Azure search - custom function for result boosting - azure

Question

I'm trying to move "complex" function to Azure Search. This function calculates score per each result element base on filter data (from search query) and data stored in result element. Score is use for reasult boosting. Base on my research Azure Search provides result boosting, but it's too simple for mine requirement.
Example function:
//filterElementsIds - ids taken from search query filter
public double Score(IEnumerable<string> filterElementsIds, ResultElement element)
{
double score = 0;
foreach(var elem in element.ScoreForFilters)
if (filterElementsIds.Any(x => x == elem.Key))
score += elem.Value * 1.5;
return score;
}
Currently, I'm iterating through each result returned by Azure Search - calculating score and sorting elements inside my application.
Is it possible to implement such function in Azure Search to improve process of boosting results?

Answer 1

I'm not sure I fully understand your question, but it appears like you are trying to boost the score of certain document if their key is equal to any of the IDs in your collection of "filterElements". If that's so, you could use the lucene query language to craft a query which does that:
https://learn.microsoft.com/en-us/azure/search/search-query-lucene-examples
You could do a search that looks like this
OriginalSearchTerm OR (OriginalSearchTerm AND key:("filterID1" OR "filterID2" OR "filterID3"))
That way, documents that match both the original search term as well as having one of the filter ID as part of the "key" field will match higher than documents that only match the original search term. You can also term boosting to give a specific boost to the key field in this case
If that's so, could you use "term boosting" to achieve this?
https://learn.microsoft.com/en-us/azure/search/search-query-lucene-examples#example-5-term-boosting
OriginalSearchTerm OR (OriginalSearchTerm AND key:("filterID1" OR "filterID2" OR "filterID3")^2)