echo $product['ophaal_plaats']; ?>
        </div>
        <div class="aangeboden_door">
            <p>Aangeboden door: Peter</p>
              </div>
        </div>
        </div>


<?php endforeach; ?>

</div>



<div class="clearfix"></div>

 <?php   include_once ('templates/footer.php');  ?>

我的Product.php控制器文件：

<?php
 defined('BASEPATH') OR exit('No direct script access allowed');
 class Product extends CI_Controller { 


    var $data = array();

     public function index()
 {

  //Laad kado uploaden view
  $this->load->view('product_form', $this->data);
 }

 public function details($product_id)
 {
  //load the Product_model
  $this->load->model('Product_model');

  //call function getdata in de Product_model
  $data['userdetail_list'] = $this->Product_model->getdata();

  //get product details
  $data['product'] = $this->Product_model->get_product_details($product_id);

  //laad view
  $data['main_content'] = 'details';
  $this->load->view('details',$data); 
 }
 //categorie product function
 public function category($id)
 {
  $data['title'] = 'Category';
  $data['page'] = 'Product/category';
  $data['category'] = $this->Category_model->findByCategory($id);
  $data['products'] = $this->Product_model->findByCategory($id);
  $this->Category_model->findByCategory($id);
  $this->load->view('category', $data);
 }

 public function __construct()
 {
  parent::__construct();
  $this->load->model('Product_model');
  $this->load->helper(array('form', 'url'));
 }

我的Product_model文件：

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

class Product_model extends CI_model {

    public function saveProduct($data) { 
        $this->db->insert('products', $data);
        $product_id = $this->db->insert_id();
        return $product_id;
    }
      public function getdata()
    {
        $this->db->select('users.user_id,users.email,users.voornaam,products.product_id,products.category_id,products.product_naam');
        $this->db->from('users');
        $this->db->join('products','products.user_id = users.user_id');
        $query = $this->db->get();
        if($query->num_rows()>0)
        {
           return $query->result_array();
        }
    }

    public function get_product_details($product_id) {
        $arrReturn = array();
        $this->db->select('*');
        $this->db->from('products');
        $this->db->where('product_id', $product_id);
        $query = $this->db->get();
        $result = $query->result_array();
        if (!empty($result)) {
            $arrReturn = $result[0];
        }
        return $arrReturn;
    }


    /*
      Get categories
     */
    public function get_categories(){
        $this->db->select('*'); 
        $this->db->from('categories'); 
        $query = $this->db->get(); 
        $result = $query->result();
        return $result;
    }


    public function findAll(){
        return $this->db->get('products')->result();
    }

     public function findByCategory($id){
         $this->db->where('id', $id);
        return $this->db->get('categories')->result();
    }




}
?>

Category_model文件：

<?php


class Category_model extends CI_Model {

    public function findAll(){
        $this->db->get('categories')->result();
    }

    public function findByCategory($id)
    {
        $this->db->where('id', $id);
        $this->db->get('categories')->result();
        return $this->db->get('categories')->row();
    }

}


?>

我的db_helper.php文件（可能是不必要的代码）

<?php if (!function_exists('get_categories_h')) {
    function get_categories_h(){
        $CI = get_instance();
        $categories = $CI->Product_model->get_categories();
        return $categories;
    } } ?>

（以及一些数据库表信息，如果有人想看看我的数据库是什么样的）：

Table 1: 5 columns: products
-product_id
-product_naam
-product_beschrijving
-user_id
-category_id

table 2: categories: 2 columns:
1.id
2.name

当我打印$ products :(）时：（文字很长，因为我想要长产品说明）

新错误：

A PHP Error was encountered

Severity: Notice

Message: Undefined property: stdClass::$product_id

Filename: views/category.php

Line Number: 41

Backtrace:

File: /home/ubuntu/workspace/application/views/category.php
Line: 41
Function: _error_handler

File: /home/ubuntu/workspace/application/controllers/Product.php
Line: 38
Function: view

File: /home/ubuntu/workspace/index.php
Line: 315
Function: require_once


A PHP Error was encountered

Severity: Error

Message: Cannot use object of type stdClass as array

Filename: views/category.php

Line Number: 42

Backtrace:

Answer 1

在您的产品型号中更改您的findByCategory函数：

public function findByCategory($id){
              $this->db->select('*'); 
              $this->db->where('id', $id);
              $q = $this->db->get('products');
              if($q->num_rows() > 0) { 
                  foreach ($q->result() as $row) { 
                      $data[] = $row; 
                  }
                  return $data; 
              } 
          }

并且您的Category_model需要更改：

public function findByCategory($id)
          {
              $this->db->select('*'); 
              $this->db->where('id', $id);
              $q = $this->db->get('categories');
              if($q->num_rows() > 0) { 
                  foreach ($q->result() as $row) { 
                      $data[] = $row; 
                  }
                  return $data; 
              } 
          }

问题是因为你的product_model函数得到了类别表，但只有id, name，所以你需要获取产品表中的数据。

未显示

1 个答案: