Symfony\Bridge\Doctrine\Form\ChoiceList\EntityChoiceList::loadEntities PHP Метод

    private function loadEntities($entities, $group = null)
    {
        foreach ($entities as $key => $entity) {
            if (is_array($entity)) {
                // Entities are in named groups
                $this->loadEntities($entity, $key);
                continue;
            }

            if ($this->propertyPath) {
                // If the property option was given, use it
                $value = $this->propertyPath->getValue($entity);
            } else {
                // Otherwise expect a __toString() method in the entity
                $value = (string)$entity;
            }

            if (count($this->identifier) > 1) {
                // When the identifier consists of multiple field, use
                // naturally ordered keys to refer to the choices
                $id = $key;
            } else {
                // When the identifier is a single field, index choices by
                // entity ID for performance reasons
                $id = current($this->getIdentifierValues($entity));
            }

            if (null === $group) {
                // Flat list of choices
                $this->choices[$id] = $value;
            } else {
                // Nested choices
                $this->choices[$group][$id] = $value;
            }

            $this->entities[$id] = $entity;
        }
    }