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Merge pull request #160 from meilisearch/synonyms

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Support all types of synonyms
This commit is contained in:
Clément Renault 2019-06-26 14:59:45 +02:00 committed by GitHub
commit 1b0fd2e0ba
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GPG Key ID: 4AEE18F83AFDEB23
14 changed files with 1068 additions and 42 deletions
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4
meilidb-core/Cargo.toml
View File

@ -6,6 +6,7 @@ edition = "2018"
[dependencies]
byteorder = "1.3.1"
deunicode = "1.0.0"
hashbrown = "0.2.2"
lazy_static = "1.2.0"
log = "0.4.6"
@ -25,6 +26,9 @@ git = "https://github.com/Kerollmops/levenshtein-automata.git"
branch = "arc-byte-slice"
features = ["fst_automaton"]
[dev-dependencies]
assert_matches = "1.3"
[features]
i128 = ["byteorder/i128"]
nightly = ["hashbrown/nightly", "slice-group-by/nightly"]

2
meilidb-core/src/criterion/mod.rs
View File

@ -113,7 +113,7 @@ impl<'a> Default for Criteria<'a> {
}
}
impl<'a> AsRef<[Box<Criterion + 'a>]> for Criteria<'a> {
impl<'a> AsRef<[Box<dyn Criterion + 'a>]> for Criteria<'a> {
fn as_ref(&self) -> &[Box<dyn Criterion + 'a>] {
&self.inner
}

13
meilidb-core/src/lib.rs
View File

@ -1,3 +1,6 @@
#[cfg(test)]
#[macro_use] extern crate assert_matches;
mod automaton;
mod distinct_map;
mod query_builder;
@ -7,12 +10,12 @@ pub mod criterion;
use std::fmt;
use std::sync::Arc;
use rayon::slice::ParallelSliceMut;
use sdset::SetBuf;
use serde::{Serialize, Deserialize};
use slice_group_by::GroupBy;
use zerocopy::{AsBytes, FromBytes};
pub use self::query_builder::{QueryBuilder, DistinctQueryBuilder};
pub use self::query_builder::{QueryBuilder, DistinctQueryBuilder, normalize_str};
pub use self::store::Store;
/// Represent an internally generated document unique identifier.
@ -226,12 +229,10 @@ impl fmt::Debug for RawDocument {
}
}
pub fn raw_documents_from_matches(mut matches: Vec<(DocumentId, Match)>) -> Vec<RawDocument> {
let mut docs_ranges = Vec::<(DocumentId, Range)>::new();
pub fn raw_documents_from_matches(matches: SetBuf<(DocumentId, Match)>) -> Vec<RawDocument> {
let mut docs_ranges = Vec::<(_, Range)>::new();
let mut matches2 = Matches::with_capacity(matches.len());
matches.par_sort_unstable();
for group in matches.linear_group_by(|(a, _), (b, _)| a == b) {
let id = group[0].0;
let start = docs_ranges.last().map(|(_, r)| r.end).unwrap_or(0);

