implementation of tantivy datastore + updated RPC calls to deal with tantivy + docs
This commit is contained in:
Maxime Van Hees
667
src/tantivy_search.rs
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667
src/tantivy_search.rs
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@@ -0,0 +1,667 @@
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use crate::error::DBError;
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use serde::{Deserialize, Serialize};
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use std::collections::HashMap;
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use std::path::PathBuf;
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use std::sync::{Arc, RwLock};
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use tantivy::{
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collector::TopDocs,
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directory::MmapDirectory,
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query::{BooleanQuery, Occur, Query, QueryParser, TermQuery},
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schema::{
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DateOptions, Field, IndexRecordOption, NumericOptions, Schema, TextFieldIndexing, TextOptions, STORED, STRING,
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},
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tokenizer::TokenizerManager,
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DateTime, Index, IndexReader, IndexWriter, TantivyDocument, Term,
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};
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use tantivy::schema::Value;
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub enum FieldDef {
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Text {
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stored: bool,
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indexed: bool,
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tokenized: bool,
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fast: bool,
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},
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Numeric {
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stored: bool,
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indexed: bool,
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fast: bool,
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precision: NumericType,
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},
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Tag {
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stored: bool,
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separator: String,
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case_sensitive: bool,
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},
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Geo {
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stored: bool,
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},
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub enum NumericType {
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I64,
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U64,
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F64,
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Date,
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}
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pub struct IndexSchema {
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schema: Schema,
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fields: HashMap<String, (Field, FieldDef)>,
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default_search_fields: Vec<Field>,
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}
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pub struct TantivySearch {
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index: Index,
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writer: Arc<RwLock<IndexWriter>>,
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reader: IndexReader,
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index_schema: IndexSchema,
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name: String,
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config: IndexConfig,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct IndexConfig {
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pub language: String,
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pub stopwords: Vec<String>,
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pub stemming: bool,
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pub max_doc_count: Option<usize>,
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pub default_score: f64,
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}
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impl Default for IndexConfig {
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fn default() -> Self {
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IndexConfig {
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language: "english".to_string(),
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stopwords: vec![],
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stemming: true,
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max_doc_count: None,
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default_score: 1.0,
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}
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}
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}
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impl TantivySearch {
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pub fn new_with_schema(
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base_path: PathBuf,
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name: String,
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field_definitions: Vec<(String, FieldDef)>,
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config: Option<IndexConfig>,
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) -> Result<Self, DBError> {
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let index_path = base_path.join(&name);
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std::fs::create_dir_all(&index_path)
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.map_err(|e| DBError(format!("Failed to create index dir: {}", e)))?;
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// Build schema from field definitions
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let mut schema_builder = Schema::builder();
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let mut fields = HashMap::new();
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let mut default_search_fields = Vec::new();
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// Always add a document ID field
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let id_field = schema_builder.add_text_field("_id", STRING | STORED);
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fields.insert(
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"_id".to_string(),
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(
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id_field,
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FieldDef::Text {
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stored: true,
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indexed: true,
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tokenized: false,
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fast: false,
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},
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),
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);
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// Add user-defined fields
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for (field_name, field_def) in field_definitions {
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let field = match &field_def {
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FieldDef::Text {
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stored,
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indexed,
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tokenized,
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fast: _fast,
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} => {
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let mut text_options = TextOptions::default();
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if *stored {
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text_options = text_options.set_stored();
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}
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if *indexed {
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let indexing_options = if *tokenized {
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TextFieldIndexing::default()
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.set_tokenizer("default")
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.set_index_option(IndexRecordOption::WithFreqsAndPositions)
