range queries on numbers

I know it’s out of the scope but would be really happy to have it in lunr 😃

var index = lunr(function(){
    this.field('price');
    this.ref('id');
});

index.add({id: "1",price: "2"});
index.add({id: "2",price: "11"});
index.add({id: "3",price: "27"});

var results = index.numericRangeSearch("[10:30]");
// results = {id : 2 , id : 3}

Lucene used to transform numbers to sortable strings to achieve such kinds of queries : https://github.com/apache/lucene-solr/blob/master/lucene/core/src/java/org/apache/lucene/util/NumericUtils.java

And some times before, the workaround was to use padding : Before

2
11
27

After

002
011
027

If you don’t want to include this feature in lunr, any help would be really appreciated.

Thanks a lot for this wonderful project anyway.

Manu

[olivernn]

So, first of all, this is almost definitely not going to make it into the current version of lunr, it would involve too much change, specifically around understanding the search term, but probably in other places too.

The next version of lunr already has some smarts around parsing search queries, so there is already the pieces in place for understanding [10:30] as meaning any document with a number between 10 and 30.

I need to do a bit more background reading, as well as consider how text ranges such as [aa:ab] would work, but it might be something that could end up making it into lunr.

I’ll keep this issue open for now, just to remind me to think about it. I can’t promise that I’ll end up with a solution any time soon though.

[olivernn]

@fauno not yet, mostly because I haven’t prioritised it.