功能介绍:
引用magento开发人员的一句话:
Magento has basic one resource to one table resource。
也即是一个资源对应一张数据表。
当有时候,需要在一个模块中使用多张数据表,配置多个model,那么又该如何配置model呢?
1.创建数据表:
//创建第一张表
CREATE TABLE `custom` (
`custom_id` INT NOT NULL AUTO_INCREMENT,
`name` VARCHAR( 25 ) NOT NULL
PRIMARY KEY (`custom_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
//创建第二张表
CREATE TABLE `customdata` (
`customdata_id` INT NOT NULL AUTO_INCREMENT,
`name` VARCHAR( 25 ) NOT NULL
PRIMARY KEY (`customdata_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
2.编写配置文件
<?xml version="1.0"?>
<config>
<modules>
<Test_Custom>
<active>true</active>
<codePool>local</codePool>
</Test_Custom>
</modules>
</config>
3.配置模块中配置文件etc/config.xml
//找到如下代码
......
<global>
<models>
<custom>
<class>Test_Custom_Model</class>
<resourceModel>custom_mysql4</resourceModel>
</custom>
<custom_mysql4>
<class>Test_Custom_Model_Mysql4</class>
<entities>
//第一张表
<custom><!--这个节点要求对应Model/Mysql4/Custom.php和Model/Mysql4/Custom/Custom.php中的_init('模块名/custom')这个参数,一般要求与表名相同-->
<table>custom</table>
</custom>
//第二张表
<customdata><!--这个节点跟上面的功能一样-->
<table>customdata</table>
</customdata>
</entities>
</custom_mysql4>
</models>
<resources>
<custom_setup><!--这个节点对应sql/custom_setup文件夹的名称保持一致-->
<setup>
<module>Silk_Custom</module>
</setup>
<connection>
<use>core_setup</use>
</connection>
</custom_setup>
<custom_write>
<connection>
<use>core_write</use>
</connection>
</custom_write>
<custom_read>
<connection>
<use>core_read</use>
</connection>
</custom_read>
</resources>
</global>
......
4.创建模型Custom.php和Customdata.php
//app/code/local/Mypackage/Mymodule/Model/Custom.php
<?php
class Mypackage_Mymodule_Model_Test extends Mage_Core_Model_Abstract
{
public function _construct()
{
parent::_construct();
$this->_init('mymodule/Custom');
}
}
?>
//app/code/local/Mypackage/Mymodule/Model/Customdata.php
class Mypackage_Mymodule_Model_Test extends Mage_Core_Model_Abstract
{
public function _construct()
{
parent::_construct();
$this->_init('mymodule/Customdata');
}
}
?>
5.创建资源模型
//app/code/local/Mypackage/Mmodule/Model/Mysql4/Custom.php
<?php
class Mypackage_Mymodule_Model_Mysql4_Custom extends Mage_Core_Model_Mysql4_Abstract
{
public function _construct()
{
$this->_init('mymodule/custom', 'custom_id');//custom_id为表custom的主键
}
}
?>
//app/code/local/Mypackage/Mmodule/Model/Mysql4/Customdata.php
<?php
class Mypackage_Mymodule_Model_Mysql4_Customdata extends Mage_Core_Model_Mysql4_Abstract
{
public function _construct()
{
$this->_init('mymodule/customdata', 'customdata_id');//customdata_id为表customdata的主键
}
}
?>
6.创建一个集合类
//local/Mypackage/Mymodule/Model/Mysql4/Custom/Collection.php
<?php
class Mypackage_Mymodule_Model_Mysql4_Custom_Collection extends Mage_Core_Model_Mysql4_Collection_Abstract
{
public function _construct()
{
parent::_construct();
$this->_init('mymodule/custom');
}
}
?>
//local/Mypackage/Mymodule/Model/Mysql4/Customdata/Collection.php
<?php
class Mypackage_Mymodule_Model_Mysql4_Customdata_Collection extends Mage_Core_Model_Mysql4_Collection_Abstract
{
public function _construct()
{
parent::_construct();
$this->_init('mymodule/customdata');
}
}
?>
7.现在model就配置好了
model配置好后,来做下测试,我们在block中取得数据,然后从模板文件中调取,
<?php
class Mypackage_Mymodule_Block_Custom extends Mage_Core_Block_Template
{
/*
* 循环遍历出option
*/
public function getcustom($field)
{
$customdata=Mage::getModel('custom/customdata')->getCollection()->addfieldtofilter('field',$field);//addfieldtofilter()为过滤条件
$res=$customdata->getData();
//print_r($customdata->getSelectSql(true));//打印出sql语句
foreach ($res as $v)
{
$val=$v['val'];
//echo $val;
echo "<option value='$val'>$val</option>";
}
}
}
在模板文件中输出:
<select name="hook_load">
<option value="">--Select--</option>
<?php echo $this->getcustom('hook_load');?>//调用block中的返回的数据
</select>
<select name="mast">
<option value="">--Select--</option>
<?php echo $this->getcustom('mast');?>//调用block中的返回的数据
</select>
数据库内容所示:
输出如图所示:
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