Handle books without title, authors, isbn

lib/books.ts

@@ -7,7 +7,7 @@ export async function getAllBooks() {
 
   const books = new Promise<SimpleBook[]>((resolve, reject) => {
     database.all(
-      "SELECT title, authors, isbn FROM books",
+      "SELECT id, title, authors, isbn FROM books WHERE deleted = 0",
       (error: Error | null, rows: SimpleBook[]) => {
         if (error) {
           reject(error);
@@ -23,7 +23,8 @@ export async function getAllBooks() {
 }
 
 export interface SimpleBook {
-  authors: string;
-  isbn: string;
-  title: string;
+  id: number;
+  title: string | null;
+  authors: string | null;
+  isbn: string | null;
 }

pages/index.tsx

@@ -4,15 +4,15 @@ import { getAllBooks, SimpleBook } from "../lib/books";
 
 export default function Home(props: Props) {
   return (
-    <ol>
+    <ul>
       {props.books.map((book, idx) => {
         return (
-          <li key={`${idx}_${book.isbn}`}>
-            {book.title}; {book.authors}; {book.isbn}
+          <li key={`${idx}_${book.isbn ?? ""}`}>
+            {book.id}; {book.title}; {book.authors}; {book.isbn}
           </li>
         );
       })}
-    </ol>
+    </ul>
   );
 }