[Plugin]balance: Fixed typo in function name and fixed db model

flaschengeist/plugins/balance/__init__.py

@@ -164,7 +164,7 @@ def change_balance(userid, current_session: Session):
         if (sender == current_session._user and sender.has_permission(permissions.SEND)) or (
             sender != current_session._user and current_session._user.has_permission(permissions.SEND_OTHER)
         ):
-            return HTTP.created(balance_controller.send(sender, user, data["amount"], current_session._user))
+            return HTTP.created(balance_controller.send(sender, user, amount, current_session._user))
 
     elif (
         amount < 0

flaschengeist/plugins/balance/balance_controller.py

@@ -71,7 +71,7 @@ def send(sender: User, receiver, amount: float, author: User):
         raise BadRequest
 
     if sender and sender.has_attribute(__attribute_limit):
-        if (get(sender)[2] - amount) < sender.get_attribute(__attribute_limit) and not author.has_permission(
+        if (get_balance(sender)[2] - amount) < sender.get_attribute(__attribute_limit) and not author.has_permission(
             permissions.EXCEED_LIMIT
         ):
             raise BadRequest("Limit exceeded")

flaschengeist/plugins/balance/models.py

@@ -19,7 +19,9 @@ class Transaction(db.Model, ModelSerializeMixin):
     id: int = db.Column("id", db.Integer, primary_key=True)
     time: datetime = db.Column(UtcDateTime, nullable=False, default=UtcDateTime.current_utc)
     amount: float = db.Column(db.Numeric(precision=5, scale=2, asdecimal=False), nullable=False)
-    reversal: Optional["Transaction"] = db.relationship("Transaction", foreign_keys=[_reversal_id])
+    reversal: Optional["Transaction"] = db.relationship(
+        "Transaction", uselist=False, post_update=True, foreign_keys=[_reversal_id]
+    )
 
     # Dummy properties used for JSON serialization (userid instead of full user)
     sender_id: Optional[str] = ""