filter_by with facet string data is returning empty

[melovv]

Hi.

I'm experimenting typesense but I'm getting an unexpected behaviour.

Best,

Vinícius.

Description

Using the companies example, a query with filter_by country is returning empty if the field is facet. Is this the expected behavior?

Steps to reproduce

Companies example taken from here: https://typesense.org/0.9.2/api/

Query using filter_by:
localhost:8108/collections/companies/documents/search?q=stark&query_by=company_name&filter_by=country:USA

Expected Behavior

{"facet_counts":[1],"found":1,"hits":[{"document":{"company_name":"Stark Industries","country":"USA","id":"124","num_employees":5215},"highlights":[{"field":"company_name","snippet":"Stark Industries"}],"seq_id":0}],"page":1,"search_time_ms":0}

Actual Behavior

{"found":0,"hits":[],"page":1,"search_time_ms":0}

Metadata

Typsense Version: 0.92

OS: macOS 10.12.6

[kishorenc]

@melovv

Thank you for creating this issue.

Faceted fields are indexed verbatim without any "normalization". So, the value USA is indexed as it is.

However, when a filter_by is performed on a string field, Typesense "normalizes" the string before searching for it. So, Typesense looks for usa (the normalized version of USA) and is not able to find the document. I'm going to call this a bug. Ideally, when a facet field is filtered upon, we should search verbatim instead of normalizing the filter_by value.

For now, as a work-around, you can create another string field that has a facet: false and filter on that.