Auth: Require logged in user to delete registrations, team_registrations and subscriptions

src/meal_manager/models.py

@@ -33,8 +33,12 @@ class Event(Base):
     team_prep_min: Mapped[int] = mapped_column(default=1, nullable=False)
     team_prep_max: Mapped[int] = mapped_column(default=1, nullable=False)
 
-    registrations: Mapped[list["Registration"]] = relationship("Registration", cascade="all, delete")
-    team: Mapped[list["TeamRegistration"]] = relationship("TeamRegistration", cascade="all, delete")
+    registrations: Mapped[list["Registration"]] = relationship(
+        "Registration", cascade="all, delete"
+    )
+    team: Mapped[list["TeamRegistration"]] = relationship(
+        "TeamRegistration", cascade="all, delete"
+    )
 
     def team_min_reached(self, work_type: WorkTypes):
         threshold = {
@@ -62,6 +66,14 @@ class Event(Base):
             self.team_max_reached(work_type) for work_type in typing.get_args(WorkTypes)
         )
 
+    @property
+    def registration_open(self):
+        return datetime.now() < self.registration_deadline
+
+    @property
+    def in_the_past(self):
+        return datetime.now() > self.event_time
+
 
 class TeamRegistration(Base):
     __tablename__ = "teamregistration"