updated song search

akarpov/music/documents.py

@@ -11,7 +11,7 @@ class SongDocument(Document):
         properties={
             "name": fields.TextField(
                 fields={
-                    "raw": fields.KeywordField(normalizer="lowercase"),
+                    "raw": fields.KeywordField(normalizer="lowercase_normalizer"),
                 },
             ),
             "name_transliterated": fields.TextField(
@@ -30,7 +30,7 @@ class SongDocument(Document):
         properties={
             "name": fields.TextField(
                 fields={
-                    "raw": fields.KeywordField(normalizer="lowercase"),
+                    "raw": fields.KeywordField(normalizer="lowercase_normalizer"),
                 },
             ),
             "name_transliterated": fields.TextField(
@@ -67,14 +67,14 @@ class Index:
         settings = {
             "number_of_shards": 1,
             "number_of_replicas": 0,
-            "normalizer": {
-                "lowercase_normalizer": {
-                    "type": "custom",
-                    "char_filter": [],
-                    "filter": ["lowercase"],
-                }
-            },
             "analysis": {
+                "normalizer": {
+                    "lowercase_normalizer": {
+                        "type": "custom",
+                        "char_filter": [],
+                        "filter": ["lowercase"],
+                    }
+                },
                 "filter": {
                     "my_transliterator": {
                         "type": "icu_transform",
@@ -151,8 +151,8 @@ class Index:
                         "filter": [
                             "lowercase",
                             "autocomplete_filter",
-                            "english_stemmer",  # Apply English stemming for autocomplete
-                            "russian_stemmer",  # Include Russian stemming if applicable
+                            "english_stemmer",
+                            "russian_stemmer",
                         ],
                     },
                     "search_synonym_with_stemming": {
@@ -161,8 +161,8 @@ class Index:
                         "filter": [
                             "lowercase",
                             "synonym_filter",
-                            "english_stemmer",  # Apply English stemming for synonym search
-                            "russian_stemmer",  # Include Russian stemming if processing Russian synonyms
+                            "english_stemmer",
+                            "russian_stemmer",
                         ],
                     },
                 },
@@ -183,7 +183,7 @@ class AuthorDocument(Document):
     name = fields.TextField(
         fields={
             "raw": fields.KeywordField(),
-            "exact": fields.KeywordField(normalizer="lowercase"),
+            "exact": fields.KeywordField(normalizer="lowercase_normalizer"),
         },
     )
     name_transliterated = fields.TextField(
@@ -198,7 +198,7 @@ class AuthorDocument(Document):
 
     class Index:
         name = "authors"
-        settings = SongDocument.Index.settings  # Reuse settings
+        settings = SongDocument.Index.settings
 
     class Django:
         model = Author
@@ -209,7 +209,7 @@ class AlbumDocument(Document):
     name = fields.TextField(
         fields={
             "raw": fields.KeywordField(),
-            "exact": fields.KeywordField(normalizer="lowercase"),
+            "exact": fields.KeywordField(normalizer="lowercase_normalizer"),
         },
     )
     name_transliterated = fields.TextField(
@@ -243,7 +243,7 @@ class AlbumDocument(Document):
 
     class Index:
         name = "albums"
-        settings = SongDocument.Index.settings  # Reuse settings
+        settings = SongDocument.Index.settings
 
     class Django:
         model = Album

akarpov/music/services/search.py

@@ -10,28 +10,60 @@
 def search_song(query):
     search = SongDocument.search()
 
-    # Build a multi_match query that searches in song name, authors' names, and album names
-    multi_match_query = ES_Q(
-        "multi_match",
-        query=query,
-        fields=[
-            "name^5",
-            "name.raw^10",
-            "name.exact^15",
-            "authors.name^4",
-            "authors.name.raw^8",
-            "authors.name.exact^12",
-            "album.name^3",
-            "album.name.raw^6",
-            "album.name.exact^9",
-        ],
-        fuzziness="AUTO",
-        operator="and",
-        type="best_fields",
-    )
+    # Split the query into words
+    terms = query.strip().split()
+
+    # Initialize must and should clauses
+    must_clauses = []
+    should_clauses = []
+
+    # Build queries for song names
+    song_name_queries = [
+        ES_Q("match_phrase", name={"query": query, "boost": 5}),
+        ES_Q("match", name={"query": query, "fuzziness": "AUTO", "boost": 4}),
+        ES_Q("wildcard", name={"value": f"*{query.lower()}*", "boost": 2}),
+    ]
+
+    # Build queries for author names
+    author_name_queries = [
+        ES_Q(
+            "nested",
+            path="authors",
+            query=ES_Q("match_phrase", name={"query": query, "boost": 5}),
+        ),
+        ES_Q(
+            "nested",
+            path="authors",
+            query=ES_Q("match", name={"query": query, "fuzziness": "AUTO", "boost": 4}),
+        ),
+        ES_Q(
+            "nested",
+            path="authors",
+            query=ES_Q("wildcard", name={"value": f"*{query.lower()}*", "boost": 2}),
+        ),
+    ]
+
+    # If the query contains multiple terms, assume it might include both song and author names
+    if len(terms) > 1:
+        # Build combined queries
+        must_clauses.extend(
+            [
+                ES_Q("bool", should=song_name_queries),
+                ES_Q("bool", should=author_name_queries),
+            ]
+        )
+    else:
+        # If single term, search both song and author names but with lower boost
+        should_clauses.extend(song_name_queries + author_name_queries)
+
+    # Combine must and should clauses
+    if must_clauses:
+        search_query = ES_Q("bool", must=must_clauses, should=should_clauses)
+    else:
+        search_query = ES_Q("bool", should=should_clauses, minimum_should_match=1)
 
     # Execute search with size limit
-    search = search.query(multi_match_query).extra(size=20)
+    search = search.query(search_query).extra(size=20)
     response = search.execute()
 
     if response.hits: