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</pre><pre class="rust"><code><span class="kw">use </span><span class="kw">super</span>::boolean_weight::BooleanWeight;
<span class="kw">use </span><span class="kw">crate</span>::query::{EnableScoring, Occur, Query, SumWithCoordsCombiner, TermQuery, Weight};
<span class="kw">use </span><span class="kw">crate</span>::schema::{IndexRecordOption, Term};
<span class="doccomment">/// The boolean query returns a set of documents
/// that matches the Boolean combination of constituent subqueries.
///
/// The documents matched by the boolean query are
/// those which
/// * match all of the sub queries associated with the
/// `Must` occurrence
/// * match none of the sub queries associated with the
/// `MustNot` occurrence.
/// * match at least one of the subqueries that is not
/// a `MustNot` occurrence.
///
///
/// You can combine other query types and their `Occur`ances into one `BooleanQuery`
///
/// ```rust
/// use tantivy::collector::Count;
/// use tantivy::doc;
/// use tantivy::query::{BooleanQuery, Occur, PhraseQuery, Query, TermQuery};
/// use tantivy::schema::{IndexRecordOption, Schema, TEXT};
/// use tantivy::Term;
/// use tantivy::Index;
///
/// fn main() -&gt; tantivy::Result&lt;()&gt; {
/// let mut schema_builder = Schema::builder();
/// let title = schema_builder.add_text_field(&quot;title&quot;, TEXT);
/// let body = schema_builder.add_text_field(&quot;body&quot;, TEXT);
/// let schema = schema_builder.build();
/// let index = Index::create_in_ram(schema);
/// {
/// let mut index_writer = index.writer(3_000_000)?;
/// index_writer.add_document(doc!(
/// title =&gt; &quot;The Name of the Wind&quot;,
/// ))?;
/// index_writer.add_document(doc!(
/// title =&gt; &quot;The Diary of Muadib&quot;,
/// ))?;
/// index_writer.add_document(doc!(
/// title =&gt; &quot;A Dairy Cow&quot;,
/// body =&gt; &quot;hidden&quot;,
/// ))?;
/// index_writer.add_document(doc!(
/// title =&gt; &quot;A Dairy Cow&quot;,
/// body =&gt; &quot;found&quot;,
/// ))?;
/// index_writer.add_document(doc!(
/// title =&gt; &quot;The Diary of a Young Girl&quot;,
/// ))?;
/// index_writer.commit()?;
/// }
///
/// let reader = index.reader()?;
/// let searcher = reader.searcher();
///
/// // Make TermQuery&#39;s for &quot;girl&quot; and &quot;diary&quot; in the title
/// let girl_term_query: Box&lt;dyn Query&gt; = Box::new(TermQuery::new(
/// Term::from_field_text(title, &quot;girl&quot;),
/// IndexRecordOption::Basic,
/// ));
/// let diary_term_query: Box&lt;dyn Query&gt; = Box::new(TermQuery::new(
/// Term::from_field_text(title, &quot;diary&quot;),
/// IndexRecordOption::Basic,
/// ));
/// // A TermQuery with &quot;found&quot; in the body
/// let body_term_query: Box&lt;dyn Query&gt; = Box::new(TermQuery::new(
/// Term::from_field_text(body, &quot;found&quot;),
/// IndexRecordOption::Basic,
/// ));
/// // TermQuery &quot;diary&quot; must and &quot;girl&quot; must not be present
/// let queries_with_occurs1 = vec![
/// (Occur::Must, diary_term_query.box_clone()),
/// (Occur::MustNot, girl_term_query),
/// ];
/// // Make a BooleanQuery equivalent to
/// // title:+diary title:-girl
/// let diary_must_and_girl_mustnot = BooleanQuery::new(queries_with_occurs1);
/// let count1 = searcher.search(&amp;diary_must_and_girl_mustnot, &amp;Count)?;
/// assert_eq!(count1, 1);
///
/// // TermQuery for &quot;cow&quot; in the title
/// let cow_term_query: Box&lt;dyn Query&gt; = Box::new(TermQuery::new(
/// Term::from_field_text(title, &quot;cow&quot;),
/// IndexRecordOption::Basic,
/// ));
/// // &quot;title:diary OR title:cow&quot;
/// let title_diary_or_cow = BooleanQuery::new(vec![
/// (Occur::Should, diary_term_query.box_clone()),
/// (Occur::Should, cow_term_query),
/// ]);
/// let count2 = searcher.search(&amp;title_diary_or_cow, &amp;Count)?;
/// assert_eq!(count2, 4);
///
/// // Make a `PhraseQuery` from a vector of `Term`s
/// let phrase_query: Box&lt;dyn Query&gt; = Box::new(PhraseQuery::new(vec![
