VenueDepartmentRecipeBulkDuplicateRowType.php

            case ('admin' === $requestScopeDiscriminator) :

                // Set default options for form control
                $options = array(
                    'label'           => 'Department',
                    'class'           => 'MlfAppBundle:VenueDepartment',
                    'multiple'        => true,
                    'endpointIndex'   => array(
                        'mlf_back_end_venueDepartment_index',
                        array(
                            '_format' => 'json'
                        )
                    ),
                    'attr'            => array(
                        'controlInput' => array(
                            'class' => 'ControlInput--select2EntitySelect',
                            'data-placeholder' => 'Select a venue department'
                        ),
                        'control'      => array('class' => 'Control--ghost'),
                        'th'           => array('style' => 'width:150px;'),
                        'td'           => array('class' => 'u-pad-none')
                    )
                );

                
                // This is where shit gets real!
                // If $venueDepartment is false then we shouldn't try to load anything hence returning a blank array for choices
                if(false === $venueDepartmentIds) {
                    $options['choices'] = array();
                // Else we need a query builder to filter the options based on the selected entities
                } else {
                    $options['query_builder'] = function (VenueDepartmentRepository $repo) use ($venueDepartmentIds) {
                        $qb = $repo->createFindByQueryBuilder(array(
                                'id' => $venueDepartmentIds
                            ));
                        return $qb;
                    };
                }
                
                // Create the form field
                $form->add(
                    'venueDepartments',
                    'select2EntitySearch',
                    $options
                );

                break;