how to override adminhtml block for a function?

Question

Urapidflow has an issue which casued by a security patch and even their new version does not resolve the issue, the path for module file that I want to write an override is:

app\code\community\Unirgy\RapidFlow\Block\Adminhtml\Profile\Edit\Tab\Upload.php

anyways I have to rewrite the following:

  $this->getUploader()->getConfig()

this should be

 $this->getUploader()->getUploaderConfig()

to work fine. here is the module path: Unirgy_RapidFlow_Block_Adminhtml_Profile_Edit_Tab_Upload

I am creating a module to rewrite the functions inside it, here is what I did:

app\code\local\Scosche\Unirgy\etc\config.xml

<config>
    <modules>
        <Scosche_Unirgy>
            <version>0.0.1</version>
        </Scosche_Unirgy>
    </modules>
    <global>
        <blocks>
            <scosche_unirgy>
                <class>Scosche_Unirgy_Block</class>
            </scosche_unirgy>
             <unirgy_rapidFlow>
                <rewrite>
                    <adminhtml_profile_edit_tab_upload>Scosche_Unirgy_Block_Adminhtml_Profile_Edit_Tab_Upload</adminhtml_profile_edit_tab_upload>
                </rewrite>
             </unirgy_rapidFlow>
        </blocks>
    </global>
</config>

This is wrong for some reason I created the same folders and path on scosche module but although I can see module is active in Advanced configuration, it is not working, app\code\community\Unirgy\RapidFlow\etc\config.xml:

<blocks>
    <urapidflow><class>Unirgy_RapidFlow_Block</class></urapidflow>
</blocks>

please let me know what's wrong.

Answer 1

As discussed in the comments, one common mistake is the assumption that for example a model or block rewrite is to be done based on Vendor_Modulename.

This means, to create a proper rewrite for a core and/or a third party module the one must take a look at the modules etc/config.xml and find the actual alias/identifier that is defined for the model or block in question.

A basic example:

In case you want to rewrite a certain method of app/code/core/Mage/Catalog/Block/Product.php you'll first have to check in app/code/core/Mage/Catalog/etc/config.xml to find something like this:

<config>
    [...]
    <global>
        [...]
        <blocks>
            <catalog> <!-- this is our node of interest -->
                <class>Mage_Catalog_Block</class>
            </catalog>
        </blocks>
        [...]
    </global>
    [...]
</config>

This tells us, that our rewrites must be based on catalog (rather than mage_catalog or anything else). This then will allow us to rewrite a block class in our custom module by setting up something like the following:

<config>
    [...]
    <global>
        [...]
        <blocks>
             <catalog> <!-- based on what we found in app/code/core/Mage/Catalog/etc/config.xml/ -->
                <rewrite>
                    <product>Vendor_Module_Block_Product</product>
                </rewrite>
             </catalog>
        </blocks>
        [...]
    </global>
    [...]
</config>