Altered the Cardinality of the foreign keys to be non-nullable

src/pilgrim/models/entry.py

@@ -17,7 +17,7 @@ class Entry(Base):
         "Photo",
         secondary=photo_entry_association,
         back_populates="entries")
-    fk_travel_diary_id = Column(Integer, ForeignKey("travel_diaries.id"))
+    fk_travel_diary_id = Column(Integer, ForeignKey("travel_diaries.id"),nullable=False)
     def __init__(self, title: str, text: str, date: str, travel_diary_id: int, **kw: Any):
         super().__init__(**kw)
         self.title = title

src/pilgrim/models/photo.py

@@ -20,7 +20,7 @@ class Photo(Base):
         back_populates="photos"
     )
 
-    fk_travel_diary_id = Column(Integer, ForeignKey("travel_diaries.id"))
+    fk_travel_diary_id = Column(Integer, ForeignKey("travel_diaries.id"),nullable=False)
 
     def __init__(self, filepath, name, addition_date=None, caption=None, entries=None, **kw: Any):
         super().__init__(**kw)

src/pilgrim/models/photo_in_entry.py

@@ -4,5 +4,5 @@ from ..database import Base
 
 photo_entry_association = Table('photo_entry_association', Base.metadata,
 Column('id', Integer, primary_key=True, autoincrement=True),
-    Column('fk_photo_id', Integer, ForeignKey('photos.id')),
-    Column('fk_entry_id', Integer, ForeignKey('entries.id')))
+    Column('fk_photo_id', Integer, ForeignKey('photos.id'),nullable=False),
+    Column('fk_entry_id', Integer, ForeignKey('entries.id'),nullable=False))

src/pilgrim/service/entry_service.py

@@ -16,8 +16,6 @@ class EntryService:
         self.session.add(new_entry)
         self.session.commit()
         self.session.refresh(new_entry)
-
-
         return new_entry
 
     def read_by_id(self,entry_id:int)->Entry: