adding confirmation model

ereuse_devicehub/resources/action/models.py

@@ -1433,6 +1433,18 @@ class CancelReservation(Organize):
     """The act of cancelling a reservation."""
 
 
+class TradeNote(JoinedTableMixin, ActionWithMultipleDevices):
+    """Note add to one trade"""
+    trade_id = db.Column(UUID(as_uuid=True),
+                             db.ForeignKey('trade.id'),
+                             nullable=False)
+    trade = db.relationship('Trade',
+                            backref=backref('notes',
+                                            uselist=True, 
+                                            lazy=True),
+                            primaryjoin='TradeNote.trade_id == Trade.id')
+
+
 class Confirm(JoinedTableMixin, ActionWithMultipleDevices):
     """Users confirm the offer and change it to trade"""
     user_id = db.Column(UUID(as_uuid=True),