now associating a dewar to a slot

backend/app/models.py

@@ -79,7 +79,6 @@ class Dewar(Base):
     contact_person_id = Column(Integer, ForeignKey("contact_persons.id"))
 
     shipment = relationship("Shipment", back_populates="dewars")
-    events = relationship("LogisticsEvent", back_populates="dewar")
     return_address = relationship("Address")
     contact_person = relationship("ContactPerson")
     pucks = relationship("Puck", back_populates="dewar")
@@ -87,6 +86,7 @@ class Dewar(Base):
     dewar_type = relationship("DewarType")
     dewar_serial_number = relationship("DewarSerialNumber")
     slot = relationship("Slot", back_populates="dewar")
+    events = relationship("LogisticsEvent", back_populates="dewar")
 
     @property
     def number_of_pucks(self) -> int:
@@ -147,6 +147,7 @@ class Slot(Base):
     time_until_refill = Column(Integer)  # store as total seconds
     dewar_unique_id = Column(String, ForeignKey('dewars.unique_id'), nullable=True)  # Added field
     dewar = relationship("Dewar", back_populates="slot")
+    events = relationship("LogisticsEvent", back_populates="slot")
 
 
     @property
@@ -155,13 +156,14 @@ class Slot(Base):
             return self.last_refill + self.time_until_refill - datetime.utcnow()
         return None
 
-
 class LogisticsEvent(Base):
-    __tablename__ = 'logistics_events'
-    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
-    dewar_id = Column(Integer, ForeignKey('dewars.id'), nullable=False)
-    event_type = Column(String, nullable=False)
-    timestamp = Column(DateTime, default=datetime.utcnow)
+    __tablename__ = "logistics_events"
 
+    id = Column(Integer, primary_key=True, index=True)
+    dewar_id = Column(Integer, ForeignKey('dewars.id'))  # corrected table name
+    slot_id = Column(Integer, ForeignKey('slots.id'))   # corrected table name
+    event_type = Column(String, index=True)
+    timestamp = Column(DateTime, default=datetime.utcnow)
+    action_details = Column(String)
     dewar = relationship("Dewar", back_populates="events")
-    slot_id = Column(String, ForeignKey('slots.id'), nullable=True)
+    slot = relationship("Slot", back_populates="events")

backend/app/routers/logistics.py

@@ -87,4 +87,22 @@ async def scan_dewar(event_data: LogisticsEventCreate, db: Session = Depends(get
 def log_event(db: Session, dewar_id: int, slot_id: int, event_type: str):
     new_event = LogisticsEventModel(dewar_id=dewar_id, slot_id=slot_id, event_type=event_type)
     db.add(new_event)
-    db.commit()
+    db.commit()
+
+
+@router.post("/dewar/refill", response_model=dict)
+async def refill_dewar(qr_code: str, db: Session = Depends(get_db)):
+    dewar = db.query(DewarModel).filter(DewarModel.unique_id == qr_code).first()
+    if not dewar:
+        raise HTTPException(status_code=404, detail="Dewar not found")
+
+    # Process refill
+    dewar.last_refill = datetime.now()
+    new_event = LogisticsEventModel(
+        dewar_id=dewar.id, slot_id=None,  # No specific slot, as it's a refill event
+        event_type="refill",
+        action_details=f"{dewar.unique_id} refilled"
+    )
+    db.add(new_event)
+    db.commit()
+    return {"message": "Dewar refilled successfully"}