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} else {
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TextFieldIndexing::default()
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.set_tokenizer("raw")
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.set_index_option(IndexRecordOption::Basic)
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};
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text_options = text_options.set_indexing_options(indexing_options);
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let f = schema_builder.add_text_field(&field_name, text_options);
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if *tokenized {
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default_search_fields.push(f);
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}
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f
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} else {
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schema_builder.add_text_field(&field_name, text_options)
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}
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}
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FieldDef::Numeric {
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stored,
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indexed,
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fast,
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precision,
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} => match precision {
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NumericType::I64 => {
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let mut opts = NumericOptions::default();
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if *stored {
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opts = opts.set_stored();
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}
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if *indexed {
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opts = opts.set_indexed();
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}
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if *fast {
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opts = opts.set_fast();
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}
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schema_builder.add_i64_field(&field_name, opts)
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}
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NumericType::U64 => {
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let mut opts = NumericOptions::default();
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if *stored {
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opts = opts.set_stored();
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}
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if *indexed {
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opts = opts.set_indexed();
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}
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if *fast {
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opts = opts.set_fast();
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}
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schema_builder.add_u64_field(&field_name, opts)
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}
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NumericType::F64 => {
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let mut opts = NumericOptions::default();
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if *stored {
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opts = opts.set_stored();
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}
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if *indexed {
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opts = opts.set_indexed();
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}
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if *fast {
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opts = opts.set_fast();
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}
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schema_builder.add_f64_field(&field_name, opts)
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}
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NumericType::Date => {
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let mut opts = DateOptions::default();
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if *stored {
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opts = opts.set_stored();
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}
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if *indexed {
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opts = opts.set_indexed();
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}
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if *fast {
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opts = opts.set_fast();
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}
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schema_builder.add_date_field(&field_name, opts)
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}
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},
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FieldDef::Tag {
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stored,
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separator: _,
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case_sensitive: _,
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} => {
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let mut text_options = TextOptions::default();
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if *stored {
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text_options = text_options.set_stored();
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}
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text_options = text_options.set_indexing_options(
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TextFieldIndexing::default()
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.set_tokenizer("raw")
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.set_index_option(IndexRecordOption::Basic),
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);
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schema_builder.add_text_field(&field_name, text_options)
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}
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FieldDef::Geo { stored } => {
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// For now, store as two f64 fields for lat/lon
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let mut opts = NumericOptions::default();
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if *stored {
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opts = opts.set_stored();
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}
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opts = opts.set_indexed().set_fast();
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let lat_field =
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schema_builder.add_f64_field(&format!("{}_lat", field_name), opts.clone());
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let lon_field =
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schema_builder.add_f64_field(&format!("{}_lon", field_name), opts);
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fields.insert(
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format!("{}_lat", field_name),
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(
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lat_field,
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FieldDef::Numeric {
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stored: *stored,
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indexed: true,
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fast: true,
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precision: NumericType::F64,
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},
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),
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);
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fields.insert(
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format!("{}_lon", field_name),
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(
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lon_field,
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FieldDef::Numeric {
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stored: *stored,
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indexed: true,
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fast: true,
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precision: NumericType::F64,
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},
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),
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);
