Merge #601

601: Support ranking score threshold r=irevoire a=NoodleSamaChan

# Pull Request

## Related issue
Fixes #593

## What does this PR do?
fixes #593 and removed a slight typo from former PR (distinct option)

## PR checklist
Please check if your PR fulfills the following requirements:
- [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
- [x] Have you read the contributing guidelines?
- [x] Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!


Co-authored-by: NoodleSamaChan <[email protected]>

.code-samples.meilisearch.yaml

@@ -1730,3 +1730,12 @@ distinct_attribute_guide_distinct_parameter_1: |-
     .execute()
     .await
     .unwrap();
+search_parameter_reference_ranking_score_threshold_1: |-
+  let res = client
+    .index("INDEX_NAME")
+    .search()
+    .with_query("badman")
+    .with_ranking_score_threshold(0.2)
+    .execute()
+    .await
+    .unwrap();

src/search.rs

@@ -336,12 +336,16 @@ pub struct SearchQuery<'a, Http: HttpClient> {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub matching_strategy: Option<MatchingStrategies>,
 
+    ///Defines one attribute in the filterableAttributes list as a distinct attribute.
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub(crate) index_uid: Option<&'a str>,
+    pub distinct: Option<&'a str>,
 
-    ///Defines one attribute in the filterableAttributes list as a distinct attribute.
+    ///Excludes results below the specified ranking score.
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub(crate) distinct: Option<&'a str>,
+    pub ranking_score_threshold: Option<f64>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub(crate) index_uid: Option<&'a str>,
 }
 
 #[allow(missing_docs)]
@@ -372,6 +376,7 @@ impl<'a, Http: HttpClient> SearchQuery<'a, Http> {
             matching_strategy: None,
             index_uid: None,
             distinct: None,
+            ranking_score_threshold: None,
         }
     }
     pub fn with_query<'b>(&'b mut self, query: &'a str) -> &'b mut SearchQuery<'a, Http> {
@@ -568,6 +573,13 @@ impl<'a, Http: HttpClient> SearchQuery<'a, Http> {
         self.distinct = Some(distinct);
         self
     }
+    pub fn with_ranking_score_threshold<'b>(
+        &'b mut self,
+        ranking_score_threshold: f64,
+    ) -> &'b mut SearchQuery<'a, Http> {
+        self.ranking_score_threshold = Some(ranking_score_threshold);
+        self
+    }
     pub fn build(&mut self) -> SearchQuery<'a, Http> {
         self.clone()
     }
@@ -1134,6 +1146,21 @@ mod tests {
         Ok(())
     }
 
+    #[meilisearch_test]
+    async fn test_query_show_ranking_score_threshold(
+        client: Client,
+        index: Index,
+    ) -> Result<(), Error> {
+        setup_test_index(&client, &index).await?;
+
+        let mut query = SearchQuery::new(&index);
+        query.with_query("dolor text");
+        query.with_ranking_score_threshold(1.0);
+        let results: SearchResults<Document> = index.execute_query(&query).await.unwrap();
+        assert!(results.hits.is_empty());
+        Ok(())
+    }
+
     #[meilisearch_test]
     async fn test_phrase_search(client: Client, index: Index) -> Result<(), Error> {
         setup_test_index(&client, &index).await?;