Add subitem

{{cookiecutter.project_slug}}/backend/app/app/db/base.py

@@ -3,3 +3,4 @@
 from app.db.base_class import Base  # noqa
 from app.db_models.user import User  # noqa
 from app.db_models.item import Item  # noqa
+from app.db_models.subitem import SubItem  # noqa

{{cookiecutter.project_slug}}/backend/app/app/db_models/item.py

@@ -10,3 +10,4 @@ class Item(Base):
     description = Column(String, index=True)
     owner_id = Column(Integer, ForeignKey("user.id"))
     owner = relationship("User", back_populates="items")
+    subitems = relationship("SubItem", back_populates="item")

{{cookiecutter.project_slug}}/backend/app/app/db_models/subitem.py

@@ -0,0 +1,12 @@
+from sqlalchemy import Column, ForeignKey, Integer, String
+from sqlalchemy.orm import relationship
+
+from app.db.base_class import Base
+
+
+class SubItem(Base):
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String, index=True)
+    description = Column(String, index=True)
+    item_id = Column(Integer, ForeignKey("item.id"))
+    item = relationship("Item", back_populates="subitems")