Magento Event Observers or Custom Modules Not Working On Production

Question

I'm attempting to use multiple observer classes & modules for Magento, all of which are being put into app/code/local. These all work on my local workstation, but will NOT work when I copy them to production via FTP. I am going crazy trying to figure out what's going on. All of my code seems sound. Here's an example of an observer:

app/code/local/Mural/Pricing/Model/Observer.php

<?php 
class Mural_Pricing_Model_Observer {
    public function setMuralPricing($observer) {
        echo 'We did it!';
        die();
    } 
}

app/code/local/Mural/etc/config.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Mural_Pricing>
            <version>0.0.1</version>
        </Mural_Pricing>
    </modules>
    <global>
        <models>
            <Mural_Pricing>
                <class>Mural_Pricing_Model</class>
            </Mural_Pricing>
        </models>
    </global>
    <adminhtml>
        <events>
            <sales_quote_add_item>
                <observers>
                    <Mural_Pricing>
                        <class>mural_pricing/observer</class>
                        <method>setMuralPricing</method>
                    </Mural_Pricing>
                </observers>
            </sales_quote_add_item>
        </events>
    </adminhtml>
</config>

app/etc/modules/Mural_Pricing.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Mural_Pricing>
            <codePool>local</codePool>
            <active>true</active>
            <depends>
                <Mage_Catalog />
            </depends>
        </Mural_Pricing>
    </modules>
</config>

Like I said, this works fine locally, but not in production, with several different observers & modules. Frustrating. Thank you in advance!

scrowler scrowler · Accepted Answer · 2015-12-10T19:41:06

The first thing I notice is that your observer declaration is to call mural_pricing/observer::setMuralPricing() on your observed event.

If you look at the config XML, you're registering models in this module as Mural_Pricing/... as per this XML:

<models>
    <Mural_Pricing>
        <class>Mural_Pricing_Model</class>
    </Mural_Pricing>
</models>

Magento best practice seems to be to use all lowercase for class aliases, so I suggest you change that to mural_pricing. It will also work if you change your observer declaration to use the uppercased equivalent.

On another point, I don't think it actually matters what you name this tag, but the <Mural_Pricing> tag underneath <observers> should ideally represent a short description of what your observer does (again, don't think it actually matters) - e.g. <mural_pricing_set_pricing>.

Finally, it has to be said - ensure that you've cleared your cache correctly to re-parse the XML configuration. If you're using Redis or another caching architecture in production vs dev/staging/local then you may have forgotten to clear your cache a different way to how you do it locally.

Ultimately, your module looks fine other than the case difference in the class alias and observer declaration.

Magento Event Observers or Custom Modules Not Working On Production

1 Answers