Make datetime.time json serializable, to string ISO format.

Author: surister

CHANGES.rst

@@ -4,6 +4,7 @@ Changes for crate
 
 Unreleased
 ==========
+- Make ``datetime.time`` json serializable.
 
 2025/01/30 2.0.0
 ================

src/crate/client/http.py

@@ -98,6 +98,8 @@ def json_encoder(obj: t.Any) -> t.Union[int, str]:
     - Python's `dt.datetime` and `dt.date` types will be
       serialized to `int` after converting to milliseconds
       since epoch.
+    - Python's `dt.time` will be serialized to `str`, following
+    the ISO format.
 
     https://github.com/ijl/orjson#default
     https://cratedb.com/docs/crate/reference/en/latest/general/ddl/data-types.html#type-timestamp
@@ -113,6 +115,8 @@ def json_encoder(obj: t.Any) -> t.Union[int, str]:
             delta.microseconds / 1000.0
             + (delta.seconds + delta.days * 24 * 3600) * 1000.0
         )
+    if isinstance(obj, dt.time):
+        return obj.isoformat()
     if isinstance(obj, dt.date):
         return calendar.timegm(obj.timetuple()) * 1000
     raise TypeError

tests/client/test_http.py

@@ -18,7 +18,7 @@
 # However, if you have executed another commercial license agreement
 # with Crate these terms will supersede the license and you may use the
 # software solely pursuant to the terms of the relevant commercial agreement.
-
+import datetime
 import datetime as dt
 import json
 import multiprocessing
@@ -164,7 +164,7 @@ def test_http_error_is_re_raised(self, request):
 
     @patch(REQUEST)
     def test_programming_error_contains_http_error_response_content(
-        self, request
+            self, request
     ):
         request.side_effect = Exception("this shouldn't be raised")
 
@@ -354,6 +354,18 @@ def test_uuid_serialization(self, request):
         self.assertEqual(data["args"], [str(uid)])
         client.close()
 
+    @patch(REQUEST, autospec=True)
+    def test_time_serialization(self, request):
+        client = Client(servers="localhost:4200")
+        request.return_value = fake_response(200)
+
+        obj = datetime.datetime.now().time()
+        client.sql("insert into my_table (str_col) values (?)", (obj,))
+
+        data = json.loads(request.call_args[1]["data"])
+        self.assertEqual(data["args"], [str(obj)])
+        client.close()
+
     @patch(REQUEST, fake_request(duplicate_key_exception()))
     def test_duplicate_key_error(self):
         """