/// Term::from_field_text(title, &quot;dairy&quot;),
/// Term::from_field_text(title, &quot;cow&quot;),
/// ]));
/// // You can combine subqueries of different types into 1 BooleanQuery:
/// // `TermQuery` and `PhraseQuery`
/// // &quot;title:diary OR &quot;dairy cow&quot;
/// let term_of_phrase_query = BooleanQuery::new(vec![
/// (Occur::Should, diary_term_query.box_clone()),
/// (Occur::Should, phrase_query.box_clone()),
/// ]);
/// let count3 = searcher.search(&amp;term_of_phrase_query, &amp;Count)?;
/// assert_eq!(count3, 4);
///
/// // You can nest one BooleanQuery inside another
/// // body:found AND (&quot;title:diary OR &quot;dairy cow&quot;)
/// let nested_query = BooleanQuery::new(vec![
/// (Occur::Must, body_term_query),
/// (Occur::Must, Box::new(term_of_phrase_query))
/// ]);
/// let count4 = searcher.search(&amp;nested_query, &amp;Count)?;
/// assert_eq!(count4, 1);
/// Ok(())
/// }
/// ```
</span><span class="attribute">#[derive(Debug)]
</span><span class="kw">pub struct </span>BooleanQuery {
subqueries: Vec&lt;(Occur, Box&lt;<span class="kw">dyn </span>Query&gt;)&gt;,
}
<span class="kw">impl </span>Clone <span class="kw">for </span>BooleanQuery {
<span class="kw">fn </span>clone(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="self">Self </span>{
<span class="self">self</span>.subqueries
.iter()
.map(|(occur, subquery)| (<span class="kw-2">*</span>occur, subquery.box_clone()))
.collect::&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;()
.into()
}
}
<span class="kw">impl </span>From&lt;Vec&lt;(Occur, Box&lt;<span class="kw">dyn </span>Query&gt;)&gt;&gt; <span class="kw">for </span>BooleanQuery {
<span class="kw">fn </span>from(subqueries: Vec&lt;(Occur, Box&lt;<span class="kw">dyn </span>Query&gt;)&gt;) -&gt; BooleanQuery {
BooleanQuery::new(subqueries)
}
}
<span class="kw">impl </span>Query <span class="kw">for </span>BooleanQuery {
<span class="kw">fn </span>weight(<span class="kw-2">&amp;</span><span class="self">self</span>, enable_scoring: EnableScoring&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; <span class="kw">crate</span>::Result&lt;Box&lt;<span class="kw">dyn </span>Weight&gt;&gt; {
<span class="kw">let </span>sub_weights = <span class="self">self
</span>.subqueries
.iter()
.map(|<span class="kw-2">&amp;</span>(<span class="kw-2">ref </span>occur, <span class="kw-2">ref </span>subquery)| <span class="prelude-val">Ok</span>((<span class="kw-2">*</span>occur, subquery.weight(enable_scoring)<span class="question-mark">?</span>)))
.collect::&lt;<span class="kw">crate</span>::Result&lt;<span class="kw">_</span>&gt;&gt;()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(Box::new(BooleanWeight::new(
sub_weights,
enable_scoring.is_scoring_enabled(),
Box::new(SumWithCoordsCombiner::default),
)))
}
<span class="kw">fn </span>query_terms&lt;<span class="lifetime">&#39;a</span>&gt;(<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span><span class="self">self</span>, visitor: <span class="kw-2">&amp;mut </span><span class="kw">dyn </span>FnMut(<span class="kw-2">&amp;</span><span class="lifetime">&#39;a </span>Term, bool)) {
<span class="kw">for </span>(_occur, subquery) <span class="kw">in </span><span class="kw-2">&amp;</span><span class="self">self</span>.subqueries {
subquery.query_terms(visitor);
}
}
}
<span class="kw">impl </span>BooleanQuery {
<span class="doccomment">/// Creates a new boolean query.
</span><span class="kw">pub fn </span>new(subqueries: Vec&lt;(Occur, Box&lt;<span class="kw">dyn </span>Query&gt;)&gt;) -&gt; BooleanQuery {
BooleanQuery { subqueries }
}
<span class="doccomment">/// Returns the intersection of the queries.
</span><span class="kw">pub fn </span>intersection(queries: Vec&lt;Box&lt;<span class="kw">dyn </span>Query&gt;&gt;) -&gt; BooleanQuery {
<span class="kw">let </span>subqueries = queries.into_iter().map(|s| (Occur::Must, s)).collect();
BooleanQuery::new(subqueries)
}
<span class="doccomment">/// Returns the union of the queries.
