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| </pre><pre class="rust"><code><span class="kw">use </span>std::collections::HashMap; |
| |
| <span class="kw">use </span>tantivy_fst::raw::CompiledAddr; |
| <span class="kw">use </span>tantivy_fst::{Automaton, Map}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::query::score_combiner::DoNothingCombiner; |
| <span class="kw">use </span><span class="kw">crate</span>::query::{AutomatonWeight, BooleanWeight, EnableScoring, Occur, Query, Weight}; |
| <span class="kw">use </span><span class="kw">crate</span>::schema::{Field, Schema}; |
| <span class="kw">use </span><span class="kw">crate</span>::Term; |
| |
| <span class="doccomment">/// A Term Set Query matches all of the documents containing any of the Term provided |
| </span><span class="attribute">#[derive(Debug, Clone)] |
| </span><span class="kw">pub struct </span>TermSetQuery { |
| terms_map: HashMap<Field, Vec<Term>>, |
| } |
| |
| <span class="kw">impl </span>TermSetQuery { |
| <span class="doccomment">/// Create a Term Set Query |
| </span><span class="kw">pub fn </span>new<T: IntoIterator<Item = Term>>(terms: T) -> <span class="self">Self </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>terms_map: HashMap<<span class="kw">_</span>, Vec<<span class="kw">_</span>>> = HashMap::new(); |
| <span class="kw">for </span>term <span class="kw">in </span>terms { |
| terms_map.entry(term.field()).or_default().push(term); |
| } |
| |
| <span class="kw">for </span>terms <span class="kw">in </span>terms_map.values_mut() { |
| terms.sort_unstable(); |
| terms.dedup(); |
| } |
| |
| TermSetQuery { terms_map } |
| } |
| |
| <span class="kw">fn </span>specialized_weight( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| schema: <span class="kw-2">&</span>Schema, |
| ) -> <span class="kw">crate</span>::Result<BooleanWeight<DoNothingCombiner>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>sub_queries: Vec<(<span class="kw">_</span>, Box<<span class="kw">dyn </span>Weight>)> = Vec::with_capacity(<span class="self">self</span>.terms_map.len()); |
| |
| <span class="kw">for </span>(<span class="kw-2">&</span>field, sorted_terms) <span class="kw">in </span><span class="self">self</span>.terms_map.iter() { |
| <span class="kw">let </span>field_entry = schema.get_field_entry(field); |
| <span class="kw">let </span>field_type = field_entry.field_type(); |
| <span class="kw">if </span>!field_type.is_indexed() { |
| <span class="kw">let </span>error_msg = <span class="macro">format!</span>(<span class="string">"Field {:?} is not indexed."</span>, field_entry.name()); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(<span class="kw">crate</span>::TantivyError::SchemaError(error_msg)); |
| } |
| |
| <span class="comment">// In practice this won't fail because: |
| // - we are writing to memory, so no IoError |
| // - Terms are ordered |
| </span><span class="kw">let </span>map = Map::from_iter(sorted_terms.iter().map(|key| (key.value_bytes(), <span class="number">0</span>))) |
| .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))<span class="question-mark">?</span>; |
| |
| sub_queries.push(( |
| Occur::Should, |
| Box::new(AutomatonWeight::new(field, SetDfaWrapper(map))), |
| )); |
| } |
| |
| <span class="prelude-val">Ok</span>(BooleanWeight::new( |
| sub_queries, |
| <span class="bool-val">false</span>, |
| Box::new(|| DoNothingCombiner), |
| )) |
| } |
| } |
| |
| <span class="kw">impl </span>Query <span class="kw">for </span>TermSetQuery { |
| <span class="kw">fn </span>weight(<span class="kw-2">&</span><span class="self">self</span>, enable_scoring: EnableScoring<<span class="lifetime">'_</span>>) -> <span class="kw">crate</span>::Result<Box<<span class="kw">dyn </span>Weight>> { |
| <span class="prelude-val">Ok</span>(Box::new(<span class="self">self</span>.specialized_weight(enable_scoring.schema())<span class="question-mark">?</span>)) |
| } |
| } |
| |
| <span class="kw">struct </span>SetDfaWrapper(Map<Vec<u8>>); |
| |
| <span class="kw">impl </span>Automaton <span class="kw">for </span>SetDfaWrapper { |
| <span class="kw">type </span>State = <span class="prelude-ty">Option</span><CompiledAddr>; |
| |
| <span class="kw">fn </span>start(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><CompiledAddr> { |
| <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="number">0</span>.as_ref().root().addr()) |
| } |
| |
| <span class="kw">fn </span>is_match(<span class="kw-2">&</span><span class="self">self</span>, state_opt: <span class="kw-2">&</span><span class="prelude-ty">Option</span><CompiledAddr>) -> bool { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(state) = state_opt { |
| <span class="self">self</span>.<span class="number">0</span>.as_ref().node(<span class="kw-2">*</span>state).is_final() |
| } <span class="kw">else </span>{ |
| <span class="bool-val">false |
