def new_review(book_id, title, content):
book = Book.from_mongo(book_id)
book.new_review(title=title, content=content)
def book_reviews(book_id):
book = Book.from_mongo(book_id)
reviews = book.get_reviews()
return render_template('reviews.html', reviews=reviews, book_name=book.book_name, book_id=book._id)