fix: do not add none_sources when column_name is None

Author: heehehe

Diff for: pymysqlreplication/row_event.py

@@ -487,7 +487,7 @@ def __read_binary_slice(self, binary, start, size, data_length):
     def _get_none_sources(self, column_data):
         result = {}
         for column_name, value in column_data.items():
-            if value is not None:
+            if (column_name is None) or (value is not None):
                 continue
 
             source = self.__none_sources.get(column_name, "null")

Diff for: pymysqlreplication/tests/test_basic.py

@@ -649,20 +649,23 @@ def test_get_none_invalid(self):
         else:
             self.assertEqual(event.event_type, UPDATE_ROWS_EVENT_V1)
         self.assertIsInstance(event, UpdateRowsEvent)
-        
-        if event.rows[0].get("before_none_sources"):
-            self.assertEqual(event.rows[0]["before_none_sources"]["col0"], "null")
-            self.assertEqual(event.rows[0]["before_none_sources"]["col1"], "null")
-            self.assertEqual(event.rows[0]["before_none_sources"]["col2"], "out of datetime2 range")
-            self.assertEqual(event.rows[0]["before_none_sources"]["col3"], "null")
-            self.assertEqual(event.rows[0]["before_none_sources"]["col4"], "null")
-
-        if event.rows[0].get("after_none_sources"):
-            self.assertEqual(event.rows[0]["after_none_sources"]["col0"], "null")
-            self.assertEqual(event.rows[0]["after_none_sources"]["col1"], "null")
-            self.assertEqual(event.rows[0]["after_none_sources"]["col2"], "null")
-            self.assertEqual(event.rows[0]["after_none_sources"]["col3"], "out of date range")
-            self.assertEqual(event.rows[0]["after_none_sources"]["col4"], "empty set")
+
+        before_none_sources = event.rows[0].get("before_none_sources")
+        after_none_sources = event.rows[0].get("after_none_sources")
+
+        if before_none_sources:
+            self.assertEqual(before_none_sources["col0"], "null")
+            self.assertEqual(before_none_sources["col1"], "null")
+            self.assertEqual(before_none_sources["col2"], "out of datetime2 range")
+            self.assertEqual(before_none_sources["col3"], "null")
+            self.assertEqual(before_none_sources["col4"], "null")
+
+        if after_none_sources:
+            self.assertEqual(after_none_sources["col0"], "null")
+            self.assertEqual(after_none_sources["col1"], "null")
+            self.assertEqual(after_none_sources["col2"], "null")
+            self.assertEqual(after_none_sources["col3"], "out of date range")
+            self.assertEqual(after_none_sources["col4"], "empty set")
 
 
 class TestMultipleRowBinLogStreamReader(base.PyMySQLReplicationTestCase):