fix: repair order_by_field with date fields

src/searcher.rs

@@ -182,7 +182,7 @@ impl Searcher {
  if let Some(order_by) = order_by_field {
  let collector = TopDocs::with_limit(limit)
  .and_offset(offset)
- .order_by_fast_field(order_by, order.into());
+ .order_by_u64_field(order_by, order.into());
  let top_docs_handle =
  multicollector.add_collector(collector);
  let ret = self.inner.search(query.get(), &multicollector);

tests/tantivy_test.py

@@ -232,6 +232,57 @@ def test_order_by_search_without_fast_field(self):
  result = searcher.search(query, 10, order_by_field="order")
  assert len(result.hits) == 0
 
+ def test_order_by_search_date(self):
+ schema = (
+ SchemaBuilder()
+ .add_date_field("order", fast=True)
+ .add_text_field("title", stored=True)
+ .build()
+ )
+
+ index = Index(schema)
+ writer = index.writer()
+
+ doc = Document()
+ doc.add_date("order", datetime.datetime(2020, 1, 1))
+ doc.add_text("title", "Test title")
+
+ writer.add_document(doc)
+
+ doc = Document()
+ doc.add_date("order", datetime.datetime(2022, 1, 1))
+ doc.add_text("title", "Final test title")
+ writer.add_document(doc)
+
+ doc = Document()
+ doc.add_date("order", datetime.datetime(2021, 1, 1))
+ doc.add_text("title", "Another test title")
+
+ writer.add_document(doc)
+
+ writer.commit()
+ index.reload()
+
+ query = index.parse_query("test")
+
+ searcher = index.searcher()
+
+ result = searcher.search(query, 10, order_by_field="order")
+
+ assert len(result.hits) == 3
+
+ _, doc_address = result.hits[0]
+ searched_doc = index.searcher().doc(doc_address)
+ assert searched_doc["title"] == ["Final test title"]
+
+ _, doc_address = result.hits[1]
+ searched_doc = index.searcher().doc(doc_address)
+ assert searched_doc["title"] == ["Another test title"]
+
+ _, doc_address = result.hits[2]
+ searched_doc = index.searcher().doc(doc_address)
+ assert searched_doc["title"] == ["Test title"]
+
  def test_with_merges(self):
  # This test is taken from tantivy's test suite:
  # https://github.com/quickwit-oss/tantivy/blob/42acd334f49d5ff7e4fe846b5c12198f24409b50/src/indexer/index_writer.rs#L1130