Weighted values, not keys?

[tommedema]

We're looking to use Fuse to implement an email autocomplete component. A typical input might look like this:

  const data = [
    { email: 'frequent@host.tld', weight: 1 },
    { email: 'frequent@not.tld', weight: 0.5 },
  ]

Here frequent@host.tld has a higher weight because this email address is used more frequently than frequent@not.tld. If the user now searched for "frequent", the entry with the higher weight should appear above the entry with the lower weight.

Since the keys are the same, this is a weighted search on a value basis, rather than on a key basis. How would we achieve this with Fuse?

[krisk]

Looks like you’re looking for value-based boosting at query time. Since this isn’t supported out-of-the box (and I don’t have plans to include it), you could work around the issue by:

1. Do the standard search
2. Once you have all your results, for every returned item:
   • Get the weight for that value
   • Update the score to take into account the weight.
     • i.e., you could do score = score * ((1 - weight) || 1)
3. Resort the list based on the new score

(Note: make sure you set includeMatches to true, that way if you have multiple matched entries per item, you’ll know exactly which key/value was matched)