Set/Get Date Mutator in Pivot

Hi all,

is it possible set date mutator in pivot relations? This is my tables structures :

foo :

• id
• title

bar :

• id
• title

foo_bar

• id
• foo_id
• bar_id
• start_date
• end_date

and related models:

Foo Model

<?php namespace App;

use Illuminate\Database\Eloquent\Model;

class Foo extends Model {
    public function bar()
    {
        return $this->belongsToMany('Bar 'foo_bar')->withPivot('start_date', 'end_date');
    }

    public function newPivot(\Illuminate\Database\Eloquent\Model $parent, array $attributes, $table, $exists)
    {
        return new FooBar($parent, $attributes, $table, $exists);
    }
}

Bar Model :

<?php namespace App;

use Illuminate\Database\Eloquent\Model;

class Bar extends Model {
    public function foo()
    {
        return $this->belongsToMany('Foo 'foo_bar')->withPivot('start_date', 'end_date');
    }

    public function newPivot(\Illuminate\Database\Eloquent\Model $parent, array $attributes, $table, $exists)
    {
        return new FooBar($parent, $attributes, $table, $exists);
    }
}

And FooBar Pivot

<?php namespace App;

use Illuminate\Database\Eloquent\Relations\Pivot;
use Carbon\Carbon;

class FooBar extends Pivot {

    public function getStartDateAttribute($value)
    {
        if ($value)
            return Carbon::createFromFormat('Y-m-d', $value)->format('d/m/Y');
    }
    public function getEndDateAttribute($value)
    {
        if ($value)
            return Carbon::createFromFormat('Y-m-d', $value)->format('d/m/Y');
    }
    public function setStartDateAttribute($value)
    {
        $this->attributes['start_date'] = Carbon::createFromFormat('d/m/Y', $value)->toDateString();
    }
    public function setEndDateAttribute($value)
    {
        $this->attributes['end_date'] = Carbon::createFromFormat('d/m/Y', $value)->toDateString();
    }
}

Test :

$fooData1 = ['title' => 'foo test 1' ]; 
$foo1 = Foo::create($fooData1); 

$fooData2 = ['title' => 'foo test 2' ]; 
$foo2 = Foo::create($fooData2); 

$fooBar1 = [ 'start_date' => '20/03/2015', 'end_date' => '25/03/2015' ]; 
$fooBar2 = [ 'start_date' => '20/02/2015', 'end_date' => '25/02/2015' ]; 

$bar->foo()->sync( [$foo1->id => $fooBar1] ); 
$bar->foo()->sync( [$foo2->id => $fooBar2] );

Set date mutator not work!

Thanks!