Fix warmup

database/models/base.py

-from typing import Any, Dict
-
 from sqlalchemy.orm import declarative_base
 
+Base = declarative_base()
 
-class Base(declarative_base()):
-    def to_dict(self) -> Dict[str, Any]:
-        result: Dict[str, Any] = {}
-        for column in self.__table__.columns:
-            result[column.name] = getattr(self, column.name)
 
-        return result
+class SerializerMixin:
+    def to_dict(self):
+        return {column.name: getattr(self, column.name) for column in self.__table__.columns}

database/models/cams.py

 from sqlalchemy import Column, Integer, String, ForeignKey,\
     Index, UniqueConstraint
-from .base import Base
+from .base import Base, SerializerMixin
 
 
-class Cam(Base):
+class Cam(Base, SerializerMixin):
     __tablename__ = 'cams'
 
     id: Column = Column(Integer, primary_key=True)  # Will make SERIAL