Fix get method in models.py to not throw an exception when returning an empty item.

pynamodb/models.py

@@ -548,10 +548,8 @@ def get(
             consistent_read=consistent_read,
             attributes_to_get=attributes_to_get,
         )
-        if data:
-            item_data = data.get(ITEM)
-            if item_data:
-                return cls.from_raw_data(item_data)
+        if data and ITEM in data:
+            return cls.from_raw_data(data.get(ITEM))
         raise cls.DoesNotExist()
 
     @classmethod

tests/test_model.py

@@ -1752,6 +1752,38 @@ def fake_dynamodb(*args):
             self.assertEqual(item.overidden_user_name, CUSTOM_ATTR_NAME_ITEM_DATA['Item']['user_name']['S'])
             self.assertEqual(item.overidden_user_id, CUSTOM_ATTR_NAME_ITEM_DATA['Item']['user_id']['S'])
 
+    def test_get_with_empty_item_from_attributes_to_get(self):
+        """
+        Test that get method doesn't raise DoesNotExist when attributes_to_get 
+        returns an empty Item dictionary but the item exists in DynamoDB.
+        """
+
+        def fake_dynamodb(*args):
+            kwargs = args[1]
+            if kwargs == {'TableName': UserModel.Meta.table_name}:
+                return MODEL_TABLE_DATA
+            elif 'Key' in kwargs and 'ProjectionExpression' in kwargs:
+                # This simulates DynamoDB returning an empty Item when the requested
+                # attributes don't exist or are empty, but the item itself exists
+                return {
+                    'Item': {}
+                }
+            return MODEL_TABLE_DATA
+
+        fake_db = MagicMock()
+        fake_db.side_effect = fake_dynamodb
+
+        with patch(PATCH_METHOD, new=fake_db) as req:
+            item = UserModel.get(
+                'foo',
+                'bar',
+                attributes_to_get=['nonexistent_attribute']
+            )
+            # The item should be returned with empty attributes
+            self.assertIsNotNone(item)
+            self.assertTrue(isinstance(item, UserModel))
+            self.assertIsNone(item.get_attributes().get('nonexistent_attribute'))
+
     def test_batch_get(self):
         """
         Model.batch_get