From 4af7d7c45f4ee1892b63174cdb009a0f55d90162 Mon Sep 17 00:00:00 2001
From: Stone <47559019+st1020@users.noreply.github.com>
Date: Thu, 28 Sep 2023 05:42:38 +0800
Subject: [PATCH] Adding delete_all_documents method for IndexWriter (#133)

---
 src/index.rs          |  6 ++++++
 tests/tantivy_test.py | 12 ++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/index.rs b/src/index.rs
index 0102c1b..573e77d 100644
--- a/src/index.rs
+++ b/src/index.rs
@@ -117,6 +117,12 @@ impl IndexWriter {
         Ok(())
     }
 
+    /// Deletes all documents from the index.
+    fn delete_all_documents(&mut self) -> PyResult<()> {
+        self.inner()?.delete_all_documents().map_err(to_pyerr)?;
+        Ok(())
+    }
+
     /// The opstamp of the last successful commit.
     ///
     /// This is the opstamp the index will rollback to if there is a failure
diff --git a/tests/tantivy_test.py b/tests/tantivy_test.py
index 6b1d7fd..4fb8869 100644
--- a/tests/tantivy_test.py
+++ b/tests/tantivy_test.py
@@ -488,6 +488,18 @@ class TestClass(object):
 
         assert orig == pickled
 
+    def test_delete_all_documents(self, ram_index):
+        index = ram_index
+        writer = index.writer()
+        writer.delete_all_documents()
+        writer.commit()
+
+        index.reload()
+        query = index.parse_query("sea whale", ["title", "body"])
+        result = index.searcher().search(query, 10)
+
+        assert len(result.hits) == 0
+
 
 class TestUpdateClass(object):
     def test_delete_update(self, ram_index):