Expose a function to control the sort order

[peterbe]

What I would like is to control the sort order. I'm guessing, internally, that Flexsearch has an algorithm for determining which matched document came before another. If I can just get in there an affect the sort for very specific business logic. Something like this maybe:

index.search(query, {
  sort: (a, b) => {
    if (someReason(a)) { return 1 }
    if (someOtherReason(b)) { return -1 }
    return 0
  }
})

Ideally, the sort callback would get the document and each documents match score as determined what internals of Flexsearch (e.g. BM25). For example, I could manually boost the score on docs that should be prioritized.

[peterbe]

Another solution would be to expose a function that allows me to control the score of each document. I imagine, you have 1,000 documents and of them 100 have greater-than-zero matching so now I could manipulate the score of the 100 matched. E.g.

index.search(query, {
  adjustScore: (document, score) => {
    if (document.key === 'special')  return score * 2
    if (document.key === 'blaae') return score / 2
    return score
  }
})

[peterbe]

@ts-thomas Perhaps you can help with a temporary solution. Is there any way I can find out the internal score of my search results. Because if I can have the internal scores, I can retroactively recompute them and re-sort.

[corey34]

@peterbe did you ever find out how to do this?

[ts-thomas]

There is no linear search, the index contains of multiple blocks which will concatenated during search. The best option is to apply custom order on the result. Adding the score value visible to the result is already on my feature request list.

[peterbe]

Nope. No progress. And I have up.

On Wed, Apr 13, 2022 at 6:03 PM corey34 @.***> wrote:

@peterbe https://github.com/peterbe did you ever find out how to do this?

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