php - Loading a resource model in Magento- failed to open file -

i trying ues resource model , following when try load it:

warning: include(mage\core\resource\model.php): failed open stream: no such file or directory in c:\xampp\htdocs\magento\lib\varien\autoload.php on line 93

my controller action looks like:

$blogpost = mage::getmodel("test/blogpost"); $blogpost->load(1); 

my config.xml looks like:

<?xml version="1.0"?> <config>   <modules>     <lock_test>       <version>1.0.0</version>     </lock_test>   </modules>     <global>         <models>             <test>                 <class>lock_test_model</class>                 <resourcemodel>test_resource</resourcemodel>             </test>             <test_resource>                 <class>lock_test_model_resource</class>             </test_resource>         </models>     </global>   <frontend>     <routers>       <lock_router>         <use>standard</use>         <args>           <module>lock_test</module>           <frontname>test</frontname>         </args>       </lock_router>     </routers>   </frontend> </config> 

i have no idea why trying load mage directory. can't see wrong config file.

i'm loosly following this tutorial, although haven't created entities , table name above, think should still find resource model.

please help!

app\code\local\lock\test\model\blogpost.php like:

<?php     class lock_test_model_blogpost extends mage_core_model_abstract     {         protected function _construct()         {             $this->_init("test/blogpost");         }     } 

app\code\local\lock\test\model\resource\blogpost.php looks like:

<?php     class lock_test_model_resource_blogpost extends mage_core_resource_model     {         protected function _construct()         {             $this->_init("test/blogpost", "blogpost_id");         }     } 

the problem in resource model

class lock_test_model_resource_blogpost extends mage_core_resource_model 

there no such class mage_core_resource_model, why magento tries find him in mage\core\resource\model.php. want extend mage_core_model_resource_db_abstract.