一个简单的magento模型，实体配置
<?xml version="1.0" encoding="UTF-8"?><config><modules><App_Helloworld><version>0.2.0</version></App_Helloworld></modules><global> <models> <helloworld> <class>App_Helloworld_Model</class> <resourceModel>helloworld_mysql4</resourceModel> </helloworld> <helloworld_mysql4> <class>App_Helloworld_Model_Resource_Mysql4</class> <entities> <blogpost> <table>blog_posts</table> </blogpost> </entities> </helloworld_mysql4> </models> <!--resource 可略，使用默认 --> <resources> <helloworld_write> <connection> <use>default_write</use> </connection> </helloworld_write> <helloworld_read> <connection> <use>default_read</use> </connection> </helloworld_read> </resources></global></config>?