| </span>} |
| } |
| |
| <span class="kw">fn </span>accept(<span class="kw-2">&</span><span class="self">self</span>, state_opt: <span class="kw-2">&</span><span class="prelude-ty">Option</span><CompiledAddr>, byte: u8) -> <span class="prelude-ty">Option</span><CompiledAddr> { |
| <span class="kw">let </span>state = state_opt.as_ref()<span class="question-mark">?</span>; |
| <span class="kw">let </span>node = <span class="self">self</span>.<span class="number">0</span>.as_ref().node(<span class="kw-2">*</span>state); |
| <span class="kw">let </span>transition = node.find_input(byte)<span class="question-mark">?</span>; |
| <span class="prelude-val">Some</span>(node.transition_addr(transition)) |
| } |
| |
| <span class="kw">fn </span>can_match(<span class="kw-2">&</span><span class="self">self</span>, state: <span class="kw-2">&</span><span class="self">Self</span>::State) -> bool { |
| state.is_some() |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span><span class="kw">crate</span>::collector::TopDocs; |
| <span class="kw">use </span><span class="kw">crate</span>::query::{QueryParser, TermSetQuery}; |
| <span class="kw">use </span><span class="kw">crate</span>::schema::{Schema, TEXT}; |
| <span class="kw">use crate</span>::{assert_nearly_equals, Index, Term}; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">pub fn </span>test_term_set_query() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder(); |
| <span class="kw">let </span>field1 = schema_builder.add_text_field(<span class="string">"field1"</span>, TEXT); |
| <span class="kw">let </span>field2 = schema_builder.add_text_field(<span class="string">"field2"</span>, TEXT); |
| <span class="kw">let </span>schema = schema_builder.build(); |
| <span class="kw">let </span>index = Index::create_in_ram(schema); |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>index_writer = index.writer_for_tests()<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>( |
| field1 => <span class="string">"doc1"</span>, |
| field2 => <span class="string">"val1"</span>, |
| ))<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>( |
| field1 => <span class="string">"doc2"</span>, |
| field2 => <span class="string">"val2"</span>, |
| ))<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>( |
| field1 => <span class="string">"doc3"</span>, |
| field2 => <span class="string">"val3"</span>, |
| ))<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>( |
| field1 => <span class="string">"val3"</span>, |
| field2 => <span class="string">"doc3"</span>, |
| ))<span class="question-mark">?</span>; |
| index_writer.commit()<span class="question-mark">?</span>; |
| } |
| <span class="kw">let </span>reader = index.reader()<span class="question-mark">?</span>; |
| <span class="kw">let </span>searcher = reader.searcher(); |
| |
| { |
| <span class="comment">// single element |
| </span><span class="kw">let </span>terms = <span class="macro">vec!</span>[Term::from_field_text(field1, <span class="string">"doc1"</span>)]; |
| |
| <span class="kw">let </span>term_set_query = TermSetQuery::new(terms); |
| <span class="kw">let </span>top_docs = searcher.search(<span class="kw-2">&</span>term_set_query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">2</span>))<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(top_docs.len(), <span class="number">1</span>, <span class="string">"Expected 1 document"</span>); |
| <span class="kw">let </span>(score, <span class="kw">_</span>) = top_docs[<span class="number">0</span>]; |
| <span class="macro">assert_nearly_equals!</span>(<span class="number">1.0</span>, score); |
| } |
| |
| { |
| <span class="comment">// single element, absent |
| </span><span class="kw">let </span>terms = <span class="macro">vec!</span>[Term::from_field_text(field1, <span class="string">"doc4"</span>)]; |
| |
| <span class="kw">let </span>term_set_query = TermSetQuery::new(terms); |
| <span class="kw">let </span>top_docs = searcher.search(<span class="kw-2">&</span>term_set_query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">1</span>))<span class="question-mark">?</span>; |
| <span class="macro">assert!</span>(top_docs.is_empty(), <span class="string">"Expected 0 document"</span>); |
| } |
| |
| { |
| <span class="comment">// multiple elements |
| </span><span class="kw">let </span>terms = <span class="macro">vec!</span>[ |
| Term::from_field_text(field1, <span class="string">"doc1"</span>), |
| Term::from_field_text(field1, <span class="string">"doc2"</span>), |
| ]; |
| |
| <span class="kw">let </span>term_set_query = TermSetQuery::new(terms); |
| <span class="kw">let </span>top_docs = searcher.search(<span class="kw-2">&</span>term_set_query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">2</span>))<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(top_docs.len(), <span class="number">2</span>, <span class="string">"Expected 2 documents"</span>); |
| <span class="kw">for </span>(score, <span class="kw">_</span>) <span class="kw">in </span>top_docs { |
| <span class="macro">assert_nearly_equals!</span>(<span class="number">1.0</span>, score); |
| } |
| } |
| |
| { |
| <span class="comment">// multiple elements, mixed fields |
| </span><span class="kw">let </span>terms = <span class="macro">vec!</span>[ |
| Term::from_field_text(field1, <span class="string">"doc1"</span>), |
| Term::from_field_text(field1, <span class="string">"doc1"</span>), |
| Term::from_field_text(field2, <span class="string">"val2"</span>), |
| ]; |
| |
| <span class="kw">let </span>term_set_query = TermSetQuery::new(terms); |
| <span class="kw">let </span>top_docs = searcher.search(<span class="kw-2">&</span>term_set_query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">3</span>))<span class="question-mark">?</span>; |
| |
| <span class="macro">assert_eq!</span>(top_docs.len(), <span class="number">2</span>, <span class="string">"Expected 2 document"</span>); |
| <span class="kw">for </span>(score, <span class="kw">_</span>) <span class="kw">in </span>top_docs { |
| <span class="macro">assert_nearly_equals!</span>(<span class="number">1.0</span>, score); |
| } |
| } |
| |
| { |
| <span class="comment">// no field crosstalk |
| </span><span class="kw">let </span>terms = <span class="macro">vec!</span>[Term::from_field_text(field1, <span class="string">"doc3"</span>)]; |
| |
| <span class="kw">let </span>term_set_query = TermSetQuery::new(terms); |
| <span class="kw">let </span>top_docs = searcher.search(<span class="kw-2">&</span>term_set_query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">3</span>))<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(top_docs.len(), <span class="number">1</span>, <span class="string">"Expected 1 document"</span>); |
| |
| <span class="kw">let </span>terms = <span class="macro">vec!</span>[Term::from_field_text(field2, <span class="string">"doc3"</span>)]; |
| |
| <span class="kw">let </span>term_set_query = TermSetQuery::new(terms); |
| <span class="kw">let </span>top_docs = searcher.search(<span class="kw-2">&</span>term_set_query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">3</span>))<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(top_docs.len(), <span class="number">1</span>, <span class="string">"Expected 1 document"</span>); |
| |
| <span class="kw">let </span>terms = <span class="macro">vec!</span>[ |
| Term::from_field_text(field1, <span class="string">"doc3"</span>), |
| Term::from_field_text(field2, <span class="string">"doc3"</span>), |
| ]; |
| |
| <span class="kw">let </span>term_set_query = TermSetQuery::new(terms); |
| <span class="kw">let </span>top_docs = searcher.search(<span class="kw-2">&</span>term_set_query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">3</span>))<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(top_docs.len(), <span class="number">2</span>, <span class="string">"Expected 2 document"</span>); |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_term_set_query_parser() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder(); |
| schema_builder.add_text_field(<span class="string">"field"</span>, TEXT); |
| <span class="kw">let </span>schema = schema_builder.build(); |
| <span class="kw">let </span>index = Index::create_in_ram(schema.clone()); |
| <span class="kw">let </span><span class="kw-2">mut </span>index_writer = index.writer_for_tests()<span class="question-mark">?</span>; |
| <span class="kw">let </span>field = schema.get_field(<span class="string">"field"</span>).unwrap(); |
| index_writer.add_document(<span class="macro">doc!</span>( |
| field => <span class="string">"val1"</span>, |
| ))<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>( |
| field => <span class="string">"val2"</span>, |
| ))<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>( |
| field => <span class="string">"val3"</span>, |
| ))<span class="question-mark">?</span>; |
| index_writer.commit()<span class="question-mark">?</span>; |
| <span class="kw">let </span>reader = index.reader()<span class="question-mark">?</span>; |
| <span class="kw">let </span>searcher = reader.searcher(); |
| <span class="kw">let </span>query_parser = QueryParser::for_index(<span class="kw-2">&</span>index, <span class="macro">vec!</span>[]); |
| <span class="kw">let </span>query = query_parser.parse_query(<span class="string">"field: IN [val1 val2]"</span>)<span class="question-mark">?</span>; |
| <span class="kw">let </span>top_docs = searcher.search(<span class="kw-2">&</span>query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">3</span>))<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(top_docs.len(), <span class="number">2</span>); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tantivy" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
