Give flagged products in search API a higher search score? I have a product catalog running on Search API and Search API SOLR Search. Now I was hoping that when a customer flags a product (with the flag module), there would be a way to boost the search score of that particular product. 
So that when it is flagged as favorite it will float to the top, but only for that specific user. 

How to alter Search API search scores so flagged items will have a higher score?
You could have a view that shows flagged nodes by user and a view attachment for the index filtering out nodes that the user has flagged.