Get previous attribute value in Eloquent model event

Ok, I found this quite by chance, as it's not in the documentation at present...

There is a getOriginal() method available which returns an array of the original attribute values:

User::updating(function($user)
{
    if ($user->username != $user->getOriginal('username')) {
        doSomething();
    }

    // If you need multiple attributes you may use:
    // $originalAttributes = $user->getOriginal();
    // $originalUsername = $originalAttributes['username']; 
});

Be careful, prior to Laravel 7 getOriginal ignores attribute type casting.

In Laravel 4.0 and 4.1, you can check with isDirty() method:

User::updating(function($user)
{
    if ($user->isDirty('username')){
        doSomething();
    }
});

You could overload the methods, then call the parent method.