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” page for products, I need to sort by the category name (alphabetically) that each product is associated with.

Setting the default field to sort by is easy if the field is on the entity itself (see Sonata admin bundle order for how to do this). But I cannot figure out how to sort by a field in a related table.

Any help is appreciated.

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'));
    }
}