Use simple_unaccent full text search configuration

docs/CHANGELOG.rst

@@ -13,6 +13,7 @@ Unreleased
 Changed
 -------
 - **BACKWARD INCOMPATIBLE:** Make move between collections a background job
+- Use ``simple_unaccent`` full text search configuration instead of ``simple``
 
 
 ===================

resolwe/flow/filters.py

@@ -127,7 +127,7 @@ class TextFilterMixin:
 
     def filter_text(self, queryset: QuerySet, name: str, value: str):
         """Full-text search."""
-        query = SearchQuery(value, config="simple")
+        query = SearchQuery(value, config="simple_unaccent")
         return (
             queryset.filter(**{name: query})
             # This assumes that field is already a TextSearch vector and thus

resolwe/flow/migrations/0026_create_unaccent_full_text_search_config.py

@@ -0,0 +1,29 @@
+# Generated by Django 4.2.9 on 2024-02-13 07:01
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("flow", "0025_add_unaccent_extension"),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            """
+            DO
+            $$BEGIN
+                CREATE TEXT SEARCH CONFIGURATION simple_unaccent( COPY = simple );
+            EXCEPTION
+                WHEN unique_violation THEN
+                    NULL;  -- ignore error
+            END;$$;
+            """
+        ),
+        migrations.RunSQL(
+            "ALTER TEXT SEARCH CONFIGURATION simple_unaccent "
+            + "ALTER MAPPING FOR hword, hword_part, word "
+            + "WITH unaccent, simple;"
+        ),
+    ]

resolwe/flow/tests/test_filtering.py

@@ -316,6 +316,9 @@ def test_filter_text(self):
         self._check_filter({"text": "test"}, self.collections)
         self._check_filter({"text": "user"}, [self.collections[2]])
 
+        # Test unaccented search.
+        self._check_filter({"text": "Tešt čollećtion 1"}, [self.collections[1]])
+
         # By contributor.
         self._check_filter({"text": "joe"}, self.collections[:2])
         self._check_filter({"text": "Miller"}, self.collections[:2])