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We can not index categories of an AccommodationOffering (it's a Warehouse) to Solr.
A many-to-many relationship, called "supercategories" from AccommodationOffering to Category has been created in the same way that Product has.

The aggregate information exists at the database level and can be retrieved by spring through the groovy queries from HAC. You can also see the information from the HMC and it is well associated, however when consulting it from the provider the data always arrives empty. So we do not know if there is an interceptor that is affecting this field that causes you to always return the empty value, which is why you can not add categories to Solr.

As it is not a Product, the DefaultCategorySource class has been extended, where the getDirectSuperCategories () method is as follows according to our needs:

protected Set getDirectSuperCategories (final Set products)

final Set categories = new HashSet ();

 for (final AccommodationOfferingModel product: products)
 
 // This code snippet is originally used but returns empty
 / * final Collection <CategoryModel> directCategories = getModelService ()
 .getAttributeValue (product, getCategoriesQualifier ()); * /

 // Attempt to bring the complete object but the supercategories attribute is still empty

 final AccommodationOfferingModel auxAccom = modelService.get (product.getPk ());
 final Collection <CategoryModel> directCategories = auxAccom.getSupercategories ();
 if (directCategories! = null &&! directCategories.isEmpty ())
 
 categories.addAll (directCategories);
 
 


 return categories;

This method is invoked when indexing with Solr, this is where we can not retrieve the categories to index them to Solr.