Bolt\Storage\Collection\Relations::setFromPost PHP Method

    public function setFromPost(array $formValues, Entity\Content $entity)
    {
        if (isset($formValues['relation'])) {
            $flatVals = $formValues['relation'];
        } else {
            $flatVals = $formValues;
        }
        foreach ($flatVals as $field => $values) {
            if (!is_array($values)) {
                continue;
            }
            foreach ($values as $val) {
                if (!$val) {
                    continue;
                }
                $newEntity = new Entity\Relations(['from_contenttype' => (string) $entity->getContenttype(), 'from_id' => $entity->getId(), 'to_contenttype' => $field, 'to_id' => $val]);
                $this->add($newEntity);
            }
        }
    }