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

It seems a workaround, but it works. You have to add a join overriding createQuery() method, than assign a default sortBy overriding $datagridValues:

<?php
use Sonata\DoctrineORMAdminBundle\Datagrid\ProxyQuery;

class ExpenseAdmin extends Admin
{
    protected $datagridValues = array(
        '_page'       => 1,
        '_sort_order' => 'ASC', // sort direction
        '_sort_by' => 'c.name' // field name
    );

    /**
     * @return \Sonata\AdminBundle\Datagrid\ProxyQueryInterface
     */
    public function createQuery($context = 'list')
    {
        $query = parent::createQuery($context);

        return new ProxyQuery($query
            ->join(sprintf('%s.category', $query->getRootAlias()), 'c'));
    }
}

Answer 2

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();
}