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continue; // Skip adding the geo field itself
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}
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};
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fields.insert(field_name.clone(), (field, field_def));
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}
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let schema = schema_builder.build();
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let index_schema = IndexSchema {
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schema: schema.clone(),
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fields,
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default_search_fields,
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};
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// Create or open index
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let dir = MmapDirectory::open(&index_path)
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.map_err(|e| DBError(format!("Failed to open index directory: {}", e)))?;
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let mut index =
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Index::open_or_create(dir, schema).map_err(|e| DBError(format!("Failed to create index: {}", e)))?;
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// Configure tokenizers
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let tokenizer_manager = TokenizerManager::default();
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index.set_tokenizers(tokenizer_manager);
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let writer = index
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.writer(15_000_000)
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.map_err(|e| DBError(format!("Failed to create index writer: {}", e)))?;
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let reader = index
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.reader()
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.map_err(|e| DBError(format!("Failed to create reader: {}", e)))?;
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let config = config.unwrap_or_default();
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Ok(TantivySearch {
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index,
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writer: Arc::new(RwLock::new(writer)),
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reader,
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index_schema,
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name,
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config,
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})
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}
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pub fn add_document_with_fields(
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&self,
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doc_id: &str,
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fields: HashMap<String, String>,
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) -> Result<(), DBError> {
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let mut writer = self
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.writer
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.write()
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.map_err(|e| DBError(format!("Failed to acquire writer lock: {}", e)))?;
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// Delete existing document with same ID
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if let Some((id_field, _)) = self.index_schema.fields.get("_id") {
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writer.delete_term(Term::from_field_text(*id_field, doc_id));
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}
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// Create new document
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let mut doc = tantivy::doc!();
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// Add document ID
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if let Some((id_field, _)) = self.index_schema.fields.get("_id") {
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doc.add_text(*id_field, doc_id);
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}
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// Add other fields based on schema
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for (field_name, field_value) in fields {
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if let Some((field, field_def)) = self.index_schema.fields.get(&field_name) {
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match field_def {
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FieldDef::Text { .. } => {
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doc.add_text(*field, &field_value);
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}
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FieldDef::Numeric { precision, .. } => match precision {
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NumericType::I64 => {
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if let Ok(v) = field_value.parse::<i64>() {
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doc.add_i64(*field, v);
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}
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}
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NumericType::U64 => {
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if let Ok(v) = field_value.parse::<u64>() {
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doc.add_u64(*field, v);
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}
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}
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NumericType::F64 => {
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if let Ok(v) = field_value.parse::<f64>() {
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doc.add_f64(*field, v);
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}
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}
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NumericType::Date => {
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if let Ok(v) = field_value.parse::<i64>() {
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doc.add_date(*field, DateTime::from_timestamp_millis(v));
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}
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}
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},
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FieldDef::Tag {
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separator,
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case_sensitive,
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..
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} => {
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let tags = if !case_sensitive {
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field_value.to_lowercase()
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} else {
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field_value.clone()
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};
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for tag in tags.split(separator.as_str()) {
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doc.add_text(*field, tag.trim());
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}
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}
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FieldDef::Geo { .. } => {
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let parts: Vec<&str> = field_value.split(',').collect();
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if parts.len() == 2 {
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if let (Ok(lat), Ok(lon)) =
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(parts[0].parse::<f64>(), parts[1].parse::<f64>())
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{
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if let Some((lat_field, _)) =
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self.index_schema.fields.get(&format!("{}_lat", field_name))
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{
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doc.add_f64(*lat_field, lat);
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}
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if let Some((lon_field, _)) =
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self.index_schema.fields.get(&format!("{}_lon", field_name))
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{
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doc.add_f64(*lon_field, lon);
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}
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}
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}
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}
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}
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}
