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https://github.com/meilisearch/MeiliSearch
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Merge #628
628: Make sure that long words are ignored r=ManyTheFish a=Kerollmops This PR is related to https://github.com/meilisearch/meilisearch/issues/2743 and is fixing it. Co-authored-by: Kerollmops <clement@meilisearch.com>
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commit
2907928d93
@ -7,7 +7,9 @@ use charabia::{SeparatorKind, Token, TokenKind, TokenizerBuilder};
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use roaring::RoaringBitmap;
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use serde_json::Value;
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use super::helpers::{concat_u32s_array, create_sorter, sorter_into_reader, GrenadParameters};
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use super::helpers::{
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concat_u32s_array, create_sorter, sorter_into_reader, GrenadParameters, MAX_WORD_LENGTH,
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};
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use crate::error::{InternalError, SerializationError};
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use crate::{absolute_from_relative_position, FieldId, Result, MAX_POSITION_PER_ATTRIBUTE};
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@ -68,7 +70,7 @@ pub fn extract_docid_word_positions<R: io::Read + io::Seek>(
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for (index, token) in tokens {
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let token = token.lemma().trim();
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if !token.is_empty() {
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if !token.is_empty() && token.len() <= MAX_WORD_LENGTH {
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key_buffer.truncate(mem::size_of::<u32>());
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key_buffer.extend_from_slice(token.as_bytes());
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@ -18,8 +18,11 @@ pub use merge_functions::{
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roaring_bitmap_from_u32s_array, serialize_roaring_bitmap, MergeFn,
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};
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/// The maximum length a word can be
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pub const MAX_WORD_LENGTH: usize = 250;
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pub fn valid_lmdb_key(key: impl AsRef<[u8]>) -> bool {
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key.as_ref().len() <= 511 && !key.as_ref().is_empty()
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key.as_ref().len() <= MAX_WORD_LENGTH * 2 && !key.as_ref().is_empty()
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}
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/// Divides one slice into two at an index, returns `None` if mid is out of bounds.
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@ -1741,4 +1741,22 @@ mod tests {
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index.add_documents(doc3).unwrap_err();
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index.add_documents(doc4).unwrap_err();
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}
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#[test]
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fn long_words_must_be_skipped() {
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let index = TempIndex::new();
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// this is obviousy too long
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let long_word = "lol".repeat(1000);
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let doc1 = documents! {[{
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"id": "1",
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"title": long_word.clone(),
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}]};
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index.add_documents(doc1).unwrap();
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let rtxn = index.read_txn().unwrap();
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let words_fst = index.words_fst(&rtxn).unwrap();
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assert!(!words_fst.contains(&long_word));
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}
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}
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