Sonata Admin Bundle: show total count of collection on list view

Question

Is there any way to show total count of collection on list view? Imagine that there is a user that can have many links. How can I show total links count on list view?

Answer 1

with Sonata 3.** in somwhere in Admin***.php script for listing all fields:

    protected function configureListFields(ListMapper $listMapper)
    {
        $listMapper
//...
            ->addIdentifier('getCommentsCount', IntegerType::class, [ 'label' => '#Comments'])
        ;
    } 

Where in Entity i written something like this:

    public function getCommentsCount()
    {
        return $this->comments->count();
    }

that works for me )