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}
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writer
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.add_document(doc)
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.map_err(|e| DBError(format!("Failed to add document: {}", e)))?;
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writer
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.commit()
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.map_err(|e| DBError(format!("Failed to commit: {}", e)))?;
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Ok(())
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}
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pub fn search_with_options(
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&self,
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query_str: &str,
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options: SearchOptions,
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) -> Result<SearchResults, DBError> {
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let searcher = self.reader.searcher();
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// Ensure we have searchable fields
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if self.index_schema.default_search_fields.is_empty() {
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return Err(DBError("No searchable fields defined in schema".to_string()));
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}
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// Parse query based on search fields
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let query_parser = QueryParser::for_index(
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&self.index,
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self.index_schema.default_search_fields.clone(),
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);
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let parsed_query = query_parser
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.parse_query(query_str)
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.map_err(|e| DBError(format!("Failed to parse query: {}", e)))?;
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let mut clauses: Vec<(Occur, Box<dyn Query>)> = vec![(Occur::Must, parsed_query)];
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// Apply filters if any
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for filter in options.filters {
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if let Some((field, field_def)) = self.index_schema.fields.get(&filter.field) {
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match filter.filter_type {
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FilterType::Equals(value) => {
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match field_def {
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FieldDef::Text { .. } | FieldDef::Tag { .. } => {
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let term_query =
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TermQuery::new(Term::from_field_text(*field, &value), IndexRecordOption::Basic);
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clauses.push((Occur::Must, Box::new(term_query)));
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}
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FieldDef::Numeric { precision, .. } => {
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// Equals on numeric fields: parse to the right numeric type and use term query
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match precision {
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NumericType::I64 => {
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if let Ok(v) = value.parse::<i64>() {
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let term = Term::from_field_i64(*field, v);
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let tq = TermQuery::new(term, IndexRecordOption::Basic);
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clauses.push((Occur::Must, Box::new(tq)));
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}
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}
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NumericType::U64 => {
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if let Ok(v) = value.parse::<u64>() {
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let term = Term::from_field_u64(*field, v);
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let tq = TermQuery::new(term, IndexRecordOption::Basic);
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clauses.push((Occur::Must, Box::new(tq)));
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}
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}
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NumericType::F64 => {
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if let Ok(v) = value.parse::<f64>() {
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let term = Term::from_field_f64(*field, v);
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let tq = TermQuery::new(term, IndexRecordOption::Basic);
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clauses.push((Occur::Must, Box::new(tq)));
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}
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}
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NumericType::Date => {
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if let Ok(v) = value.parse::<i64>() {
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let dt = DateTime::from_timestamp_millis(v);
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let term = Term::from_field_date(*field, dt);
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let tq = TermQuery::new(term, IndexRecordOption::Basic);
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clauses.push((Occur::Must, Box::new(tq)));
|
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}
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||||
}
|
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}
|
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}
|
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FieldDef::Geo { .. } => {
|
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// Geo equals isn't supported in this simplified version
|
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}
|
||||
}
|
||||
}
|
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FilterType::Range { .. } => {
|
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// TODO: Implement numeric range queries by building a RangeQuery per type
|
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}
|
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FilterType::InSet(values) => {
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// OR across values
|
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let mut sub_clauses: Vec<(Occur, Box<dyn Query>)> = vec![];
|
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for value in values {
|
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let term_query = TermQuery::new(
|
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Term::from_field_text(*field, &value),
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IndexRecordOption::Basic,
|
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);
|
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sub_clauses.push((Occur::Should, Box::new(term_query)));
|
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}
|
||||
clauses.push((Occur::Must, Box::new(BooleanQuery::new(sub_clauses))));
|
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}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let final_query: Box<dyn Query> = if clauses.len() == 1 {
|
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clauses.pop().unwrap().1
|
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} else {
|
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Box::new(BooleanQuery::new(clauses))
|
||||
};
|
||||
|
||||
// Execute search
|
||||
let top_docs = searcher
|
||||
.search(&*final_query, &TopDocs::with_limit(options.limit + options.offset))
|
||||
.map_err(|e| DBError(format!("Search failed: {}", e)))?;
|
||||
let total_hits = top_docs.len();
|
||||
let mut documents = Vec::new();
|
||||
|
||||
for (score, doc_address) in top_docs.into_iter().skip(options.offset).take(options.limit) {
|
||||
let retrieved_doc: TantivyDocument = searcher
|
||||
.doc(doc_address)
|
||||
.map_err(|e| DBError(format!("Failed to retrieve doc: {}", e)))?;
|
||||
|
||||
let mut doc_fields = HashMap::new();
|
||||
|
||||
// Extract stored fields (or synthesize)
|
||||
for (field_name, (field, field_def)) in &self.index_schema.fields {
|
||||
match field_def {
|
||||
FieldDef::Text { stored, .. } | FieldDef::Tag { stored, .. } => {
|
||||
if *stored {
|
||||
if let Some(value) = retrieved_doc.get_first(*field) {
|
||||
if let Some(text) = value.as_str() {
|
||||
doc_fields.insert(field_name.clone(), text.to_string());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
FieldDef::Numeric {
|
||||
stored, precision, ..
