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    <p>I'm not sure if I got your question right but here goes.<br> I think you can use the event <code>[model]_load_after</code> and simply do this:</p> <pre><code>$object = $event-&gt;getObject(); $object-&gt;setIncrementId('12345'); </code></pre> <p>Or if you want to use a decorator class make it look like this:</p> <pre><code>public function __construct(Mage_Sales_Model_Order_Invoice $model) { parent::__construct($model); $model-&gt;setIncrementId($this-&gt;getIncrementId()); } public function getIncrementId() { return '12345'; } </code></pre> <p>I know that this is not exactly a decorator pattern but it should work.<br> I know that when adding a new method to the 'decorator' class you need to add it to attach data to the main model.<br> This is just my idea. I haven't got an other.</p> <p><strong>[EDIT]</strong><br> You can try to rewrite the <code>load</code> method on the object to make it return what you need. But I wouldn't go that way. You can end up screwing a lot of other things.<br> I don't think there is an other way to do it because <code>load</code> always returns the current object no mater what you do in the events dispatched in the method. see <code>Mage_Core_Model_Abstract::load()</code></p> <pre><code>public function load($id, $field=null) { $this-&gt;_beforeLoad($id, $field); $this-&gt;_getResource()-&gt;load($this, $id, $field); $this-&gt;_afterLoad(); $this-&gt;setOrigData(); $this-&gt;_hasDataChanges = false; return $this; } </code></pre> <p>By making it return <code>new Decorator($this)</code>, you might achieve what you need, but just make sure that when calling <code>$model-&gt;doSomething()</code> and <code>doSomething()</code> is not a method in your decorator you still end up calling the original method on the model.</p>
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    1. POIs there any decent way to Decorate models returned from a Magento `[model]_load_after`event?
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    1. COYes I'm aware that this is possible, however that would require to ( in my use-case ) replacing the increment_id in the [model]_load_after event, and restore the original value on [model]_before_save ( and avoid a ->save() call being made in the case Magento would detect this as an actual "change" ( see origData ). However I'd really really prefer not going this way, I just want to "overwrite" what it displays, but I'm not a fan of using local overrides or rewrites for this.
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    2. COupdated the question with an extra clarification at the bottom.
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    3. COI'm sorry for the downvote but this is something is already known to me, if there are no decent solutions I'll bring it back up.
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