share_id is now Text, so it can accept hash.

create_db.py

@@ -36,7 +36,7 @@ class Card(Base):
     interest_rate   = Column(Float)
     item_location   = Column(String(1024))
     last_review     = Column(Text)
-    share_id        = Column(Integer) #explain: 0 means not shared, otherwise increment from db and generate new cards for all relevant(tbd) users
+    share_id        = Column(Text) #explain: 0 means not shared, otherwise increment from db and generate new cards for all relevant(tbd) users
 
 class Deck(Base):
     __tablename__   = 'deck'