Update code in endpoints/books.post.py

endpoints/books.post.py

@@ -0,0 +1,51 @@
+Sure, here's an example of a FastAPI endpoint that creates books and adds them to the database using SQLAlchemy and Pydantic:
+
+```python
+from typing import List
+from fastapi import FastAPI, HTTPException
+from pydantic import BaseModel
+from sqlalchemy import Column, Integer, String, create_engine
+from sqlalchemy.orm import declarative_base, sessionmaker
+
+from app.api.models.books_model import *
+from app.api.schemas.books_schema import *
+# SQLAlchemy setup
+Base = declarative_base()
+engine = create_engine('sqlite:///books.db', echo=True)
+Session = sessionmaker(bind=engine)
+
+# SQLAlchemy model
+
+@app.post('/books', response_model=BookSchema)
+def create_book(book: BookSchema):
+    session = Session()
+    try:
+        new_book = Book(title=book.title, author=book.author)
+        session.add(new_book)
+        session.commit()
+        return new_book
+    except Exception as e:
+        session.rollback()
+        raise HTTPException(status_code=500, detail=str(e))
+    finally:
+        session.close()
+```
+
+Here's what's happening:
+
+1. We define a SQLAlchemy model `Book` with `id`, `title`, and `author` columns.
+2. We create a Pydantic schema `BookSchema` that defines the expected input data for creating a new book.
+3. We create a FastAPI app instance.
+4. We define an endpoint `/books` that accepts `POST` requests with a `BookSchema` body.
+5. Inside the endpoint function `create_book`, we open a database session and try to create a new `Book` instance using the data from the request body.
+6. If the operation is successful, we commit the changes to the database and return the newly created book.
+7. If an exception occurs, we roll back the transaction and raise an HTTP exception with a 500 status code and the error message.
+8. Finally, we close the database session.
+
+To test this endpoint, you can use a tool like Postman or cURL. For example, with cURL:
+
+```
+curl -X POST -H "Content-Type: application/json" -d '{"title": "The Great Gatsby", "author": "F. Scott Fitzgerald"}' http://localhost:8000/books
+```
+
+This will create a new book in the `books.db` SQLite database file with the provided title and author.