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Merge pull request #206 from meilisearch/get-documents-ids

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Introduce the DocumentsIds iterator
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Clément Renault 2019-10-10 10:54:21 +02:00 committed by GitHub
commit da0168bd82
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1 changed files with 37 additions and 0 deletions
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37
meilidb-core/src/store/documents_fields.rs
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@ -100,6 +100,15 @@ impl DocumentsFields {
let iter = self.documents_fields.iter_from(reader, document_id_bytes)?;
Ok(DocumentFieldsIter { document_id, iter })
}
pub fn documents_ids<'r, T: rkv::Readable>(
&self,
reader: &'r T,
) -> Result<DocumentsIdsIter<'r>, rkv::StoreError>
{
let iter = self.documents_fields.iter_start(reader)?;
Ok(DocumentsIdsIter { last_seen_id: None, iter })
}
}
pub struct DocumentFieldsIter<'r> {
@ -125,3 +134,31 @@ impl<'r> Iterator for DocumentFieldsIter<'r> {
}
}
}
pub struct DocumentsIdsIter<'r> {
last_seen_id: Option<DocumentId>,
iter: rkv::store::single::Iter<'r>,
}
impl<'r> Iterator for DocumentsIdsIter<'r> {
type Item = Result<DocumentId, rkv::StoreError>;
fn next(&mut self) -> Option<Self::Item> {
for result in self.iter.next() {
match result {
Ok((key, Some(rkv::Value::Blob(bytes)))) => {
let array = TryFrom::try_from(key).unwrap();
let (document_id, attr) = document_attribute_from_key(array);
if Some(document_id) != self.last_seen_id {
self.last_seen_id = Some(document_id);
return Some(Ok(document_id))
}
},
Ok((key, data)) => panic!("{:?}, {:?}", key, data),
Err(e) => return Some(Err(e)),
}
}
None
}
}