|
||||
} => {
|
||||
if *stored {
|
||||
let value_str = match precision {
|
||||
NumericType::I64 => retrieved_doc
|
||||
.get_first(*field)
|
||||
.and_then(|v| v.as_i64())
|
||||
.map(|v| v.to_string()),
|
||||
NumericType::U64 => retrieved_doc
|
||||
.get_first(*field)
|
||||
.and_then(|v| v.as_u64())
|
||||
.map(|v| v.to_string()),
|
||||
NumericType::F64 => retrieved_doc
|
||||
.get_first(*field)
|
||||
.and_then(|v| v.as_f64())
|
||||
.map(|v| v.to_string()),
|
||||
NumericType::Date => retrieved_doc
|
||||
.get_first(*field)
|
||||
.and_then(|v| v.as_datetime())
|
||||
.map(|v| v.into_timestamp_millis().to_string()),
|
||||
};
|
||||
if let Some(v) = value_str {
|
||||
doc_fields.insert(field_name.clone(), v);
|
||||
}
|
||||
}
|
||||
}
|
||||
FieldDef::Geo { stored } => {
|
||||
if *stored {
|
||||
let lat_field = self
|
||||
.index_schema
|
||||
.fields
|
||||
.get(&format!("{}_lat", field_name))
|
||||
.unwrap()
|
||||
.0;
|
||||
let lon_field = self
|
||||
.index_schema
|
||||
.fields
|
||||
.get(&format!("{}_lon", field_name))
|
||||
.unwrap()
|
||||
.0;
|
||||
let lat = retrieved_doc.get_first(lat_field).and_then(|v| v.as_f64());
|
||||
let lon = retrieved_doc.get_first(lon_field).and_then(|v| v.as_f64());
|
||||
if let (Some(lat), Some(lon)) = (lat, lon) {
|
||||
doc_fields.insert(field_name.clone(), format!("{},{}", lat, lon));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
documents.push(SearchDocument {
|
||||
fields: doc_fields,
|
||||
score,
|
||||
});
|
||||
}
|
||||
|
||||
Ok(SearchResults {
|
||||
total: total_hits,
|
||||
documents,
|
||||
})
|
||||
}
|
||||
|
||||
pub fn get_info(&self) -> Result<IndexInfo, DBError> {
|
||||
let searcher = self.reader.searcher();
|
||||
let num_docs = searcher.num_docs();
|
||||
let fields_info: Vec<FieldInfo> = self
|
||||
.index_schema
|
||||
.fields
|
||||
.iter()
|
||||
.map(|(name, (_, def))| FieldInfo {
|
||||
name: name.clone(),
|
||||
field_type: format!("{:?}", def),
|
||||
})
|
||||
.collect();
|
||||
Ok(IndexInfo {
|
||||
name: self.name.clone(),
|
||||
num_docs,
|
||||
fields: fields_info,
|
||||
config: self.config.clone(),
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone)]
|
||||
pub struct SearchOptions {
|
||||
pub limit: usize,
|
||||
pub offset: usize,
|
||||
pub filters: Vec<Filter>,
|
||||
pub sort_by: Option<String>,
|
||||
pub return_fields: Option<Vec<String>>,
|
||||
pub highlight: bool,
|
||||
}
|
||||
|
||||
impl Default for SearchOptions {
|
||||
fn default() -> Self {
|
||||
SearchOptions {
|
||||
limit: 10,
|
||||
offset: 0,
|
||||
filters: vec![],
|
||||
sort_by: None,
|
||||
return_fields: None,
|
||||
highlight: false,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone)]
|
||||
pub struct Filter {
|
||||
pub field: String,
|
||||
pub filter_type: FilterType,
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone)]
|
||||
pub enum FilterType {
|
||||
Equals(String),
|
||||
Range { min: String, max: String },
|
||||
InSet(Vec<String>),
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct SearchResults {
|
||||
pub total: usize,
|
||||
pub documents: Vec<SearchDocument>,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct SearchDocument {
|
||||
pub fields: HashMap<String, String>,
|
||||
pub score: f32,
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
pub struct IndexInfo {
|
||||
pub name: String,
|
||||
pub num_docs: u64,
|
||||
pub fields: Vec<FieldInfo>,
|
||||
pub config: IndexConfig,
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
pub struct FieldInfo {
|
||||
pub name: String,
|
||||
pub field_type: String,
|
||||
}
|
||||
Reference in New Issue
Block a user