Get the names of a dynamic product group with a subscriber in Shopware 6.1 - shopware

Question

how can I get the names of the dynamic product groups of a product?
Especially the names of that groups. The names are in the table 'product_stream_translation'.
I have a subscriber and have added this Criteria. When I am doing it like this:
$criteria->addFilter(new EqualsFilter('id', $id));
$criteria->addAssociation('streams');
$dynamicProductGroups = $this->productRepository->search($criteria, $context)->getEntities();
I just got back an empty streamEntity.
#streams: Shopware\Core\Content\ProductStream\ProductStreamCollection {#11805 ▼
#elements: []
#extensions: []
}
When I am doing it like this:
$criteria->addFilter(new EqualsFilter('productId', $id));
$dynamicProductGroups = $this->productStreamMappingRepository->searchIds($criteria, $context);
I just got back the Id I put in:
product_stream_mapping
I wonder how I will get the name of the dynamic product group.
With a query I can get all the assign 'product_stream_id's from the table 'product_stream_mapping' like this:
SELECT * FROM product_stream_mapping WHERE product_id =0x000000000000000000123b313030524b
And then get the associated name of the dynamic product group. With is like this:
SELECT psm.product_id, psm.product_stream_id, p.product_number, pst.name
FROM product_stream_mapping psm
JOIN product_stream_translation pst ON pst.product_stream_id = psm.product_stream_id
JOIN product p ON p.id = psm.product_id
WHERE psm.product_id = 0x000000000000000000123b313030524b
How can I get it in the Subscriber?
Do I have to use criteria or do I have to user a repository?

Answer 1

This line is wrong:
$dynamicProductGroups = $this->productRepository->search($criteria, $context)->getEntities();
It won't return dynamic product groups but a product collection. To get a product stream collection (dynamic product groups) replace it with:
/** #var ProductEntity $product */
$product = $this->productRepository->search($criteria, $context)->first();
$dynamicProductGroups = $product->getStreams();
Then you can read the names of the streams with:
$names = array_values(
$dynamicProductGroups->map(fn (ProductStreamEntity $productStream) => $productStream->getName())
);