$for = fuzzy $or operator

[fusionbeam]

Description

A clear and concise description of the problem or missing capability..

There is a need to perform a search where all query terms occurrences improve the overall matching score. I.e when searching for a product by a set of terms it is quite intuitive that the more relevant product is the one with the most terms occurring in its title or product description or wherever.

Describe the solution you'd like

A fuzzy $or operator that is not Boolean logic but a fuzzy one that is additive (cumulative). That is each occurrence of query term increases the overall score of the document in the search result.

Describe alternatives you've considered

$and operator is too restrictive, it requires all terms to occur $or operator is ordering results in accordance with the number of occurrences

[fusionbeam]

This is the code and it shows that multiple occurrences are not recorded and don't improve the score. Matches are reset before iterating the next query term.

// ORs
    for (let i = 0, qLen = query.length; i < qLen; i += 1) {
      const searchers = query[i];

      // Reset indices
      allIndices.length = 0;
      numMatches = 0;

      // ANDs
      for (let j = 0, pLen = searchers.length; j < pLen; j += 1) {
        const searcher = searchers[j];
        const { isMatch, indices, score } = searcher.search(text);

        if (isMatch) {
          numMatches += 1;
          totalScore += score;
          if (includeMatches) {
            const type = searcher.constructor.type;
            if (MultiMatchSet.has(type)) {
              allIndices = [...allIndices, ...indices];
            } else {
              allIndices.push(indices);
            }
          }
        } else {
          totalScore = 0;
          numMatches = 0;
          allIndices.length = 0;
          break
        }
      }

      // OR condition, so if TRUE, return
      if (numMatches) {
        let result = {
          isMatch: true,
          score: totalScore / numMatches
        };

        if (includeMatches) {
          result.indices = allIndices;
        }

        return result
      }
    }

[fusionbeam]

for product searches being able to get better score for multiple occurrences is very important.

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