Prioritize certain records over others with Autocomplete

MongoDB Atlas Atlas Search
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1

I am using the atlas search autocomplete feature for a collection of Songs in MongoDb.

If I query the song “Santa Claus Is Comin’ To Town” using autocomplete, I get back many versions of this song by many different artists.

A Song in my case has a "isPopular": "true" attribute, if the song is a popular version of the song.

I am looking to prioritize documents that have "isPopular": "true" so that they are returned first in the autocomplete result list. The way I currently have this search configured does not pay attention to this isPopular attribute. How might I boost these popular records?

Here is the index that I defined in Atlas Search:

{
  "mappings": {
    "dynamic": false,
    "fields": {
      "name": [
        {
          "foldDiacritics": false,
          "maxGrams": 7,
          "minGrams": 3,
          "tokenization": "edgeGram",
          "type": "autocomplete"
        }
      ]
    }
  }
}

And here is the query I am using to fetch the results using a compound should query factoring the isPopular.

let results = await Song.aggregate([
      {
        $search: {
          index: "song_autocomplete",
          compound: {
            must: [{
              autocomplete: {
                query: req.query.name,
                path: "name",
                tokenOrder: "sequential",
              }
            }],
            should: [{
              text: {
                query: "true",
                path: "isPopular"
              }
            }],
          }
        },
      },
      {
        $project: {
          name: 1,
          _id: 1,
        },
      },
      {
        $limit: 10,
      },
    ]);

Would appreciate any workaround here so that results that have isPopular show up as the first results.

2

Hi @Michael_Murphy, welcome to the MongodB community! You should be able to achieve this by customizing the score of results - try playing around with the boost or constant options. This should allow you to increase the score of documents which satisfy "isPopular": "true" so that they get returned at the top of the results list.

Let me know if this helps!

3

So I’ve been playing around with score priror, but just did so again and it does not seem to be effecting the results or their scores when I $project the scores with the result. The value is the same with or without the score boost or constant for records where isPopular: "true"

$search: {
          index: "song_autocomplete",
          compound: {
            must: [{
              autocomplete: {
                query: req.query.name,
                path: "name",
                tokenOrder: "sequential",
              }
            }],
            should: [{
              text: {
                query: "true",
                path: "isPopular",
                score: {
                  // "constant": { value: 5 }
                  "boost": { value: 5 }
                }
              }
            }],
          }
        },

Am I configuring this incorrectly?