Extract final value from nested field collection

Question

I have a content type with a field collection. This field collection has, as fields, other field collections. It works well, it groups the content for a node perfectly, but when trying to extract the data programmatically, I cannot access the values introduced. How would be the method. I tried with this piece of code, but it throws an error. Also not sure if adequate to my case (nested field collections):

$node = node_load($node->nid);
$node_wrapper = entity_metadata_wrapper('node', $node);

foreach ($node_wrapper->field_rich_text_group as $field_collection_wrapper) {
            $field_collection = $field_collection_wrapper->value();
                print_r($field_collection);
}

Answer 1

Try this :

$node = node_load($node->nid);
$node_wrapper = entity_metadata_wrapper('node', $node);

foreach ($node_wrapper->field_rich_text_group->value() as $value) {
  $field_collection_wrapper = entity_metadata_wrapper('field_collection_item', $value);
  $field_collection_myfield = $field_collection_wrapper->field_myfield->value();
  print_r($field_collection_myfield);
}

Field Collection is an entity, so if you want to access its field you have to pass the field collection in entity_metadata_wrapper. Then you can access the value of your fields in field collection like you do with your $node_wrapper

Answer 2

I have managed to get the value by direct access.

$node = node_load($node->nid);
$node_wrapper = entity_metadata_wrapper('node', $node);
echo $node_wrapper->field_rich_text_group->field_meta_datos->field_meta_title->value();

I guess that the foreach would be needed if I have multivalued data. Please someone explains to me why this solution works and pbonnefoi does not print anything and throws error. Adapting from his code,

$node = node_load($node->nid);
$node_wrapper = entity_metadata_wrapper('node', $node);
foreach ($node_wrapper->field_rich_text_group->value() as $value) {

$field_collection_wrapper = entity_metadata_wrapper('field_collection_item', $value);

 $field_collection_myfield = entity_metadata_wrapper("field_collection_item", $field_collection_wrapper->field_meta_datos->value());

print $field_collection_myfield->field_meta_title->value();

Print OK but throws this error, probably because in the loop there is something it does not locate:

`// EntityMetadataWrapperException: Unknown data property field_meta_datos. en EntityStructureWrapper->getPropertyInfo() (line 335 of /home/public_html/sites/all/modules/entity/includes/entity.wrapper.inc).`