Update main.py

add auto Increment on parameter ID

main.py

@@ -36,6 +36,12 @@ def write_books_file(books: List[dict]):
     with open(DB_FILE, "w") as f:
         json.dump(books, f, indent=4)
 
+def get_next_id(books: List[dict]) -> int:
+    """Generate the next ID for a new book."""
+    if books:
+        return max(book["id"] for book in books) + 1
+    return 1
+
 # ---------------------------
 # JSON API Endpoints
 # ---------------------------
@@ -53,11 +59,7 @@ def create_book_api(book: Book):
     Create a new book record via JSON API.
     """
     books = read_books_file()
-
-    # Check if a book with the same id already exists
-    if any(existing_book["id"] == book.id for existing_book in books):
-        raise HTTPException(status_code=400, detail="Book with this id already exists.")
-
+    book.id = get_next_id(books)
     books.append(book.dict())
     write_books_file(books)
     return book
@@ -101,7 +103,6 @@ def add_book_page(request: Request):
 @app.post("/add")
 def add_book(
     request: Request,
-    id: int = Form(...),
     book_name: str = Form(...),
     year: int = Form(...),
     the_author: str = Form(...)
@@ -110,15 +111,12 @@ def add_book(
     Process the form data and add a new book.
     """
     books = read_books_file()
-
-    # Check if a book with the same id already exists
-    if any(existing_book["id"] == id for existing_book in books):
-        return templates.TemplateResponse(
-            "add_book.html",
-            {"request": request, "error": "Book with this id already exists."}
-        )
-
-    new_book = {"id": id, "book_name": book_name, "year": year, "the_author": the_author}
+    new_book = {
+        "id": get_next_id(books),
+        "book_name": book_name,
+        "year": year,
+        "the_author": the_author
+    }
     books.append(new_book)
     write_books_file(books)