codeigniter undefined属性错误模型 [英] codeigniter undefined property error on model

问题描述

我在我的模型中得到undefined属性错误。我使用火柴盒库模块化分离。我的mproduct模型是：

  class MProducts extends Model {
 / * function MProducts（）{
 $ this-> load-> module_model（'cities'，'MCities'）; 
} * / 
 
 public $ home_city_id =''; 
 
 function __construct（）{
 parent :: Model（）; 
 $ this-> home_city_id = $ this-> MCities-> getHomeCityId（）; 
} 
} 
  

我得到这个错误：

 遇到PHP错误
 
严重性：注意
 
消息：未定义属性：MProducts： ：$ MCities 
 
文件名：models / mproducts.php 
 
行号：12 
  

我的mcities模型是：

  class MCities extends Model {
 
 function MCities（）{
 parent :: Model（）; 
} 
 function getHomeCityId（）{
 $ city = get_cookie（'home_city'）; 
 $ this-> db-> select（'id'）; 
 $ this-> db->其中（'name'，$ city）; 
 $ Q = $ this-> db-> get（'omc_cities'）; 
 if（$ Q-> num_rows（）> 0）{
 foreach（$ Q-> result_array（）as $ row）{
 return $ row ['id'] ; 
} 
} 
} 
 
} 
  

我的产品控制器是这样的：

  class Admin extends Shop_Admin_Controller {
 function Admin（）{
 parent :: Shop_Admin_Controller 
 //检查访问权限
 check（'Products'）; 
 // load modules / categories / model / mcats 
 $ this-> load-> module_model（'categories'，'MCats'）; 
 //加载MProducts模型
 $ this-> load-> model（'MProducts'）; 
 // load modules / cities / model / mcities 
 $ this-> load-> module_model（'cities'，'MCities'）; 
 //设置面包屑
 $ this-> bep_site-> set_crumb（$ this-> lang-> line（'backendpro_products'），'products / admin'）; 
} 
 
 
函数索引（）{
 //设置变量
 $ data ['title'] =管理产品; 
 $ data ['products'] = $ this-> MProducts-> getAllProducts（）; 
 $ data ['cities'] = $ this-> MCities-> getCitiesDropDown（）; 
 $ data ['categories'] = $ this-> MCats-> getCategoriesDropDown（）; 
 //我们从语言文件中拉出一个标题字
 $ data ['header'] = $ this-> lang-> line（'backendpro_access_control'）; 
 $ data ['page'] = $ this-> config-> item（'backendpro_template_admin'）。 admin_product_home; 
 $ data ['module'] ='products'; 
 $ this-> load-> view（$ this-> _container，$ data）; 
} 
} 
  

解决方案

你的MProducts的构造函数你这样做： $ this-> MCities-> getHomeCityId（）; 这意味着你尝试获取MProducts对象的MCities var，然后你调用 getHomeCityId（）; 的对象什么不工作，因为看看你的MProducts有没有 MCities var 。

编辑：
您必须在模型中获取一个codeigniter实例，并从CI实例中检索MCities模型。

MProducts应该是这样：

  class MProducts extends Model {
 / * function MProducts （）{
 $ this-> load-> module_model（'cities'，'MCities'）; 
} * / 
 
 public $ home_city_id =''; 
 
 function __construct（）{
 parent :: Model（）; 
 $ CI =& get_instance（）; 
 
 $ this-> home_city_id = $ CI-> MCities-> getHomeCityId（） - > getHomeCityId（）; 
} 
} 
  

我希望这有助。

i am getting undefined property error on my model. I m using matchbox library for modular separation. my mproduct model is:

class MProducts extends Model{
    /* function MProducts(){
        $this->load->module_model('cities','MCities');
     }*/

    public $home_city_id ='';

    function __construct(){
        parent::Model();
        $this->home_city_id = $this->MCities->getHomeCityId();
    }
}

and i get this error :

A PHP Error was encountered

Severity: Notice

Message: Undefined property: MProducts::$MCities

Filename: models/mproducts.php

Line Number: 12

my mcities model is:

class MCities extends Model{

    function MCities(){
        parent::Model();
    }
function getHomeCityId(){
        $city = get_cookie('home_city');
         $this->db->select('id');
         $this->db->where('name', $city);
         $Q = $this->db->get('omc_cities');
         if($Q->num_rows() > 0){
             foreach ($Q->result_array() as $row){
             return $row['id'];
           }
        }
    }

}

i don't know either the way is wrong.

edited my product controller is like this:

class Admin extends Shop_Admin_Controller {
    function Admin(){
        parent::Shop_Admin_Controller();
        // Check for access permission
        check('Products');
        // load modules/categories/model/mcats
         $this->load->module_model('categories','MCats');
        // load the MProducts model
        $this->load->model('MProducts');
        // load modules/cities/model/mcities
        $this->load->module_model('cities','MCities');
        // Set breadcrumb
        $this->bep_site->set_crumb($this->lang->line('backendpro_products'),'products/admin');       
    }


    function index(){
        // Setting variables
        $data['title'] = "Manage Products";
        $data['products'] = $this->MProducts->getAllProducts();
        $data['cities'] = $this->MCities->getCitiesDropDown();
        $data['categories'] = $this->MCats->getCategoriesDropDown();
        // we are pulling a header word from language file
        $data['header'] = $this->lang->line('backendpro_access_control');
        $data['page'] = $this->config->item('backendpro_template_admin') . "admin_product_home";
        $data['module'] = 'products';
        $this->load->view($this->_container,$data);
    }
}

解决方案

In your constructor of MProducts you do this: $this->MCities->getHomeCityId(); this means you try to get the MCities var of the MProducts Object and then you call the getHomeCityId(); of that object what won't work because looking at your MProducts there is no MCities var.

EDIT: You have to get a codeigniter instance inside your model and retreive the MCities model from the CI instance.

MProducts should be like this:

class MProducts extends Model{
    /* function MProducts(){
        $this->load->module_model('cities','MCities');
     }*/

    public $home_city_id ='';

    function __construct(){
        parent::Model();
        $CI =& get_instance();

        $this->home_city_id = $CI->MCities->getHomeCityId()->getHomeCityId();
    }
}

I hope this helps.

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