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Introduce the faceted fields method to retrieve those that needs faceting

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Kerollmops 2021-06-01 12:20:29 +02:00
parent 2a3f9b32ff
commit ff440c1d9d
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1 changed files with 22 additions and 1 deletions
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23
milli/src/index.rs
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@ -357,8 +357,29 @@ impl Index {
Ok(filterable_fields) Ok(filterable_fields)
} }
/* faceted documents ids */
/// Returns the faceted fields names.
///
/// Faceted fields are the union of all the filterable, distinct, and Asc/Desc fields.
pub fn faceted_fields(&self, rtxn: &RoTxn) -> heed::Result<HashSet<String>> { pub fn faceted_fields(&self, rtxn: &RoTxn) -> heed::Result<HashSet<String>> {
Ok(self.main.get::<_, Str, SerdeJson<_>>(rtxn, FACETED_FIELDS_KEY)?.unwrap_or_default()) let filterable_fields = self.filterable_fields(rtxn)?;
let distinct_field = self.distinct_attribute(rtxn)?;
let asc_desc_fields = self.criteria(rtxn)?
.into_iter()
.filter_map(|criterion| match criterion {
Criterion::Asc(field) | Criterion::Desc(field) => Some(field),
_otherwise => None,
});
let mut faceted_fields = filterable_fields;
faceted_fields.extend(asc_desc_fields);
if let Some(field) = distinct_field {
faceted_fields.insert(field.to_owned());
}
Ok(faceted_fields)
} }
/// Same as `faceted_fields`, but returns ids instead. /// Same as `faceted_fields`, but returns ids instead.