764
meilidb-core/src/query_builder.rs
View File

@ -4,35 +4,111 @@ use std::rc::Rc;
use std::time::Instant;
use std::{cmp, mem};
use rayon::slice::ParallelSliceMut;
use slice_group_by::GroupByMut;
use meilidb_tokenizer::{is_cjk, split_query_string};
use fst::{Streamer, IntoStreamer};
use hashbrown::{HashMap, HashSet};
use fst::Streamer;
use log::info;
use meilidb_tokenizer::{is_cjk, split_query_string};
use rayon::slice::ParallelSliceMut;
use sdset::SetBuf;
use slice_group_by::GroupByMut;
use crate::automaton::{self, DfaExt, AutomatonExt};
use crate::automaton::{DfaExt, AutomatonExt, build_dfa, build_prefix_dfa};
use crate::distinct_map::{DistinctMap, BufferedDistinctMap};
use crate::criterion::Criteria;
use crate::raw_documents_from_matches;
use crate::{Match, DocumentId, Store, RawDocument, Document};
fn generate_automatons(query: &str) -> Vec<DfaExt> {
let has_end_whitespace = query.chars().last().map_or(false, char::is_whitespace);
let mut groups = split_query_string(query).map(str::to_lowercase).peekable();
let mut automatons = Vec::new();
const NGRAMS: usize = 3;
while let Some(word) = groups.next() {
let has_following_word = groups.peek().is_some();
let lev = if has_following_word || has_end_whitespace || word.chars().all(is_cjk) {
automaton::build_dfa(&word)
} else {
automaton::build_prefix_dfa(&word)
};
automatons.push(lev);
struct Automaton {
index: usize,
is_synonym: bool,
number_words: usize,
dfa: DfaExt,
}
impl Automaton {
fn synonym(index: usize, number_words: usize, dfa: DfaExt) -> Automaton {
Automaton { index, is_synonym: true, number_words, dfa }
}
automatons
fn original(index: usize, number_words: usize, dfa: DfaExt) -> Automaton {
Automaton { index, is_synonym: false, number_words, dfa }
}
}
pub fn normalize_str(string: &str) -> String {
let mut string = string.to_lowercase();
if !string.contains(is_cjk) {
string = deunicode::deunicode_with_tofu(&string, "");
}
string
}
fn generate_automatons<S: Store>(query: &str, store: &S) -> Result<Vec<Automaton>, S::Error> {
let has_end_whitespace = query.chars().last().map_or(false, char::is_whitespace);
let query_words: Vec<_> = split_query_string(query).map(str::to_lowercase).collect();
let mut automatons = Vec::new();
let synonyms = store.synonyms()?;
for n in 1..=NGRAMS {
let mut index = 0;
let mut ngrams = query_words.windows(n).peekable();
while let Some(ngram) = ngrams.next() {
let ngram_nb_words = ngram.len();
let ngram = ngram.join(" ");
let has_following_word = ngrams.peek().is_some();
let not_prefix_dfa = has_following_word || has_end_whitespace || ngram.chars().all(is_cjk);
let lev = {
let normalized = normalize_str(&ngram);
if not_prefix_dfa { build_dfa(&normalized) } else { build_prefix_dfa(&normalized) }
};
let mut stream = synonyms.search(&lev).into_stream();
while let Some(base) = stream.next() {
// only trigger alternatives when the last word has been typed
// i.e. "new " do not but "new yo" triggers alternatives to "new york"
let base = std::str::from_utf8(base).unwrap();
let base_nb_words = split_query_string(base).count();
if ngram_nb_words != base_nb_words { continue }
if let Some(synonyms) = store.alternatives_to(base.as_bytes())? {
let mut stream = synonyms.into_stream();
while let Some(synonyms) = stream.next() {
let synonyms = std::str::from_utf8(synonyms).unwrap();
let nb_synonym_words = split_query_string(synonyms).count();
for synonym in split_query_string(synonyms) {
let lev = build_dfa(synonym);
let automaton = Automaton::synonym(index, nb_synonym_words, lev);
automatons.push((automaton, synonym.to_owned()));
}
}
}
}
if n == 1 {
let lev = if not_prefix_dfa { build_dfa(&ngram) } else { build_prefix_dfa(&ngram) };
let automaton = Automaton::original(index, ngram_nb_words, lev);
automatons.push((automaton, ngram));
}
index += 1;
}
}
automatons.sort_unstable_by(|a, b| (a.0.index, &a.1).cmp(&(b.0.index, &b.1)));
automatons.dedup_by(|a, b| (a.0.index, &a.1) == (b.0.index, &b.1));
let automatons = automatons.into_iter().map(|(a, _)| a).collect();
Ok(automatons)
}
pub struct QueryBuilder<'c, S, FI = fn(DocumentId) -> bool> {
@ -61,7 +137,7 @@ impl<'c, S, FI> QueryBuilder<'c, S, FI>
store: self.store,
criteria: self.criteria,
searchable_attrs: self.searchable_attrs,
filter: Some(function)
filter: Some(function),
}
}
@ -82,13 +158,13 @@ impl<'c, S, FI> QueryBuilder<'c, S, FI>
where S: Store,
{
fn query_all(&self, query: &str) -> Result<Vec<RawDocument>, S::Error> {
let automatons = generate_automatons(query);
let automatons = generate_automatons(query, &self.store)?;
let words = self.store.words()?.as_fst();
let mut stream = {
let mut op_builder = fst::raw::OpBuilder::new();
for automaton in &automatons {
let stream = words.search(automaton);
for Automaton { dfa, .. } in &automatons {
let stream = words.search(dfa);
op_builder.push(stream);
}
op_builder.r#union()
@ -98,9 +174,9 @@ where S: Store,
while let Some((input, indexed_values)) = stream.next() {
for iv in indexed_values {
let automaton = &automatons[iv.index];
let distance = automaton.eval(input).to_u8();
let is_exact = distance == 0 && input.len() == automaton.query_len();
let Automaton { index, is_synonym, number_words, ref dfa } = automatons[iv.index];
let distance = dfa.eval(input).to_u8();
let is_exact = (is_synonym && number_words == 1) || (!is_synonym && distance == 0 && input.len() == dfa.query_len());
let doc_indexes = self.store.word_indexes(input)?;
let doc_indexes = match doc_indexes {
@ -111,8 +187,8 @@ where S: Store,
for di in doc_indexes.as_slice() {
if self.searchable_attrs.as_ref().map_or(true, |r| r.contains(&di.attribute)) {
let match_ = Match {
query_index: iv.index as u32,
distance,
query_index: index as u32,
distance: distance,
attribute: di.attribute,
word_index: di.word_index,
is_exact,
@ -125,8 +201,22 @@ where S: Store,
}
}
matches.par_sort_unstable();
for document_matches in matches.linear_group_by_mut(|(a, _), (b, _)| a == b) {
let mut offset = 0;
for query_indexes in document_matches.linear_group_by_mut(|(_, a), (_, b)| a.query_index == b.query_index) {
let word_index = query_indexes[0].1.word_index - offset as u16;
for (_, match_) in query_indexes.iter_mut() {
match_.word_index = word_index;
}
offset += query_indexes.len() - 1;
}
}
let total_matches = matches.len();
let raw_documents = raw_documents_from_matches(matches);
let padded_matches = SetBuf::from_dirty(matches);
let raw_documents = raw_documents_from_matches(padded_matches);
info!("{} total documents to classify", raw_documents.len());
info!("{} total matches to classify", total_matches);
@ -321,3 +411,621 @@ where S: Store,
Ok(out_documents)
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::{BTreeSet, HashMap};
use std::iter::FromIterator;
use sdset::SetBuf;
use fst::{Set, IntoStreamer};
use crate::DocIndex;
use crate::store::Store;
#[derive(Default)]
struct InMemorySetStore {
set: Set,
synonyms: Set,
indexes: HashMap<Vec<u8>, SetBuf<DocIndex>>,
alternatives: HashMap<Vec<u8>, Set>,
}
fn set_from_stream<'f, I, S>(stream: I) -> Set
where
I: for<'a> fst::IntoStreamer<'a, Into=S, Item=&'a [u8]>,
S: 'f + for<'a> fst::Streamer<'a, Item=&'a [u8]>,
{
let mut builder = fst::SetBuilder::memory();
builder.extend_stream(stream).unwrap();
builder.into_inner().and_then(Set::from_bytes).unwrap()
}
fn insert_key(set: &Set, key: &[u8]) -> Set {
let unique_key = {
let mut builder = fst::SetBuilder::memory();
builder.insert(key).unwrap();
builder.into_inner().and_then(Set::from_bytes).unwrap()
};
let union_ = set.op().add(unique_key.into_stream()).r#union();
set_from_stream(union_)
}
fn sdset_into_fstset(set: &sdset::Set<&str>) -> Set {
let mut builder = fst::SetBuilder::memory();
let set = SetBuf::from_dirty(set.into_iter().map(|s| normalize_str(s)).collect());
builder.extend_iter(set.into_iter()).unwrap();
builder.into_inner().and_then(Set::from_bytes).unwrap()
}
impl InMemorySetStore {
pub fn add_synonym(&mut self, word: &str, new: SetBuf<&str>) {
let word = word.to_lowercase();
let alternatives = self.alternatives.entry(word.as_bytes().to_vec()).or_default();
let new = sdset_into_fstset(&new);
*alternatives = set_from_stream(alternatives.op().add(new.into_stream()).r#union());
self.synonyms = insert_key(&self.synonyms, word.as_bytes());
}
}
impl<'a> FromIterator<(&'a str, &'a [DocIndex])> for InMemorySetStore {
fn from_iter<I: IntoIterator<Item=(&'a str, &'a [DocIndex])>>(iter: I) -> Self {
let mut tree = BTreeSet::new();
let mut map = HashMap::new();
for (word, indexes) in iter {
let word = word.to_lowercase().into_bytes();
tree.insert(word.clone());
map.entry(word).or_insert_with(Vec::new).extend_from_slice(indexes);
}
InMemorySetStore {
set: Set::from_iter(tree).unwrap(),
synonyms: Set::default(),
indexes: map.into_iter().map(|(k, v)| (k, SetBuf::from_dirty(v))).collect(),
alternatives: HashMap::new(),
}
}
}
impl Store for InMemorySetStore {
type Error = std::io::Error;
fn words(&self) -> Result<&Set, Self::Error> {
Ok(&self.set)
}
fn word_indexes(&self, word: &[u8]) -> Result<Option<SetBuf<DocIndex>>, Self::Error> {
Ok(self.indexes.get(word).cloned())
}
fn synonyms(&self) -> Result<&Set, Self::Error> {
Ok(&self.synonyms)
}
fn alternatives_to(&self, word: &[u8]) -> Result<Option<Set>, Self::Error> {
Ok(self.alternatives.get(word).map(|s| Set::from_bytes(s.as_fst().to_vec()).unwrap()))
}
}
const fn doc_index(document_id: u64, word_index: u16) -> DocIndex {
DocIndex {
document_id: DocumentId(document_id),
attribute: 0,
word_index,
char_index: 0,
char_length: 0,
}
}
const fn doc_char_index(document_id: u64, word_index: u16, char_index: u16) -> DocIndex {
DocIndex {
document_id: DocumentId(document_id),
attribute: 0,
word_index,
char_index,
char_length: 0,
}
}
#[test]
fn simple_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("hello", &[doc_index(0, 0)][..]),
]);
store.add_synonym("bonjour", SetBuf::from_dirty(vec!["hello"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("hello", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("bonjour", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), None);
}
#[test]
fn prefix_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("hello", &[doc_index(0, 0)][..]),
]);
store.add_synonym("bonjour", SetBuf::from_dirty(vec!["hello"]));
store.add_synonym("salut", SetBuf::from_dirty(vec!["hello"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("sal", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("bonj", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("sal blabla", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("bonj blabla", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), None);
}
#[test]
fn levenshtein_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("hello", &[doc_index(0, 0)][..]),
]);
store.add_synonym("salutation", SetBuf::from_dirty(vec!["hello"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("salutution", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("saluttion", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), None);
}
#[test]
fn harder_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("hello", &[doc_index(0, 0)][..]),
("bonjour", &[doc_index(1, 3)]),
("salut", &[doc_index(2, 5)]),
]);
store.add_synonym("hello", SetBuf::from_dirty(vec!["bonjour", "salut"]));
store.add_synonym("bonjour", SetBuf::from_dirty(vec!["hello", "salut"]));
store.add_synonym("salut", SetBuf::from_dirty(vec!["hello", "bonjour"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("hello", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 3);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(2), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 5);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("bonjour", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 3);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(2), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 5);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("salut", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 0);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 3);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(2), matches }) => {
assert_eq!(matches.len(), 1);
let match_ = matches[0];
assert_eq!(match_.query_index, 0);
assert_eq!(match_.word_index, 5);
});
assert_matches!(iter.next(), None);
}
#[test]
/// Unique word has multi-word synonyms
fn unique_to_multiword_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("new", &[doc_char_index(0, 0, 0)][..]),
("york", &[doc_char_index(0, 1, 1)][..]),
("city", &[doc_char_index(0, 2, 2)][..]),
("subway", &[doc_char_index(0, 3, 3)][..]),
("NY", &[doc_char_index(1, 0, 0)][..]),
("subway", &[doc_char_index(1, 1, 1)][..]),
]);
store.add_synonym("NY", SetBuf::from_dirty(vec!["NYC", "new york", "new york city"]));
store.add_synonym("NYC", SetBuf::from_dirty(vec!["NY", "new york", "new york city"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("NY subway", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 1, .. })); // subway
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // new = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // york = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // city = NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 1, .. })); // subway
assert_matches!(iter.next(), None); // position rewritten ^
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("NYC subway", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 1, .. })); // subway
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // new = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // york = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // city = NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 1, .. })); // subway
assert_matches!(iter.next(), None); // position rewritten ^
});
assert_matches!(iter.next(), None);
}
#[test]
/// Unique word has multi-word synonyms
fn harder_unique_to_multiword_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("new", &[doc_char_index(0, 0, 0)][..]),
("york", &[doc_char_index(0, 1, 1)][..]),
("city", &[doc_char_index(0, 2, 2)][..]),
("yellow", &[doc_char_index(0, 3, 3)][..]),
("subway", &[doc_char_index(0, 4, 4)][..]),
("broken", &[doc_char_index(0, 5, 5)][..]),
("NY", &[doc_char_index(1, 0, 0)][..]),
("blue", &[doc_char_index(1, 1, 1)][..]),
("subway", &[doc_char_index(1, 2, 2)][..]),
]);
store.add_synonym("NY", SetBuf::from_dirty(vec!["NYC", "new york", "new york city"]));
store.add_synonym("NYC", SetBuf::from_dirty(vec!["NY", "new york", "new york city"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("NY subway", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // subway
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // new = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // york = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // city = NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // subway
assert_matches!(iter.next(), None); // position rewritten ^
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("NYC subway", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // subway
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // new = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // york = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // city = NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // subway
assert_matches!(iter.next(), None); // position rewritten ^
});
assert_matches!(iter.next(), None);
}
#[test]
/// Unique word has multi-word synonyms
fn even_harder_unique_to_multiword_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("new", &[doc_char_index(0, 0, 0)][..]),
("york", &[doc_char_index(0, 1, 1)][..]),
("city", &[doc_char_index(0, 2, 2)][..]),
("yellow", &[doc_char_index(0, 3, 3)][..]),
("underground", &[doc_char_index(0, 4, 4)][..]),
("train", &[doc_char_index(0, 5, 5)][..]),
("broken", &[doc_char_index(0, 6, 6)][..]),
("NY", &[doc_char_index(1, 0, 0)][..]),
("blue", &[doc_char_index(1, 1, 1)][..]),
("subway", &[doc_char_index(1, 2, 2)][..]),
]);
store.add_synonym("NY", SetBuf::from_dirty(vec!["NYC", "new york", "new york city"]));
store.add_synonym("NYC", SetBuf::from_dirty(vec!["NY", "new york", "new york city"]));
store.add_synonym("subway", SetBuf::from_dirty(vec!["underground train"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("NY subway broken", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // new = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // york = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // city = NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // underground = subway
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // train = subway
assert_matches!(iter.next(), Some(Match { query_index: 2, word_index: 3, .. })); // broken
assert_matches!(iter.next(), None); // position rewritten ^
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // subway
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("NYC subway", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // subway
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // new = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // york = NY
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // city = NY
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // underground = subway
assert_matches!(iter.next(), Some(Match { query_index: 1, word_index: 2, .. })); // train = subway
assert_matches!(iter.next(), None); // position rewritten ^
});
assert_matches!(iter.next(), None);
}
#[test]
/// Multi-word has multi-word synonyms
fn multiword_to_multiword_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("NY", &[doc_char_index(0, 0, 0)][..]),
("subway", &[doc_char_index(0, 1, 1)][..]),
("NYC", &[doc_char_index(1, 0, 0)][..]),
("blue", &[doc_char_index(1, 1, 1)][..]),
("subway", &[doc_char_index(1, 2, 2)][..]),
("broken", &[doc_char_index(1, 3, 3)][..]),
]);
store.add_synonym("new york", SetBuf::from_dirty(vec!["NYC", "NY", "new york city"]));
store.add_synonym("new york city", SetBuf::from_dirty(vec!["NYC", "NY", "new york"]));
store.add_synonym("underground train", SetBuf::from_dirty(vec!["subway"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("new york underground train broken", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NYC = new york
assert_matches!(iter.next(), Some(Match { query_index: 2, word_index: 2, .. })); // subway = underground train
assert_matches!(iter.next(), Some(Match { query_index: 4, word_index: 3, .. })); // broken
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NY = new york
assert_matches!(iter.next(), Some(Match { query_index: 2, word_index: 1, .. })); // subway = underground train
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("new york city underground train broken", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NYC = new york city
assert_matches!(iter.next(), Some(Match { query_index: 3, word_index: 2, .. })); // subway = underground train
assert_matches!(iter.next(), Some(Match { query_index: 5, word_index: 3, .. })); // broken
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, word_index: 0, .. })); // NY = new york city
assert_matches!(iter.next(), Some(Match { query_index: 3, word_index: 1, .. })); // subway = underground train
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), None);
}
#[test]
fn deunicoded_synonyms() {
let mut store = InMemorySetStore::from_iter(vec![
("iPhone", &[doc_index(0, 0)][..]),
("telephone", &[doc_index(1, 0)][..]), // meilidb-data indexes the unidecoded
("téléphone", &[doc_index(1, 0)][..]), // and the original words with the same DocIndex
]);
store.add_synonym("téléphone", SetBuf::from_dirty(vec!["iPhone"]));
let builder = QueryBuilder::new(&store);
let results = builder.query("telephone", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, .. }));
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, .. }));
assert_matches!(iter.next(), Some(Match { query_index: 0, .. }));
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("téléphone", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, .. }));
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, .. }));
assert_matches!(iter.next(), Some(Match { query_index: 0, .. }));
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), None);
let builder = QueryBuilder::new(&store);
let results = builder.query("télephone", 0..20).unwrap();
let mut iter = results.into_iter();
assert_matches!(iter.next(), Some(Document { id: DocumentId(0), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, .. }));
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), Some(Document { id: DocumentId(1), matches }) => {
let mut iter = matches.into_iter();
assert_matches!(iter.next(), Some(Match { query_index: 0, .. }));
assert_matches!(iter.next(), None);
});
assert_matches!(iter.next(), None);
}
}

11
meilidb-core/src/store.rs
View File

@ -8,6 +8,9 @@ pub trait Store {
fn words(&self) -> Result<&Set, Self::Error>;
fn word_indexes(&self, word: &[u8]) -> Result<Option<SetBuf<DocIndex>>, Self::Error>;
fn synonyms(&self) -> Result<&Set, Self::Error>;
fn alternatives_to(&self, word: &[u8]) -> Result<Option<Set>, Self::Error>;
}
impl<T> Store for &'_ T where T: Store {
@ -20,4 +23,12 @@ impl<T> Store for &'_ T where T: Store {
fn word_indexes(&self, word: &[u8]) -> Result<Option<SetBuf<DocIndex>>, Self::Error> {
(*self).word_indexes(word)
}
fn synonyms(&self) -> Result<&Set, Self::Error> {
(*self).synonyms()
}
fn alternatives_to(&self, word: &[u8]) -> Result<Option<Set>, Self::Error> {
(*self).alternatives_to(word)
}
}

3
meilidb-data/src/database/documents_addition.rs
View File

@ -120,11 +120,12 @@ impl<'a> DocumentsAddition<'a> {
// update the "consistent" view of the Index
let ranked_map = self.ranked_map;
let synonyms = fst::Set::from_bytes(lease_inner.synonyms.as_fst().to_vec()).unwrap(); // clone()
let schema = lease_inner.schema.clone();
let raw = lease_inner.raw.clone();
lease_inner.raw.compact();
let inner = InnerIndex { words, schema, ranked_map, raw };
let inner = InnerIndex { words, synonyms, schema, ranked_map, raw };
self.inner.0.store(Arc::new(inner));
Ok(())

3
meilidb-data/src/database/documents_deletion.rs
View File

@ -119,11 +119,12 @@ impl<'a> DocumentsDeletion<'a> {
// update the "consistent" view of the Index
let ranked_map = lease_inner.ranked_map.clone();
let synonyms = fst::Set::from_bytes(lease_inner.synonyms.as_fst().to_vec()).unwrap(); // clone()
let schema = lease_inner.schema.clone();
let raw = lease_inner.raw.clone();
lease_inner.raw.compact();
let inner = InnerIndex { words, schema, ranked_map, raw };
let inner = InnerIndex { words, synonyms, schema, ranked_map, raw };
self.inner.0.store(Arc::new(inner));
Ok(())

30
meilidb-data/src/database/index.rs
View File

@ -13,7 +13,11 @@ use crate::ranked_map::RankedMap;
use crate::serde::Deserializer;
use super::{Error, CustomSettings};
use super::{RawIndex, DocumentsAddition, DocumentsDeletion};
use super::{
RawIndex,
DocumentsAddition, DocumentsDeletion,
SynonymsAddition, SynonymsDeletion,
};
#[derive(Copy, Clone)]
pub struct IndexStats {
@ -27,6 +31,7 @@ pub struct Index(pub ArcSwap<InnerIndex>);
pub struct InnerIndex {
pub words: fst::Set,
pub synonyms: fst::Set,
pub schema: Schema,
pub ranked_map: RankedMap,
pub raw: RawIndex, // TODO this will be a snapshot in the future
@ -39,6 +44,11 @@ impl Index {
None => fst::Set::default(),
};
let synonyms = match raw.main.synonyms_set()? {
Some(synonyms) => synonyms,
None => fst::Set::default(),
};
let schema = match raw.main.schema()? {
Some(schema) => schema,
None => return Err(Error::SchemaMissing),
@ -49,7 +59,7 @@ impl Index {
None => RankedMap::default(),
};
let inner = InnerIndex { words, schema, ranked_map, raw };
let inner = InnerIndex { words, synonyms, schema, ranked_map, raw };
let index = Index(ArcSwap::new(Arc::new(inner)));
Ok(index)
@ -101,6 +111,14 @@ impl Index {
DocumentsDeletion::new(self, ranked_map)
}
pub fn synonyms_addition(&self) -> SynonymsAddition {
SynonymsAddition::new(self)
}
pub fn synonyms_deletion(&self) -> SynonymsDeletion {
SynonymsDeletion::new(self)
}
pub fn document<T>(
&self,
fields: Option<&HashSet<&str>>,
@ -141,4 +159,12 @@ impl Store for IndexLease {
fn word_indexes(&self, word: &[u8]) -> Result<Option<SetBuf<DocIndex>>, Self::Error> {
Ok(self.0.raw.words.doc_indexes(word)?)
}
fn synonyms(&self) -> Result<&fst::Set, Self::Error> {
Ok(&self.0.synonyms)
}
fn alternatives_to(&self, word: &[u8]) -> Result<Option<fst::Set>, Self::Error> {
Ok(self.0.raw.synonyms.alternatives_to(word)?)
}
}

16
meilidb-data/src/database/main_index.rs
View File

@ -44,6 +44,22 @@ impl MainIndex {
self.0.set("words", value.as_fst().as_bytes()).map_err(Into::into)
}
pub fn synonyms_set(&self) -> Result<Option<fst::Set>, Error> {
match self.0.get_pinned("synonyms")? {
Some(bytes) => {
let len = bytes.len();
let value = Arc::from(bytes.as_ref());
let fst = fst::raw::Fst::from_shared_bytes(value, 0, len)?;
Ok(Some(fst::Set::from(fst)))
},
None => Ok(None),
}
}
pub fn set_synonyms_set(&self, value: &fst::Set) -> Result<(), Error> {
self.0.set("synonyms", value.as_fst().as_bytes()).map_err(Into::into)
}
pub fn ranked_map(&self) -> Result<Option<RankedMap>, Error> {
match self.0.get_pinned("ranked-map")? {
Some(bytes) => {

22
meilidb-data/src/database/mod.rs
View File

@ -13,6 +13,9 @@ mod error;
mod index;
mod main_index;
mod raw_index;
mod synonyms_addition;
mod synonyms_deletion;
mod synonyms_index;
mod words_index;
pub use self::error::Error;
@ -22,11 +25,14 @@ pub use self::custom_settings::CustomSettings;
use self::docs_words_index::DocsWordsIndex;
use self::documents_addition::DocumentsAddition;
use self::documents_deletion::DocumentsDeletion;
use self::synonyms_addition::SynonymsAddition;
use self::synonyms_deletion::SynonymsDeletion;
use self::documents_index::DocumentsIndex;
use self::index::InnerIndex;
use self::main_index::MainIndex;
use self::raw_index::{RawIndex, InnerRawIndex};
use self::words_index::WordsIndex;
use self::synonyms_index::SynonymsIndex;
pub struct Database {
cache: RwLock<HashMap<String, Arc<Index>>>,
@ -99,6 +105,12 @@ impl Database {
MainIndex(InnerRawIndex::new(self.inner.clone(), Arc::from(name)))
};
let synonyms = {
let cf_name = format!("{}-synonyms", name);
self.inner.cf_handle(&cf_name).expect("cf not found");
SynonymsIndex(InnerRawIndex::new(self.inner.clone(), Arc::from(cf_name)))
};
let words = {
let cf_name = format!("{}-words", name);
self.inner.cf_handle(&cf_name).expect("cf not found");
@ -123,7 +135,7 @@ impl Database {
CustomSettings(InnerRawIndex::new(self.inner.clone(), Arc::from(cf_name)))
};
let raw_index = RawIndex { main, words, docs_words, documents, custom };
let raw_index = RawIndex { main, synonyms, words, docs_words, documents, custom };
let index = Index::from_raw(raw_index)?;
vacant.insert(Arc::new(index)).clone()
@ -154,6 +166,12 @@ impl Database {
main.set_schema(&schema)?;
let synonyms = {
let cf_name = format!("{}-synonyms", name);
self.inner.create_cf(&cf_name, &rocksdb::Options::default())?;
SynonymsIndex(InnerRawIndex::new(self.inner.clone(), Arc::from(cf_name)))
};
let words = {
let cf_name = format!("{}-words", name);
self.inner.create_cf(&cf_name, &rocksdb::Options::default())?;
@ -182,7 +200,7 @@ impl Database {
indexes.insert(name.to_string());
self.set_indexes(&indexes)?;
let raw_index = RawIndex { main, words, docs_words, documents, custom };
let raw_index = RawIndex { main, synonyms, words, docs_words, documents, custom };
let index = Index::from_raw(raw_index)?;
vacant.insert(Arc::new(index)).clone()

4
meilidb-data/src/database/raw_index.rs
View File

@ -1,9 +1,10 @@
use std::sync::Arc;
use super::{MainIndex, WordsIndex, DocsWordsIndex, DocumentsIndex, CustomSettings};
use super::{MainIndex, SynonymsIndex, WordsIndex, DocsWordsIndex, DocumentsIndex, CustomSettings};
#[derive(Clone)]
pub struct RawIndex {
pub main: MainIndex,
pub synonyms: SynonymsIndex,
pub words: WordsIndex,
pub docs_words: DocsWordsIndex,
pub documents: DocumentsIndex,
@ -13,6 +14,7 @@ pub struct RawIndex {
impl RawIndex {
pub(crate) fn compact(&self) {
self.main.0.compact_range(None::<&[u8]>, None::<&[u8]>);
self.synonyms.0.compact_range(None::<&[u8]>, None::<&[u8]>);
self.words.0.compact_range(None::<&[u8]>, None::<&[u8]>);
self.docs_words.0.compact_range(None::<&[u8]>, None::<&[u8]>);
self.documents.0.compact_range(None::<&[u8]>, None::<&[u8]>);

86
meilidb-data/src/database/synonyms_addition.rs Normal file
View File

@ -0,0 +1,86 @@
use std::collections::BTreeMap;
use std::sync::Arc;
use fst::{SetBuilder, set::OpBuilder};
use meilidb_core::normalize_str;
use sdset::SetBuf;
use crate::database::index::InnerIndex;
use super::{Error, Index};
pub struct SynonymsAddition<'a> {
inner: &'a Index,
synonyms: BTreeMap<String, Vec<String>>,
}
impl<'a> SynonymsAddition<'a> {
pub fn new(inner: &'a Index) -> SynonymsAddition<'a> {
SynonymsAddition { inner, synonyms: BTreeMap::new() }
}
pub fn add_synonym<S, T, I>(&mut self, synonym: S, alternatives: I)
where S: AsRef<str>,
T: AsRef<str>,
I: Iterator<Item=T>,
{
let synonym = normalize_str(synonym.as_ref());
let alternatives = alternatives.map(|s| s.as_ref().to_lowercase());
self.synonyms.entry(synonym).or_insert_with(Vec::new).extend(alternatives);
}
pub fn finalize(self) -> Result<(), Error> {
let lease_inner = self.inner.lease_inner();
let synonyms = &lease_inner.raw.synonyms;
let main = &lease_inner.raw.main;
let mut synonyms_builder = SetBuilder::memory();
for (synonym, alternatives) in self.synonyms {
synonyms_builder.insert(&synonym).unwrap();
let alternatives = {
let alternatives = SetBuf::from_dirty(alternatives);
let mut alternatives_builder = SetBuilder::memory();
alternatives_builder.extend_iter(alternatives).unwrap();
alternatives_builder.into_inner().unwrap()
};
synonyms.set_alternatives_to(synonym.as_bytes(), alternatives)?;
}
let delta_synonyms = synonyms_builder
.into_inner()
.and_then(fst::Set::from_bytes)
.unwrap();
let synonyms = match main.synonyms_set()? {
Some(synonyms) => {
let op = OpBuilder::new()
.add(synonyms.stream())
.add(delta_synonyms.stream())
.r#union();
let mut synonyms_builder = SetBuilder::memory();
synonyms_builder.extend_stream(op).unwrap();
synonyms_builder
.into_inner()
.and_then(fst::Set::from_bytes)
.unwrap()
},
None => delta_synonyms,
};
main.set_synonyms_set(&synonyms)?;
// update the "consistent" view of the Index
let words = main.words_set()?.unwrap_or_default();
let ranked_map = lease_inner.ranked_map.clone();;
let schema = lease_inner.schema.clone();
let raw = lease_inner.raw.clone();
lease_inner.raw.compact();
let inner = InnerIndex { words, synonyms, schema, ranked_map, raw };
self.inner.0.store(Arc::new(inner));
Ok(())
}
}

129
meilidb-data/src/database/synonyms_deletion.rs Normal file
View File

@ -0,0 +1,129 @@
use std::collections::BTreeMap;
use std::iter::FromIterator;
use std::sync::Arc;
use fst::{SetBuilder, set::OpBuilder};
use meilidb_core::normalize_str;
use sdset::SetBuf;
use crate::database::index::InnerIndex;
use super::{Error, Index};
pub struct SynonymsDeletion<'a> {
inner: &'a Index,
synonyms: BTreeMap<String, Option<Vec<String>>>,
}
impl<'a> SynonymsDeletion<'a> {
pub fn new(inner: &'a Index) -> SynonymsDeletion<'a> {
SynonymsDeletion { inner, synonyms: BTreeMap::new() }
}
pub fn delete_all_alternatives_of<S: AsRef<str>>(&mut self, synonym: S) {
let synonym = normalize_str(synonym.as_ref());
self.synonyms.insert(synonym, None);
}
pub fn delete_specific_alternatives_of<S, T, I>(&mut self, synonym: S, alternatives: I)
where S: AsRef<str>,
T: AsRef<str>,
I: Iterator<Item=T>,
{
let synonym = normalize_str(synonym.as_ref());
let value = self.synonyms.entry(synonym).or_insert(None);
let alternatives = alternatives.map(|s| s.as_ref().to_lowercase());
match value {
Some(v) => v.extend(alternatives),
None => *value = Some(Vec::from_iter(alternatives)),
}
}
pub fn finalize(self) -> Result<(), Error> {
let lease_inner = self.inner.lease_inner();
let synonyms = &lease_inner.raw.synonyms;
let main = &lease_inner.raw.main;
let mut delete_whole_synonym_builder = SetBuilder::memory();
for (synonym, alternatives) in self.synonyms {
match alternatives {
Some(alternatives) => {
let prev_alternatives = synonyms.alternatives_to(synonym.as_bytes())?;
let prev_alternatives = match prev_alternatives {
Some(alternatives) => alternatives,
None => continue,
};
let delta_alternatives = {
let alternatives = SetBuf::from_dirty(alternatives);
let mut builder = SetBuilder::memory();
builder.extend_iter(alternatives).unwrap();
builder.into_inner()
.and_then(fst::Set::from_bytes)
.unwrap()
};
let op = OpBuilder::new()
.add(prev_alternatives.stream())
.add(delta_alternatives.stream())
.difference();
let (alternatives, empty_alternatives) = {
let mut builder = SetBuilder::memory();
let len = builder.get_ref().len();
builder.extend_stream(op).unwrap();
let is_empty = len == builder.get_ref().len();
let alternatives = builder.into_inner().unwrap();
(alternatives, is_empty)
};
if empty_alternatives {
delete_whole_synonym_builder.insert(synonym.as_bytes())?;
} else {
synonyms.set_alternatives_to(synonym.as_bytes(), alternatives)?;
}
},
None => {
delete_whole_synonym_builder.insert(&synonym).unwrap();
synonyms.del_alternatives_of(synonym.as_bytes())?;
}
}
}
let delta_synonyms = delete_whole_synonym_builder
.into_inner()
.and_then(fst::Set::from_bytes)
.unwrap();
let synonyms = match main.synonyms_set()? {
Some(synonyms) => {
let op = OpBuilder::new()
.add(synonyms.stream())
.add(delta_synonyms.stream())
.difference();
let mut synonyms_builder = SetBuilder::memory();
synonyms_builder.extend_stream(op).unwrap();
synonyms_builder
.into_inner()
.and_then(fst::Set::from_bytes)
.unwrap()
},
None => fst::Set::default(),
};
main.set_synonyms_set(&synonyms)?;
// update the "consistent" view of the Index
let words = main.words_set()?.unwrap_or_default();
let ranked_map = lease_inner.ranked_map.clone();
let schema = lease_inner.schema.clone();
let raw = lease_inner.raw.clone();
lease_inner.raw.compact();
let inner = InnerIndex { words, synonyms, schema, ranked_map, raw };
self.inner.0.store(Arc::new(inner));
Ok(())
}
}

23
meilidb-data/src/database/synonyms_index.rs Normal file
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@ -0,0 +1,23 @@
use crate::database::raw_index::InnerRawIndex;
#[derive(Clone)]
pub struct SynonymsIndex(pub(crate) InnerRawIndex);
impl SynonymsIndex {
pub fn alternatives_to(&self, word: &[u8]) -> Result<Option<fst::Set>, rocksdb::Error> {
match self.0.get(word)? {
Some(vector) => Ok(Some(fst::Set::from_bytes(vector.to_vec()).unwrap())),
None => Ok(None),
}
}
pub fn set_alternatives_to(&self, word: &[u8], value: Vec<u8>) -> Result<(), rocksdb::Error> {
self.0.set(word, value)?;
Ok(())
}
pub fn del_alternatives_of(&self, word: &[u8]) -> Result<(), rocksdb::Error> {
self.0.delete(word)?;
Ok(())
}
}