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Introduce displayed fields methods on the index

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Clément Renault 2020-11-02 11:45:16 +01:00
parent 4fded5bd0e
commit 8f56753a2f
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1 changed files with 19 additions and 0 deletions
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19
src/index.rs
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@ -14,6 +14,7 @@ use crate::{
BoRoaringBitmapCodec, CboRoaringBitmapCodec,
};
pub const DISPLAYED_FIELDS_KEY: &str = "displayed-fields";
pub const DOCUMENTS_IDS_KEY: &str = "documents-ids";
pub const FIELDS_IDS_MAP_KEY: &str = "fields-ids-map";
pub const PRIMARY_KEY_KEY: &str = "primary-key";
@ -126,6 +127,24 @@ impl Index {
Ok(self.main.get::<_, Str, SerdeJson<FieldsIdsMap>>(rtxn, FIELDS_IDS_MAP_KEY)?.unwrap_or_default())
}
/// Writes the fields ids that must be displayed in the defined order.
/// There must be not be any duplicate field id.
pub fn put_displayed_fields(&self, wtxn: &mut heed::RwTxn, fields: &[u8]) -> heed::Result<()> {
self.main.put::<_, Str, ByteSlice>(wtxn, DISPLAYED_FIELDS_KEY, fields)
}
/// Deletes the displayed fields ids, this will make the engine to display
/// all the documents attributes in the order of the `FieldsIdsMap`.
pub fn delete_displayed_fields(&self, wtxn: &mut heed::RwTxn) -> heed::Result<bool> {
self.main.delete::<_, Str>(wtxn, DISPLAYED_FIELDS_KEY)
}
/// Returns the displayed fields ids in the order they must be returned. If it returns
/// `None` it means that all the attributes are displayed in the order of the `FieldsIdsMap`.
pub fn displayed_fields<'t>(&self, rtxn: &'t heed::RoTxn) -> heed::Result<Option<&'t [u8]>> {
self.main.get::<_, Str, ByteSlice>(rtxn, DISPLAYED_FIELDS_KEY)
}
/// Writes the FST which is the words dictionnary of the engine.
pub fn put_words_fst<A: AsRef<[u8]>>(&self, wtxn: &mut heed::RwTxn, fst: &fst::Set<A>) -> heed::Result<()> {
self.main.put::<_, Str, ByteSlice>(wtxn, WORDS_FST_KEY, fst.as_fst().as_bytes())