Extending the Extended Field Rendering

Before extending field rendering on the view page, fire the oro.entity_extend_event.before_value_render event. Using this event, you can customize field rendering.

As example of an event listener registration:

oro_entity_extend.listener.extend_field_value_render:
    class: Oro\Bundle\EntityExtendBundle\EventListener\ExtendFieldValueRenderListener
    arguments:
        - '@oro_entity_config.config_manager'
        - '@router'
        - '@oro_entity_extend.extend.field_type_helper'
        - '@doctrine.orm.entity_manager'
    tags:
        - { name: kernel.event_listener, event: oro.entity_extend_event.before_value_render, method: beforeValueRender }

Each event listener decides on how to display the field value. To change the field view value, it uses $event->setFieldViewValue($viewData);.

Example:

$underlyingFieldType = $this->fieldTypeHelper->getUnderlyingType($type);
    if ($value && $underlyingFieldType == 'manyToOne') {
        $viewData = $this->getValueForManyToOne(
            $value,
            $this->extendProvider->getConfigById($event->getFieldConfigId())
        );

        $event->setFieldViewValue($viewData);
    }

In this code, we should:

• check if the value is not null, and the field type is “manyToOne”.

• calculate the field view value and set it by calling $event->setFieldViewValue($viewData);

Variable $viewData can have a simple string or an array ['link' => 'example.com', 'title' => 'some text representation']. In case of a string, it will be formatted in a twig template automatically based on the field type. In case of an array, we show a field with text equal to 'title'. Title will also be escaped. If the 'link' option exists, we show the field as a link with href that equals the 'link' option value.