overriding Mage_Tag_Model_Resource_Tag_Relation

Question

I need to override Mage_Tag_Model_Resource_Tag_Relation for a site I'm working on.

I have already created my class that extends Mage_Tag_Model_Resource_Tag_Relation:

class Web_Core_Model_Tag_Resource_Tag_Relation extends Mage_Tag_Model_Resource_Tag_Relation
{
    public function loadByTagCustomer($model)
    {
    [...]
    }
}

And placed that in the file app/code/local/Web/Core/Model/Tag/Resource/Tag/Relation.php

In the module's config.xml (which is activated, since there are other parts of the module that are working, I added:

<global>
  <models>
    <core>
      <rewrite>
       <mage_tag_model_resource_tag_relation>
        Web_Core_Model_Tag_Resource_Tag_Relation
       </mage_tag_model_resource_tag_relation>
     </rewrite>
    </core>
 </models>
</global>

I'm guessing this is wrong, since it is not working... How should I declare the overriding in my config.xml? Am I in the right track?

Answer 1

You did not rewrite resource class in proper method and did not follow up magento resource model class format that why it does not override properly.

Basic format of overwrite a resource class is

   <models>
        <rewriteableModuleResourceClassIndenfiter>
            <rewrite>
                <Rest_Of_ClassName_Of_Resource_class>Your_Write_Class_Name</Rest_Of_ClassName_Of_Resource_class>
            </rewrite>
        </<rewriteableModuleResourceClassIndenfiter>
    </models>

Brief:

As per as ,magento tag_resource is resource type of magento Mage_Tage module,which prefix class is Mage_Tag_Model_Resource

See at config.xml of Mage_Tag Module

 <tag_resource>
                <class>Mage_Tag_Model_Resource</class>

You modified code:

<models>
    <tag_resource>
        <rewrite>
            <tag_relation>Web_Core_Model_Tag_Resource_Tag_Relation</tag_relation>
        </rewrite>
    </tag_resource>
</models>