AutoCRUD

liukun2009

　　AutoCRUD是一个php下的持久层，虽然它目前只支持MySQL数据库，但是它无需配置，也很方便实用。
　　已建立下面几个表为例
　　CREATE TABLE `article` (
  `articleid` smallint(5) UNSIGNED NOT NULL AUTO_INCREMENT,
  `title` varchar(255) NOT NULL DEFAULT '',
  `content` text,
  `datetimestamp` int(10) UNSIGNED NOT NULL DEFAULT '0',
  PRIMARY KEY  (`articleid`)
) TYPE=MyISAM AUTO_INCREMENT=1 ;
　　CREATE TABLE `article2category` (
  `article` smallint(5) UNSIGNED NOT NULL DEFAULT '0',
  `category` smallint(5) UNSIGNED NOT NULL DEFAULT '0',
  PRIMARY KEY  (`article`,`category`)
) TYPE=MyISAM;
　　CREATE TABLE `category` (
  `categoryid` smallint(5) UNSIGNED NOT NULL AUTO_INCREMENT,
  `title` varchar(255) NOT NULL DEFAULT '',
  `parent` smallint(5) UNSIGNED DEFAULT '0',
  PRIMARY KEY  (`categoryid`)
) TYPE=MyISAM AUTO_INCREMENT=1 ;
　　CREATE TABLE `comment` (
  `commentid` bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT,
  `title` varchar(25) DEFAULT '',
  `author` varchar(255) DEFAULT NULL,
  `article` smallint(6) NOT NULL DEFAULT '0',
  PRIMARY KEY  (`commentid`),
  KEY `article` (`article`)
) TYPE=MyISAM AUTO_INCREMENT=1 ;
　　CREATE TABLE `user` (
  `userid` smallint(5) UNSIGNED NOT NULL AUTO_INCREMENT,
  `username` varchar(255) NOT NULL DEFAULT '',
  `password` varchar(255) DEFAULT '',
  PRIMARY KEY  (`userid`),
  UNIQUE KEY `username` (`username`)
) TYPE=MyISAM AUTO_INCREMENT=1;
　　基本操作
　　1 初始化
　　<?php
include ('autocrud/autocrud.php');
　　$crud = new AutoCRUD;
$result = $crud->connect ('sa', '', 'demo');
　　if (autocrud_is_error($result) == true) {
        // error occured, find out what error
        echo $result->getCode() . ': ' . $result->getMessage();
        die();
}
　　$crud->generate();  // 该函数会自动生成一些存取数据所用的代码到数据库里面
　　?>
　　2 插入纪录
　　<?php
// ...
// setup AutoCRUD
// ...
　　$new_row = array('title' => 'My article', 'content' => 'Article content goes here', 'datetimestamp' => time());
$result = $crud->article->insert ($new_row);
　　if (autocrud_is_error($result) == true) {
        // error occured, find out what error
        echo $result->getCode() . ': ' . $result->getMessage();
        die();
}
　　echo 'Row inserted';
　　?>
　　3 更新纪录
　　<?php
$row = array('title' => 'New title 2', 'content' => 'New Article content goes here', 'datetimestamp' => time());
　　$id = '1';
$crud->article->where = "articleid = " . $crud->quote($id);
$result = $crud->article->update ($row);
　　// we left out the title, so error should be returned
　　if (autocrud_is_error($result) == true) {
        // error occured, find out what error
        echo $result->getCode() . ': ' . $result->getMessage();
        die();
}
　　echo 'Record updated';
　　?>
　　4 删除纪录
　　<?php
// ...
// setup AutoCRUD
// ...
　　$crud->article->delete(1);
echo 'Record delete';
　　?>
　　
　　5 选择纪录
　　<?php
// ...
// setup AutoCRUD
// ...
　　// Get a list of articles
$list = $crud->article->select();
　　echo 'Number of records: ' . count($list) . '';
foreach ($list as $article) {
        echo $article['title'] . '';
}
?>
　　
　　<?php
// Specify WHERE and ORDER BY
$crud->article->where = "articleid != 6";
$crud->article->orderby = "title DESC";
　　// Get a list of articles
$list = $crud->article->select();
　　echo 'Number of records: ' . count($list) . '';
foreach ($list as $article) {
        echo $article['title'] . '';
}
?>
　　翻页处理
　　<?php
// Do paging
$crud->article->paging = true; # Enable paging
$crud->article->perpage = 2; # Set number of records to show per page
$crud->article->currentpage = (empty($_GET['page'])) ? 1 : $_GET['page']; # Set current page
　　// Get a list of articles
$list = $crud->article->select();
　　echo 'Number of records: ' . count($list) . '';
foreach ($list as $article) {
        echo $article['title'] . '';
}
　　if ($crud->article->currentpage > 1) {
        echo '<a href="?page=' . ($crud->article->currentpage-1) . '">Previous Page</a>&nbsp;';
}
　　if ($crud->article->currentpage < $crud->article->totalpages) {
        echo '&nbsp;<a href="?page=' . ($crud->article->currentpage+1) . '">Next Page</a>';
}
　　?>
　　
　　<?php
// Get article #5
$article = $crud->article->get(5);
　　if ($article == false) {
        echo 'Article doesn\'t exist';
}
　　echo '<pre>';
print_r ($article);
echo '</pre>';
　　?>
　　
　　6 处理多表连接
　　<?php
// Setup relationship
$crud->comment->addRelationship ($crud->article, 'article', 'articleid', 'many-to-one');
　　// Get articles and their comments
$crud->article->join ('comment');
$articles = $crud->article->select();
　　echo '<pre>';
print_r ($articles);
echo '</pre>';
　　?>
　　
　　<?php
// Setup relationship
$crud->comment->addRelationship ($crud->article, 'article', 'articleid', 'many-to-one');
　　// Get comments and their article
$crud->comment->join ('article');
$comments = $crud->comment->select();
　　echo '<pre>';
print_r ($comments);
echo '</pre>';
?>
　　
<?php
// Setup relationship
$crud->article2category->addRelationship ($crud->category, 'category', 'categoryid', 'many-to-many');
$crud->article2category->addRelationship ($crud->article, 'article', 'articleid', 'many-to-many');　　// Get articles and the categories they belong to
$crud->article->join ('category');
$articles = $crud->article->select();
　　echo '<pre>';
print_r ($articles);
echo '</pre>';
　　?>