Integration of sqlite3 database now fully functional with all implemented functions

backend/app/models.py

@@ -1,9 +1,7 @@
 from sqlalchemy import Column, Integer, String, Date, ForeignKey
 from sqlalchemy.orm import relationship
-from app.database import Base  # Ensure this imports correctly
+from app.database import Base
 
-
-# SQLAlchemy ORM models
 class Shipment(Base):
     __tablename__ = "shipments"
 
@@ -21,7 +19,6 @@ class Shipment(Base):
     proposal = relationship("Proposal", back_populates="shipments")
     dewars = relationship("Dewar", back_populates="shipment")
 
-
 class ContactPerson(Base):
     __tablename__ = "contact_persons"
 
@@ -33,7 +30,6 @@ class ContactPerson(Base):
 
     shipments = relationship("Shipment", back_populates="contact_person")
 
-
 class Address(Base):
     __tablename__ = "addresses"
 
@@ -45,7 +41,6 @@ class Address(Base):
 
     shipments = relationship("Shipment", back_populates="return_address")
 
-
 class Dewar(Base):
     __tablename__ = "dewars"
 
@@ -65,9 +60,8 @@ class Dewar(Base):
     contact_person_id = Column(Integer, ForeignKey("contact_persons.id"))  # Added
 
     shipment = relationship("Shipment", back_populates="dewars")
-    return_address = relationship("Address")  # Defines relationship with Address
-    contact_person = relationship("ContactPerson")  # Defines relationship with ContactPerson
-
+    return_address = relationship("Address")
+    contact_person = relationship("ContactPerson")
 
 class Proposal(Base):
     __tablename__ = "proposals"
@@ -75,4 +69,4 @@ class Proposal(Base):
     id = Column(Integer, primary_key=True, index=True)
     number = Column(String)
 
-    shipments = relationship("Shipment", back_populates="proposal")
+    shipments = relationship("Shipment", back_populates="proposal")