models: Add sensible repr

bitvend/models.py

@@ -20,6 +20,9 @@ class User(db.Model):
     def __str__(self):
         return self.uid
 
+    def __repr__(self):
+        return '<User {0.uid} {0.balance}>'.format(self)
+
     @hybrid_property
     def balance(self):
         return sum((_.amount or 0) for _ in self.transactions)
@@ -97,3 +100,6 @@ class Transaction(db.Model):
     __mapper_args__ = {
         "order_by": created.desc()
         }
+
+    def __repr__(self):
+        return '<Transaction {0.uid} {0.type} {0.amount} {0.created}>'.format(self)