More test app nonsense.

muck/models/exit.py

@@ -1,6 +1,18 @@
+from sqlalchemy import Column, Integer, ForeignKey
+from sqlalchemy.orm import relationship
+
+from crudkit.core.base import CRUDMixin
+
 from muck.models.dbref import Dbref, ObjectType
 
 class Exit(Dbref):
+    __tablename__ = "exits"
+
+    id = Column(Integer, ForeignKey("dbref.id"), primary_key=True)
+
+    destination_id = Column(Integer, ForeignKey("dbref.id"), nullable=True)
+    destination = relationship("Dbref", remote_side=[CRUDMixin.id], foreign_keys=[destination_id])
+
     __mapper_args__ = {
         "polymorphic_identity": ObjectType.EXIT
     }