utils: teach our json serializer to handle more types (#1907)

Namely datetime.time and numpy.bool_

Refs: #1900
Refs: #1903

Author: xrmx

superset/utils.py

@@ -5,7 +5,7 @@
 from __future__ import unicode_literals
 
 from builtins import object
-from datetime import date, datetime
+from datetime import date, datetime, time
 import decimal
 import functools
 import json
@@ -216,6 +216,8 @@ def base_json_conv(obj):
 
     if isinstance(obj, numpy.int64):
         return int(obj)
+    elif isinstance(obj, numpy.bool_):
+        return bool(obj)
     elif isinstance(obj, set):
         return list(obj)
     elif isinstance(obj, decimal.Decimal):
@@ -239,6 +241,8 @@ def json_iso_dttm_ser(obj):
         obj = obj.isoformat()
     elif isinstance(obj, date):
         obj = obj.isoformat()
+    elif isinstance(obj, time):
+        obj = obj.isoformat()
     else:
         raise TypeError(
             "Unserializable object {} of type {}".format(obj, type(obj))

tests/utils_tests.py

@@ -1,24 +1,47 @@
-from datetime import datetime, date, timedelta
-from superset import utils
-import unittest
-
-from mock import Mock, patch
-
-class UtilsTestCase(unittest.TestCase):
-    def test_json_int_dttm_ser(self):
-        dttm = datetime(2020, 1, 1)
-        ts = 1577836800000.0
-        json_int_dttm_ser = utils.json_int_dttm_ser
-        assert json_int_dttm_ser(dttm) == ts
-        assert json_int_dttm_ser(date(2020, 1, 1)) == ts
-        assert json_int_dttm_ser(datetime(1970, 1, 1)) == 0
-        assert json_int_dttm_ser(date(1970, 1, 1)) == 0
-        assert json_int_dttm_ser(dttm + timedelta(milliseconds=1)) == (ts + 1)
-
-        with self.assertRaises(TypeError):
-            utils.json_int_dttm_ser("this is not a date")
-
-    @patch('superset.utils.datetime')
-    def test_parse_human_timedelta(self, mock_now):
-        mock_now.return_value = datetime(2016, 12, 1)
-        self.assertEquals(utils.parse_human_timedelta('now'), timedelta(0))
+from datetime import datetime, date, timedelta, time
+from decimal import Decimal
+from superset.utils import (
+    json_int_dttm_ser, json_iso_dttm_ser, base_json_conv, parse_human_timedelta
+)
+import unittest
+import uuid
+
+from mock import Mock, patch
+import numpy
+
+
+class UtilsTestCase(unittest.TestCase):
+    def test_json_int_dttm_ser(self):
+        dttm = datetime(2020, 1, 1)
+        ts = 1577836800000.0
+        assert json_int_dttm_ser(dttm) == ts
+        assert json_int_dttm_ser(date(2020, 1, 1)) == ts
+        assert json_int_dttm_ser(datetime(1970, 1, 1)) == 0
+        assert json_int_dttm_ser(date(1970, 1, 1)) == 0
+        assert json_int_dttm_ser(dttm + timedelta(milliseconds=1)) == (ts + 1)
+
+        with self.assertRaises(TypeError):
+            json_int_dttm_ser("this is not a date")
+
+    def test_json_iso_dttm_ser(self):
+        dttm = datetime(2020, 1, 1)
+        dt = date(2020, 1, 1)
+        t = time()
+        assert json_iso_dttm_ser(dttm) == dttm.isoformat()
+        assert json_iso_dttm_ser(dt) == dt.isoformat()
+        assert json_iso_dttm_ser(t) == t.isoformat()
+
+        with self.assertRaises(TypeError):
+            json_iso_dttm_ser("this is not a date")
+
+    def test_base_json_conv(self):
+        assert isinstance(base_json_conv(numpy.bool_(1)), bool) == True
+        assert isinstance(base_json_conv(numpy.int64(1)), int) == True
+        assert isinstance(base_json_conv(set([1])), list) == True
+        assert isinstance(base_json_conv(Decimal('1.0')), float) == True
+        assert isinstance(base_json_conv(uuid.uuid4()), str) == True
+
+    @patch('superset.utils.datetime')
+    def test_parse_human_timedelta(self, mock_now):
+        mock_now.return_value = datetime(2016, 12, 1)
+        self.assertEquals(parse_human_timedelta('now'), timedelta(0))