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https://github.com/quickwit-oss/tantivy.git
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63c66005db
* Refactoring of the score tweaker into `SortKeyComputer`s to unlock two features. - Allow lazy evaluation of score. As soon as we identified that a doc won't reach the topK threshold, we can stop the evaluation. - Allow for a different segment level score, segment level score and their conversion. This PR breaks public API, but fixing code is straightforward. * Bumping tantivy version --------- Co-authored-by: Paul Masurel <paul.masurel@datadoghq.com>
84 lines
3.3 KiB
Rust
84 lines
3.3 KiB
Rust
use tantivy::collector::TopDocs;
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use tantivy::query::QueryParser;
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use tantivy::schema::*;
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use tantivy::{doc, Index, IndexWriter, ReloadPolicy, Result};
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use tempfile::TempDir;
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fn main() -> Result<()> {
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let index_path = TempDir::new()?;
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let mut schema_builder = Schema::builder();
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schema_builder.add_text_field("title", TEXT | STORED);
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schema_builder.add_text_field("body", TEXT);
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let schema = schema_builder.build();
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let title = schema.get_field("title").unwrap();
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let body = schema.get_field("body").unwrap();
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let index = Index::create_in_dir(&index_path, schema)?;
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let mut index_writer: IndexWriter = index.writer(50_000_000)?;
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index_writer.add_document(doc!(
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title => "The Old Man and the Sea",
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body => "He was an old man who fished alone in a skiff in the Gulf Stream and he had gone \
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eighty-four days now without taking a fish.",
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))?;
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index_writer.add_document(doc!(
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title => "Of Mice and Men",
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body => "A few miles south of Soledad, the Salinas River drops in close to the hillside \
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bank and runs deep and green. The water is warm too, for it has slipped twinkling \
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over the yellow sands in the sunlight before reaching the narrow pool. On one \
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side of the river the golden foothill slopes curve up to the strong and rocky \
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Gabilan Mountains, but on the valley side the water is lined with trees—willows \
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fresh and green with every spring, carrying in their lower leaf junctures the \
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debris of the winter’s flooding; and sycamores with mottled, white, recumbent \
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limbs and branches that arch over the pool"
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))?;
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// Multivalued field just need to be repeated.
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index_writer.add_document(doc!(
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title => "Frankenstein",
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title => "The Modern Prometheus",
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body => "You will rejoice to hear that no disaster has accompanied the commencement of an \
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enterprise which you have regarded with such evil forebodings. I arrived here \
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yesterday, and my first task is to assure my dear sister of my welfare and \
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increasing confidence in the success of my undertaking."
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))?;
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index_writer.commit()?;
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let reader = index
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.reader_builder()
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.reload_policy(ReloadPolicy::OnCommitWithDelay)
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.try_into()?;
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let searcher = reader.searcher();
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let query_parser = QueryParser::for_index(&index, vec![title, body]);
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// This will match documents containing the phrase "in the"
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// followed by some word starting with "su",
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// i.e. it will match "in the sunlight" and "in the success",
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// but not "in the Gulf Stream".
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let query = query_parser.parse_query("\"in the su\"*")?;
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let top_docs = searcher.search(&query, &TopDocs::with_limit(10).order_by_score())?;
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let mut titles = top_docs
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.into_iter()
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.map(|(_score, doc_address)| {
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let doc = searcher.doc::<TantivyDocument>(doc_address)?;
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let title = doc
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.get_first(title)
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.and_then(|v| v.as_str())
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.unwrap()
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.to_owned();
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Ok(title)
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})
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.collect::<Result<Vec<_>>>()?;
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titles.sort_unstable();
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assert_eq!(titles, ["Frankenstein", "Of Mice and Men"]);
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Ok(())
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}
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