commit 343f2cbb8831288a59fb223c6a484290fa03dbfa
Author: Bùi Thành Nhân <hi@imnhan.com>
Date:   Thu Aug 6 20:22:42 2020 +0700

    mangadex oneshots don't have chap number at all

diff --git a/src/mangoapi/__init__.py b/src/mangoapi/__init__.py
index 9e66dd7..7bb4fa5 100644
--- a/src/mangoapi/__init__.py
+++ b/src/mangoapi/__init__.py
@@ -10,6 +10,9 @@
 
 
 def _parse_chapter_number(string):
+    if string == "":
+        # most likely a oneshot
+        return {"number": ""}
     nums = string.split(".")
     count = len(nums)
     assert count == 1 or count == 2
diff --git a/src/pytaku/persistence.py b/src/pytaku/persistence.py
index 41e0a00..ab3a2be 100644
--- a/src/pytaku/persistence.py
+++ b/src/pytaku/persistence.py
@@ -118,8 +118,8 @@ def save_chapter(chapter):
             "id": chapter["id"],
             "title_id": chapter["title_id"],
             "site": "mangadex",
-            "num_major": chapter["num_major"],
-            "num_minor": chapter.get("num_minor", None),
+            "num_major": chapter.get("num_major"),
+            "num_minor": chapter.get("num_minor"),
             "name": chapter["name"],
             "pages": json.dumps(chapter["pages"]),
             "groups": json.dumps(chapter["groups"]),