fix: convert date and time object to iso format for JSON

cubicweb_api/__init__.py

@@ -2,9 +2,10 @@
 
 This cube is the new api which will be integrated in CubicWeb 4.
 """
-from datetime import datetime
+from datetime import datetime, date, time
+from typing import Union
 
 from pyramid.config import Configurator
 from pyramid.renderers import JSON
 
 
@@ -6,12 +7,18 @@
 
 from pyramid.config import Configurator
 from pyramid.renderers import JSON
 
 
-def datetime_adapter(obj, request):
+def datetime_adapter(obj: Union[datetime, date, time], request):
+    """
+    Converts datetime, date and time object to an ISO string for JSON serialization
+    :param obj: the object to convert
+    :param request: the current request
+    :return:
+    """
     return obj.isoformat()
 
 
 def includeme(config: Configurator):
     json_renderer = JSON()
     json_renderer.add_adapter(datetime, datetime_adapter)
@@ -12,9 +19,11 @@
     return obj.isoformat()
 
 
 def includeme(config: Configurator):
     json_renderer = JSON()
     json_renderer.add_adapter(datetime, datetime_adapter)
+    json_renderer.add_adapter(date, datetime_adapter)
+    json_renderer.add_adapter(time, datetime_adapter)
 
     config.add_renderer("json", json_renderer)
     config.include(".routes")