First commit.

example_app/models.py

@@ -0,0 +1,18 @@
+from typing import List
+from sqlalchemy import String, ForeignKey
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column,  relationship
+from crudkit import CrudMixin
+
+class Base(DeclarativeBase):
+    pass
+
+class Author(CrudMixin, Base):
+    __tablename__ = "author"
+    name: Mapped[str] = mapped_column(String(200), nullable=False)
+    books: Mapped[List["Book"]] = relationship(back_populates="author", cascade="all, delete-orphan")
+
+class Book(CrudMixin, Base):
+    __tablename__ = "book"
+    title: Mapped[str] = mapped_column(String(200), nullable=False)
+    author_id: Mapped[int] = mapped_column(ForeignKey("author.id"), nullable=False)
+    author: Mapped[Author] = relationship(back_populates="books")