updated db models

app/models.py

@@ -32,6 +32,14 @@ class Art(db.Model):
 class List(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     filehash = db.Column(db.String(64)) # sha256 hash
+    seller = db.Column(db.Integer)
     min_price = db.Column(db.Float)
     out_price = db.Column(db.Float)
-    bidlist = db.Column(db.String(200)) ## need to store list of bids
+    timeout = db.Column(db.DateTime(timezone=True))
+
+class Bids(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    filehash = db.Column(db.String(64)) # sha256 hash
+    buyer = db.Column(db.Integer)
+    bid_price = db.Column(db.Float)
+    bid_date = db.Column(db.DateTime(timezone=True), default=func.now())