Question

遇到PHP错误

严重性：注意

消息：未定义的属性：Magazine :: $ db

文件名：core / Model.php

行号：52

<?php

    class MY_Model extends CI_Model {
        const DB_TABLE = 'abstract';
        const DB_TABLE_PK = 'abstract';


        function __construct(){
            parent::__construct(); // construct the Model class
        }
        /**
         * Create record.
         */
        private function insert() {
            $this->db->insert($this::DB_TABLE, $this);
            $this->{$this::DB_TABLE_PK} = $this->db->insert_id();
        }

        /**
         * Update record.
         */
        private function update() {
            $this->db->update($this::DB_TABLE, $this, $this::DB_TABLE_PK);
        }

        /**
         * Populate from an array or standard class.
         * @param mixed $row
         */
        public function populate($row) {
            foreach ($row as $key => $value) {
                $this->$key = $value;
            }
        }

        /**
         * Load from the database.
         * @param int $id
         */
        public function load($id) {
            $query = $this->db->get_where($this::DB_TABLE, array(
                $this::DB_TABLE_PK => $id,
            ));
            $this->populate($query->row());
        }

        /**
         * Delete the current record.
         */
        public function delete() {
            $this->db->delete($this::DB_TABLE, array(
               $this::DB_TABLE_PK => $this->{$this::DB_TABLE_PK}, 
            ));
            unset($this->{$this::DB_TABLE_PK});
        }

        /**
         * Save the record.
         */
        public function save() {
            if (isset($this->{$this::DB_TABLE_PK})) {
                $this->update();
            }
            else {
                $this->insert();
            }
        }

        /**
         * Get an array of Models with an optional limit, offset.
         * 
         * @param int $limit Optional.
         * @param int $offset Optional; if set, requires $limit.
         * @return array Models populated by database, keyed by PK.
         */
        public function get($limit = 0, $offset = 0) {
            if ($limit) {
                $query = $this->db->get($this::DB_TABLE, $limit, $offset);
            }
            else {
                $query = $this->db->get($this::DB_TABLE);
            }
            $ret_val = array();
            $class = get_class($this);
            foreach ($query->result() as $row) {
                $model = new $class;
                $model->populate($row);
                $ret_val[$row->{$this::DB_TABLE_PK}] = $model;
            }
            return $ret_val;
        }
    }
    ?>

我的控制器是下一个

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

class Magazine extends CI_Controller {

 public function index(){

     $this->load->model('Publication');
     $this->Publication->publication_name = 'Sandy Shore';
     $this->Publication->save();
     echo '<tt><pre>' .  var_export( $this->Publication, TRUE) . '</pre></tt>';

     $this->load->model('Issue');
     $issue = new Issue();
     $issue->publication_id = $this->Publication->publication_id;
     $issue->issue_number=2;
     $issue->issue_date_publication = date('2015-04-21');
     $issue->save();
     echo '<tt><pre>' .  var_export( $issue, TRUE) . '</pre></tt>';

     $this->load->view('magazines');   
 }    


}

Answer 1

请问您的config / autoload.php文件中是否有这行代码？

$autoload['libraries'] = array('database', 'session');

这两个是整个项目中最常用的库。

codeIgniter错误：未定义的属性

1 个答案: