mirror of
https://github.com/meilisearch/meilisearch.git
synced 2024-11-22 01:57:41 +08:00
remove milli/src/update/new/extract/tokenize_document.rs
This commit is contained in:
ManyTheFish
parent
3b82d8b5b9
commit
1eb75a1040
@ -1,320 +0,0 @@
|
||||
use std::collections::HashMap;
|
||||
|
||||
use charabia::{SeparatorKind, Token, TokenKind, Tokenizer};
|
||||
use serde_json::Value;
|
||||
|
||||
use crate::update::new::KvReaderFieldId;
|
||||
use crate::{
|
||||
FieldId, GlobalFieldsIdsMap, InternalError, LocalizedAttributesRule, Result, MAX_WORD_LENGTH,
|
||||
};
|
||||
|
||||
pub struct DocumentTokenizer<'a> {
|
||||
pub tokenizer: &'a Tokenizer<'a>,
|
||||
pub searchable_attributes: Option<&'a [&'a str]>,
|
||||
pub localized_attributes_rules: &'a [LocalizedAttributesRule],
|
||||
pub max_positions_per_attributes: u32,
|
||||
}
|
||||
|
||||
impl<'a> DocumentTokenizer<'a> {
|
||||
pub fn tokenize_document(
|
||||
&self,
|
||||
obkv: &KvReaderFieldId,
|
||||
field_id_map: &mut GlobalFieldsIdsMap,
|
||||
token_fn: &mut impl FnMut(FieldId, u16, &str),
|
||||
) -> Result<()> {
|
||||
let mut field_position = HashMap::new();
|
||||
let mut field_name = String::new();
|
||||
for (field_id, field_bytes) in obkv {
|
||||
let Some(field_name) = field_id_map.name(field_id).map(|s| {
|
||||
field_name.clear();
|
||||
field_name.push_str(s);
|
||||
&field_name
|
||||
}) else {
|
||||
unreachable!("field id not found in field id map");
|
||||
};
|
||||
|
||||
let mut tokenize_field = |name: &str, value: &Value| {
|
||||
let Some(field_id) = field_id_map.id_or_insert(name) else {
|
||||
/// TODO: better error
|
||||
panic!("it's over 9000");
|
||||
};
|
||||
|
||||
let position =
|
||||
field_position.entry(field_id).and_modify(|counter| *counter += 8).or_insert(0);
|
||||
if *position as u32 >= self.max_positions_per_attributes {
|
||||
return;
|
||||
}
|
||||
|
||||
match value {
|
||||
Value::Number(n) => {
|
||||
let token = n.to_string();
|
||||
if let Ok(position) = (*position).try_into() {
|
||||
token_fn(field_id, position, token.as_str());
|
||||
}
|
||||
}
|
||||
Value::String(text) => {
|
||||
// create an iterator of token with their positions.
|
||||
let locales = self
|
||||
.localized_attributes_rules
|
||||
.iter()
|
||||
.find(|rule| rule.match_str(field_name))
|
||||
.map(|rule| rule.locales());
|
||||
let tokens = process_tokens(
|
||||
*position,
|
||||
self.tokenizer.tokenize_with_allow_list(text.as_str(), locales),
|
||||
)
|
||||
.take_while(|(p, _)| (*p as u32) < self.max_positions_per_attributes);
|
||||
|
||||
for (index, token) in tokens {
|
||||
// keep a word only if it is not empty and fit in a LMDB key.
|
||||
let token = token.lemma().trim();
|
||||
if !token.is_empty() && token.len() <= MAX_WORD_LENGTH {
|
||||
*position = index;
|
||||
if let Ok(position) = (*position).try_into() {
|
||||
token_fn(field_id, position, token);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
_ => (),
|
||||
}
|
||||
};
|
||||
|
||||
// if the current field is searchable or contains a searchable attribute
|
||||
if self.searchable_attributes.map_or(true, |attributes| {
|
||||
attributes.iter().any(|name| perm_json_p::contained_in(name, &field_name))
|
||||
}) {
|
||||
// parse json.
|
||||
match serde_json::from_slice(field_bytes).map_err(InternalError::SerdeJson)? {
|
||||
Value::Object(object) => perm_json_p::seek_leaf_values_in_object(
|
||||
&object,
|
||||
self.searchable_attributes.as_deref(),
|
||||
&field_name,
|
||||
&mut tokenize_field,
|
||||
),
|
||||
Value::Array(array) => perm_json_p::seek_leaf_values_in_array(
|
||||
&array,
|
||||
self.searchable_attributes.as_deref(),
|
||||
&field_name,
|
||||
&mut tokenize_field,
|
||||
),
|
||||
value => tokenize_field(&field_name, &value),
|
||||
}
|
||||
}
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
/// take an iterator on tokens and compute their relative position depending on separator kinds
|
||||
/// if it's an `Hard` separator we add an additional relative proximity of 8 between words,
|
||||
/// else we keep the standard proximity of 1 between words.
|
||||
fn process_tokens<'a>(
|
||||
start_offset: usize,
|
||||
tokens: impl Iterator<Item = Token<'a>>,
|
||||
) -> impl Iterator<Item = (usize, Token<'a>)> {
|
||||
tokens
|
||||
.skip_while(|token| token.is_separator())
|
||||
.scan((start_offset, None), |(offset, prev_kind), mut token| {
|
||||
match token.kind {
|
||||
TokenKind::Word | TokenKind::StopWord if !token.lemma().is_empty() => {
|
||||
*offset += match *prev_kind {
|
||||
Some(TokenKind::Separator(SeparatorKind::Hard)) => 8,
|
||||
Some(_) => 1,
|
||||
None => 0,
|
||||
};
|
||||
*prev_kind = Some(token.kind)
|
||||
}
|
||||
TokenKind::Separator(SeparatorKind::Hard) => {
|
||||
*prev_kind = Some(token.kind);
|
||||
}
|
||||
TokenKind::Separator(SeparatorKind::Soft)
|
||||
if *prev_kind != Some(TokenKind::Separator(SeparatorKind::Hard)) =>
|
||||
{
|
||||
*prev_kind = Some(token.kind);
|
||||
}
|
||||
_ => token.kind = TokenKind::Unknown,
|
||||
}
|
||||
Some((*offset, token))
|
||||
})
|
||||
.filter(|(_, t)| t.is_word())
|
||||
}
|
||||
|
||||
/// TODO move in permissive json pointer
|
||||
mod perm_json_p {
|
||||
use serde_json::{Map, Value};
|
||||
const SPLIT_SYMBOL: char = '.';
|
||||
|
||||
/// Returns `true` if the `selector` match the `key`.
|
||||
///
|
||||
/// ```text
|
||||
/// Example:
|
||||
/// `animaux` match `animaux`
|
||||
/// `animaux.chien` match `animaux`
|
||||
/// `animaux.chien` match `animaux`
|
||||
/// `animaux.chien.nom` match `animaux`
|
||||
/// `animaux.chien.nom` match `animaux.chien`
|
||||
/// -----------------------------------------
|
||||
/// `animaux` doesn't match `animaux.chien`
|
||||
/// `animaux.` doesn't match `animaux`
|
||||
/// `animaux.ch` doesn't match `animaux.chien`
|
||||
/// `animau` doesn't match `animaux`
|
||||
/// ```
|
||||
pub fn contained_in(selector: &str, key: &str) -> bool {
|
||||
selector.starts_with(key)
|
||||
&& selector[key.len()..].chars().next().map(|c| c == SPLIT_SYMBOL).unwrap_or(true)
|
||||
}
|
||||
|
||||
pub fn seek_leaf_values<'a>(
|
||||
value: &Map<String, Value>,
|
||||
selectors: impl IntoIterator<Item = &'a str>,
|
||||
seeker: &mut impl FnMut(&str, &Value),
|
||||
) {
|
||||
let selectors: Vec<_> = selectors.into_iter().collect();
|
||||
seek_leaf_values_in_object(value, Some(&selectors), "", seeker);
|
||||
}
|
||||
|
||||
pub fn seek_leaf_values_in_object(
|
||||
value: &Map<String, Value>,
|
||||
selectors: Option<&[&str]>,
|
||||
base_key: &str,
|
||||
seeker: &mut impl FnMut(&str, &Value),
|
||||
) {
|
||||
for (key, value) in value.iter() {
|
||||
let base_key = if base_key.is_empty() {
|
||||
key.to_string()
|
||||
} else {
|
||||
format!("{}{}{}", base_key, SPLIT_SYMBOL, key)
|
||||
};
|
||||
|
||||
// here if the user only specified `doggo` we need to iterate in all the fields of `doggo`
|
||||
// so we check the contained_in on both side
|
||||
let should_continue = selectors.map_or(true, |selectors| {
|
||||
selectors.iter().any(|selector| {
|
||||
contained_in(selector, &base_key) || contained_in(&base_key, selector)
|
||||
})
|
||||
});
|
||||
|
||||
if should_continue {
|
||||
match value {
|
||||
Value::Object(object) => {
|
||||
seek_leaf_values_in_object(object, selectors, &base_key, seeker)
|
||||
}
|
||||
Value::Array(array) => {
|
||||
seek_leaf_values_in_array(array, selectors, &base_key, seeker)
|
||||
}
|
||||
value => seeker(&base_key, value),
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub fn seek_leaf_values_in_array(
|
||||
values: &[Value],
|
||||
selectors: Option<&[&str]>,
|
||||
base_key: &str,
|
||||
seeker: &mut impl FnMut(&str, &Value),
|
||||
) {
|
||||
for value in values {
|
||||
match value {
|
||||
Value::Object(object) => {
|
||||
seek_leaf_values_in_object(object, selectors, base_key, seeker)
|
||||
}
|
||||
Value::Array(array) => {
|
||||
seek_leaf_values_in_array(array, selectors, base_key, seeker)
|
||||
}
|
||||
value => seeker(base_key, value),
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use charabia::TokenizerBuilder;
|
||||
use meili_snap::snapshot;
|
||||
use obkv::KvReader;
|
||||
use serde_json::json;
|
||||
|
||||
use super::*;
|
||||
use crate::FieldsIdsMap;
|
||||
|
||||
#[test]
|
||||
fn test_tokenize_document() {
|
||||
let mut fields_ids_map = FieldsIdsMap::new();
|
||||
|
||||
let field_1 = json!({
|
||||
"name": "doggo",
|
||||
"age": 10,
|
||||
});
|
||||
|
||||
let field_2 = json!({
|
||||
"catto": {
|
||||
"name": "pesti",
|
||||
"age": 23,
|
||||
}
|
||||
});
|
||||
|
||||
let field_3 = json!(["doggo", "catto"]);
|
||||
|
||||
let mut obkv = obkv::KvWriter::memory();
|
||||
let field_1_id = fields_ids_map.insert("doggo").unwrap();
|
||||
let field_1 = serde_json::to_string(&field_1).unwrap();
|
||||
obkv.insert(field_1_id, field_1.as_bytes()).unwrap();
|
||||
let field_2_id = fields_ids_map.insert("catto").unwrap();
|
||||
let field_2 = serde_json::to_string(&field_2).unwrap();
|
||||
obkv.insert(field_2_id, field_2.as_bytes()).unwrap();
|
||||
let field_3_id = fields_ids_map.insert("doggo.name").unwrap();
|
||||
let field_3 = serde_json::to_string(&field_3).unwrap();
|
||||
obkv.insert(field_3_id, field_3.as_bytes()).unwrap();
|
||||
let value = obkv.into_inner().unwrap();
|
||||
let obkv = KvReader::from_slice(value.as_slice());
|
||||
|
||||
let mut tb = TokenizerBuilder::default();
|
||||
let document_tokenizer = DocumentTokenizer {
|
||||
tokenizer: &tb.build(),
|
||||
searchable_attributes: None,
|
||||
localized_attributes_rules: &[],
|
||||
max_positions_per_attributes: 1000,
|
||||
};
|
||||
|
||||
let fields_ids_map_lock = std::sync::RwLock::new(fields_ids_map);
|
||||
let mut global_fields_ids_map = GlobalFieldsIdsMap::new(&fields_ids_map_lock);
|
||||
|
||||
let mut words = std::collections::BTreeMap::new();
|
||||
document_tokenizer
|
||||
.tokenize_document(obkv, &mut global_fields_ids_map, &mut |fid, pos, word| {
|
||||
words.insert([fid, pos], word.to_string());
|
||||
})
|
||||
.unwrap();
|
||||
|
||||
snapshot!(format!("{:#?}", words), @r###"
|
||||
{
|
||||
[
|
||||
2,
|
||||
0,
|
||||
]: "doggo",
|
||||
[
|
||||
2,
|
||||
8,
|
||||
]: "doggo",
|
||||
[
|
||||
2,
|
||||
16,
|
||||
]: "catto",
|
||||
[
|
||||
3,
|
||||
0,
|
||||
]: "10",
|
||||
[
|
||||
4,
|
||||
0,
|
||||
]: "pesti",
|
||||
[
|
||||
5,
|
||||
0,
|
||||
]: "23",
|
||||
}
|
||||
"###);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user