feat(models): add basic database structure

7project/backend/app/models/transaction.py

@@ -1,9 +1,15 @@
-from sqlalchemy import Column, Integer, String, Float
+from fastapi_users_db_sqlalchemy import GUID
+from sqlalchemy import Column, Integer, String, Float, ForeignKey, UUID
+from sqlalchemy.orm import relationship
 from app.core.base import Base
 
+
 class Transaction(Base):
     __tablename__ = "transaction"
     id = Column(Integer, primary_key=True, autoincrement=True)
     amount = Column(Float, nullable=False)
     description = Column(String(length=255), nullable=True)
+    user_id = Column(GUID, ForeignKey("user.id"), nullable=False)
 
+    # Relationship
+    user = relationship("User", back_populates="transactions")