Problems extending core review block helper

Question

I'm trying to extend the review block helper located at /app/code/core/core/Mage/Review/Block/Helper.php. I've created a new module at /app/code/local/MyModule/Review/Block/Helper.php which includes and extends the parent class as follows:

include('Mage/Review/Block/Helper.php');

class Mymodule_Review_Block_Helper extends Mage_Review_Block_Helper
{

I've also created a config.xml file at app/code/local/Mymodule/etc/config.xml which contains the following:

<?xml version="1.0"?>
<config>
    <modules>
       <Mymodule>
            <version&gt;1.0.1</version>
       <;/Mymodule>
   </modules>
   <global>
      <blocks>
       <review>
         <rewrite>
           <mage_review_block_helper>Mymodule_Review_Block_Helper</mage_review_block_helper>
         </rewrite>
        </review>
      </blocks>
   </global>
</config>

However, any method changes that I drop into my file I not being implemented on the front end, with or without flushing the cache.

I suspect it's something as simple as the keys in the XML not being correct but I can't work out what that correct nesting should be.

Any help would be appreciated.

Thanks

Answer 1

Your config.xml should look like this:

<?xml version="1.0"?>
<config>
    <modules>
       <Mymodule>
            <version>1.0.1</version>
       </Mymodule>
   </modules>
   <global>
      <blocks>
       <review>
         <rewrite>
           <helper>Mymodule_Review_Block_Helper</helper>
         </rewrite>
        </review>
      </blocks>
   </global>
</config>

and you can remove include('Mage/Review/Block/Helper.php'); from your class file. It will be autoloaded when needed.

Answer 2

there are lot of issue in your module

1.for block type rewrite ,you donot need to add Parent class in include path.

include('Mage/Review/Block/Helper.php'); Just remove it

2.Rewrite code is wrong.

<mage_review_block_helper>Mymodule_Review_Block_Helper</mage_review_block_helper>

should be

<helper>Mymodule_Review_Block_Helper</helper>

3.Your module declarationn in config.xml wrong:

 <modules>
       <Mymodule>
            <version&gt;1.0.1</version>
       <;/Mymodule>
   </modules>

should be

<modules>
       <Mymodule_Review>
            <version>1.0.1</version>
       </Mymodule_Review>
   </modules>