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Colt

Hi,
I'm trying to use an observer to intercept fields before save and after retrieval, so that I can encrypt some values.

I want to be able to exclude certain fields defined from within the model itself, but I'm unsure how to approach this. I've tried the following:

Within my model:

protected static $_observers = array(
'Encryption' => array(
// set field true to exclude from validation
'exclude' => array(
'size' => true
)
),
)

class Observer_Encryption extends Orm\Observer
{
public static $exclude = array();

public function __construct($class)
{
$props = $class::observers(get_class($this));
$this->_props = $props;
$this->_exclude = isset($props['exclude']) ? $props['exclude'] : static::$exclude;
}

// called by the save() method before anything is done
public function after_load(Orm\Model $model)
{
\Log::info('[props val: '.print_r( $this->_props, true ));

foreach ($model as $key => $value) {
if ($key !='id' && $key != 'updated_at' && $key != 'created_at' && $key != 'size'){
$model->$key = Crypt::decode($value);
}
}

}
}

When I log _props or _exclude I've no values set, should I be able to pass in params in this way?
Thanks in advance!

Harro

Maybe this helps.

This is one of our observers, that uses properties: https://bin.fuelphp.com/snippet/view/OX

The observer is defined in the model like so: https://bin.fuelphp.com/snippet/view/OY

Colt

Thanks for this, I have the code together but I still can't seem to get the props to come through, perhaps its due to name spacing or similar? I have the observer in classes/observer/encryption defined as "Observer_Encryption"

I can't work out why the param isn't being passed to the observer :(

https://bin.fuelphp.com/snippet/view/O0

https://bin.fuelphp.com/snippet/view/O1

Harro

class names in strings must always be fully qualified, so

'Encryption' => array(

is not correct, you need to include the namespace in there, like you do for the other two.

Colt

Interestingly though, it is loading that observer correctly. I'll try the full path and see if it works thanks

Harro

That might work if it's in the current namespace.

But the props are accessed like so:

$props = $class::observers(get_class($this));

which fails since get_class() returns a fully qualified classname, including namespace, but the props are stored without the namespace.

Colt

Ah, that makes sense. I'm just struggling with determining the actual namespace for the encryption.php file I've placed in /classes/observer/

I really need to brush up on how the framework uses the file paths to establish the namespace.

I tried to add:

namespace Model;

class Observer_Encryption extends Orm\Observer

As shown in your example, and then add the observer as

Model\Observer_Encryption

to the model

But that triggers throw new \UnexpectedValueException($observer)

Harro

If the file is /classes/observer/encryption.php, and the class is called "Observer_Encryption", then it doesn't have a namespace (it is in the global namespace).

This explains exactly how it works: https://fuelphp.com/docs/general/namespacing.html

This in turn means the correct definition should be:

'Observer_Encryption' => array(

Colt

Thanks, that is how it's currently set. But that isn't allowing params to be passed, so I need to set a namespace presumably so I can have a fully qualified namespace?

Thanks

Colt

Ok, i've moved it to model/observer/encryption

set the namespace to

namespace Model;

class Observer_Encryption extends \Orm\Observer

Defined it in the model as

'Model\Observer_Encryption'

Bingo, it's working!

Thanks a lot!

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