query.php

<?php
// "Simple" query (e.g. no logical operations)
// is_class( article, blog_post ) AND parent_location_id( 4 ) AND attr_enabled = true AND attr_publishing_date = <DATE>
$queryBuilder
    ->contentTypeIdentifier()->in( 'article', 'blog_post' )
    ->parentLocationId()->eq( 2 )
    ->checkboxField( 'enabled' )->isFalse()
    ->dateField( 'publishing_date' )->before( 'last monday' )
    ->sortBy()
        ->datePublished()->descending()
        ->contentName()->ascending();

// "Complex" query (e.g. with logical operations)
// ( ( is_class( article, blog ) AND parent_location_id( 2 ) ) OR attr_can_syndicate == true ) AND published > 10 days
$queryBuilder
    ->or(
        $queryBuilder->expr()->and(
            $queryBuilder->expr()
            ->contentTypeIdentifier()->in( 'article', 'blog' )
            ->parentLocationId()->eq( 2 )
        )
        ->checkboxField( 'can_syndicate' )->isTrue()
    )
    ->wasCreated()->before( '10 days ago' )
    ->sortBy()->datePublished()->ascending();