Split frontend model from backend model

formula10/database/model/db_race_guess.py

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+from typing import Any, List
+from sqlalchemy import ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from formula10.database.model.db_user import DbUser
+from formula10.database.model.db_race import DbRace
+from formula10.database.model.db_driver import DbDriver
+from formula10 import db
+
+
+class DbRaceGuess(db.Model):
+    """
+    A guess a user made for a race.
+    It stores the corresponding race and the guessed drivers for PXX and DNF.
+    """
+    __tablename__ = "raceguess"
+    __csv_header__ = ["user_name", "race_name", "pxx_driver_name", "dnf_driver_name"]
+
+    def __init__(self, *, user_name: str, race_name: str, pxx_driver_name: str, dnf_driver_name: str):
+        self.user_name = user_name  # Primary key
+        self.race_name = race_name  # Primary key
+
+        self.dnf_driver_name = dnf_driver_name
+        self.pxx_driver_name = pxx_driver_name
+
+    @classmethod
+    def from_csv(cls, row: List[str]):
+        db_race_guess: DbRaceGuess = cls(user_name=str(row[0]),
+                                         race_name=str(row[1]),
+                                         pxx_driver_name=str(row[2]),
+                                         dnf_driver_name=str(row[3]))
+        return db_race_guess
+
+    def to_csv(self) -> List[Any]:
+        return [
+            self.user_name,
+            self.race_name,
+            self.pxx_driver_name,
+            self.dnf_driver_name
+        ]
+
+    user_name: Mapped[str] = mapped_column(ForeignKey("user.name"), primary_key=True)
+    race_name: Mapped[str] = mapped_column(ForeignKey("race.name"), primary_key=True)
+    pxx_driver_name: Mapped[str] = mapped_column(ForeignKey("driver.name"))
+    dnf_driver_name: Mapped[str] = mapped_column(ForeignKey("driver.name"))
+
+    # Relationships
+    user: Mapped[DbUser] = relationship("DbUser", foreign_keys=[user_name])
+    race: Mapped[DbRace] = relationship("DbRace", foreign_keys=[race_name])
+    pxx: Mapped[DbDriver] = relationship("DbDriver", foreign_keys=[pxx_driver_name])
+    dnf: Mapped[DbDriver] = relationship("DbDriver", foreign_keys=[dnf_driver_name])