Sonata admin - “order by” field in related table

Question

I have a Product admin class. The Product entity has a many-to-one relationship with a Category entity, i.e. a product is associated with a category.

In the admin \"list

Answer 1

Asume name is the property of entity Category by wich you want to sort. You may do this in you ProductAdmin.php

protected function configureListFields(ListMapper $listMapper)
{

     $listMapper->add('category.name', null, array(
            'sortable' => true,
     ));
     ...
}

This way you leverage the ordering links in the header of the list, generated by Sonata.

Edit

If you would also like to have a link on the category name in products list to quickly edit the Category entity, assuming you have created a CategoryAdmin class, you should write your code like this:

protected function configureListFields(ListMapper $listMapper)
{

     $listMapper->add('category', null, array(
            'sortable' => 'category.name',
     ));
     ...
}

And in your Category class you should implement the __toString() method like this:

public function __toString()
{
    return $this->getName();
}