</span><span class="kw">pub fn </span>union(queries: Vec&lt;Box&lt;<span class="kw">dyn </span>Query&gt;&gt;) -&gt; BooleanQuery {
<span class="kw">let </span>subqueries = queries.into_iter().map(|s| (Occur::Should, s)).collect();
BooleanQuery::new(subqueries)
}
<span class="doccomment">/// Helper method to create a boolean query matching a given list of terms.
/// The resulting query is a disjunction of the terms.
</span><span class="kw">pub fn </span>new_multiterms_query(terms: Vec&lt;Term&gt;) -&gt; BooleanQuery {
<span class="kw">let </span>occur_term_queries: Vec&lt;(Occur, Box&lt;<span class="kw">dyn </span>Query&gt;)&gt; = terms
.into_iter()
.map(|term| {
<span class="kw">let </span>term_query: Box&lt;<span class="kw">dyn </span>Query&gt; =
Box::new(TermQuery::new(term, IndexRecordOption::WithFreqs));
(Occur::Should, term_query)
})
.collect();
BooleanQuery::new(occur_term_queries)
}
<span class="doccomment">/// Deconstructed view of the clauses making up this query.
</span><span class="kw">pub fn </span>clauses(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span>[(Occur, Box&lt;<span class="kw">dyn </span>Query&gt;)] {
<span class="kw-2">&amp;</span><span class="self">self</span>.subqueries[..]
}
}
<span class="attribute">#[cfg(test)]
</span><span class="kw">mod </span>tests {
<span class="kw">use </span><span class="kw">super</span>::BooleanQuery;
<span class="kw">use </span><span class="kw">crate</span>::collector::{Count, DocSetCollector};
<span class="kw">use </span><span class="kw">crate</span>::query::{QueryClone, QueryParser, TermQuery};
<span class="kw">use </span><span class="kw">crate</span>::schema::{IndexRecordOption, Schema, TEXT};
<span class="kw">use crate</span>::{DocAddress, Index, Term};
<span class="kw">fn </span>create_test_index() -&gt; <span class="kw">crate</span>::Result&lt;Index&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder();
<span class="kw">let </span>text = schema_builder.add_text_field(<span class="string">&quot;text&quot;</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>writer = index.writer_for_tests()<span class="question-mark">?</span>;
writer.add_document(<span class="macro">doc!</span>(text=&gt;<span class="string">&quot;b c&quot;</span>))<span class="question-mark">?</span>;
writer.add_document(<span class="macro">doc!</span>(text=&gt;<span class="string">&quot;a c&quot;</span>))<span class="question-mark">?</span>;
writer.add_document(<span class="macro">doc!</span>(text=&gt;<span class="string">&quot;a b&quot;</span>))<span class="question-mark">?</span>;
writer.add_document(<span class="macro">doc!</span>(text=&gt;<span class="string">&quot;a d&quot;</span>))<span class="question-mark">?</span>;
writer.commit()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(index)
}
<span class="attribute">#[test]
</span><span class="kw">fn </span>test_union() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
<span class="kw">let </span>index = create_test_index()<span class="question-mark">?</span>;
<span class="kw">let </span>searcher = index.reader()<span class="question-mark">?</span>.searcher();
<span class="kw">let </span>text = index.schema().get_field(<span class="string">&quot;text&quot;</span>).unwrap();
<span class="kw">let </span>term_a = TermQuery::new(Term::from_field_text(text, <span class="string">&quot;a&quot;</span>), IndexRecordOption::Basic);
<span class="kw">let </span>term_d = TermQuery::new(Term::from_field_text(text, <span class="string">&quot;d&quot;</span>), IndexRecordOption::Basic);
<span class="kw">let </span>union_ad = BooleanQuery::union(<span class="macro">vec!</span>[term_a.box_clone(), term_d.box_clone()]);
<span class="kw">let </span>docs = searcher.search(<span class="kw-2">&amp;</span>union_ad, <span class="kw-2">&amp;</span>DocSetCollector)<span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(
docs,
<span class="macro">vec!</span>[
DocAddress::new(<span class="number">0u32</span>, <span class="number">1u32</span>),
DocAddress::new(<span class="number">0u32</span>, <span class="number">2u32</span>),
DocAddress::new(<span class="number">0u32</span>, <span class="number">3u32</span>)
]
.into_iter()
.collect()
);
<span class="prelude-val">Ok</span>(())
}
<span class="attribute">#[test]
</span><span class="kw">fn </span>test_intersection() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
<span class="kw">let </span>index = create_test_index()<span class="question-mark">?</span>;
<span class="kw">let </span>searcher = index.reader()<span class="question-mark">?</span>.searcher();
<span class="kw">let </span>text = index.schema().get_field(<span class="string">&quot;text&quot;</span>).unwrap();
<span class="kw">let </span>term_a = TermQuery::new(Term::from_field_text(text, <span class="string">&quot;a&quot;</span>), IndexRecordOption::Basic);
<span class="kw">let </span>term_b = TermQuery::new(Term::from_field_text(text, <span class="string">&quot;b&quot;</span>), IndexRecordOption::Basic);
<span class="kw">let </span>term_c = TermQuery::new(Term::from_field_text(text, <span class="string">&quot;c&quot;</span>), IndexRecordOption::Basic);
<span class="kw">let </span>intersection_ab =
BooleanQuery::intersection(<span class="macro">vec!</span>[term_a.box_clone(), term_b.box_clone()]);
<span class="kw">let </span>intersection_ac =
BooleanQuery::intersection(<span class="macro">vec!</span>[term_a.box_clone(), term_c.box_clone()]);
<span class="kw">let </span>intersection_bc =
BooleanQuery::intersection(<span class="macro">vec!</span>[term_b.box_clone(), term_c.box_clone()]);
{
<span class="kw">let </span>docs = searcher.search(<span class="kw-2">&amp;</span>intersection_ab, <span class="kw-2">&amp;</span>DocSetCollector)<span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(
docs,
<span class="macro">vec!</span>[DocAddress::new(<span class="number">0u32</span>, <span class="number">2u32</span>)].into_iter().collect()
);
}
{
<span class="kw">let </span>docs = searcher.search(<span class="kw-2">&amp;</span>intersection_ac, <span class="kw-2">&amp;</span>DocSetCollector)<span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(
docs,
<span class="macro">vec!</span>[DocAddress::new(<span class="number">0u32</span>, <span class="number">1u32</span>)].into_iter().collect()
);
}
{
<span class="kw">let </span>docs = searcher.search(<span class="kw-2">&amp;</span>intersection_bc, <span class="kw-2">&amp;</span>DocSetCollector)<span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(
docs,
<span class="macro">vec!</span>[DocAddress::new(<span class="number">0u32</span>, <span class="number">0u32</span>)].into_iter().collect()
);
}
<span class="prelude-val">Ok</span>(())
}
<span class="attribute">#[test]
</span><span class="kw">pub fn </span>test_json_array_pitfall_bag_of_terms() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder();
<span class="kw">let </span>json_field = schema_builder.add_json_field(<span class="string">&quot;json&quot;</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>(json_field=&gt;<span class="macro">json!</span>({
<span class="string">&quot;cart&quot;</span>: [
{<span class="string">&quot;product_type&quot;</span>: <span class="string">&quot;sneakers&quot;</span>, <span class="string">&quot;attributes&quot;</span>: {<span class="string">&quot;color&quot;</span>: <span class="string">&quot;white&quot;</span>}},
{<span class="string">&quot;product_type&quot;</span>: <span class="string">&quot;t-shirt&quot;</span>, <span class="string">&quot;attributes&quot;</span>: {<span class="string">&quot;color&quot;</span>: <span class="string">&quot;red&quot;</span>}},
{<span class="string">&quot;product_type&quot;</span>: <span class="string">&quot;cd&quot;</span>, <span class="string">&quot;attributes&quot;</span>: {<span class="string">&quot;genre&quot;</span>: <span class="string">&quot;blues&quot;</span>}},
]
})))<span class="question-mark">?</span>;
index_writer.commit()<span class="question-mark">?</span>;
}
<span class="kw">let </span>searcher = index.reader()<span class="question-mark">?</span>.searcher();
<span class="kw">let </span>doc_matches = |query: <span class="kw-2">&amp;</span>str| {
<span class="kw">let </span>query_parser = QueryParser::for_index(<span class="kw-2">&amp;</span>index, <span class="macro">vec!</span>[json_field]);
<span class="kw">let </span>query = query_parser.parse_query(query).unwrap();
searcher.search(<span class="kw-2">&amp;</span>query, <span class="kw-2">&amp;</span>Count).unwrap() == <span class="number">1
</span>};
<span class="comment">// As expected
</span><span class="macro">assert!</span>(doc_matches(
<span class="string">r#&quot;cart.product_type:sneakers AND cart.attributes.color:white&quot;#
</span>));
<span class="comment">// Unexpected match, due to the fact that array do not act as nested docs.
</span><span class="macro">assert!</span>(doc_matches(
<span class="string">r#&quot;cart.product_type:sneakers AND cart.attributes.color:red&quot;#
</span>));
<span class="comment">// However, bviously this works...
</span><span class="macro">assert!</span>(!doc_matches(
<span class="string">r#&quot;cart.product_type:sneakers AND cart.attributes.color:blues&quot;#
</span>));
<span class="prelude-val">Ok</span>(())
}
}
</code></pre></div>
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