Chapter 13 - Handle generic errors

app/dashboard/invoices/error.tsx

@@ -0,0 +1,31 @@
+'use client';
+
+import { useEffect } from 'react';
+
+export default function Error({
+                                  error,
+                                  reset,
+                              }: {
+    error: Error & { digest?: string };
+    reset: () => void;
+}) {
+    useEffect(() => {
+        // Optionally log the error to an error reporting service
+        console.error(error);
+    }, [error]);
+
+    return (
+        <main className="flex h-full flex-col items-center justify-center">
+            <h2 className="text-center">Something went wrong!</h2>
+            <button
+                className="mt-4 rounded-md bg-blue-500 px-4 py-2 text-sm text-white transition-colors hover:bg-blue-400"
+                onClick={
+                    // Attempt to recover by trying to re-render the invoices route
+                    () => reset()
+                }
+            >
+                Try again
+            </button>
+        </main>
+    );
+}

app/lib/actions.ts

@@ -28,10 +28,16 @@ export async function createInvoice(formData: FormData) {
     const amountInCents = amount * 100;
     const date = new Date().toISOString().split('T')[0];
 
-    await sql`
-    INSERT INTO invoices (customer_id, amount, status, date)
-    VALUES (${customerId}, ${amountInCents}, ${status}, ${date})
-  `;
+    try {
+        await sql`
+      INSERT INTO invoices (customer_id, amount, status, date)
+      VALUES (${customerId}, ${amountInCents}, ${status}, ${date})
+    `;
+    } catch (error) {
+        return {
+            message: 'Database Error: Failed to Create Invoice.',
+        };
+    }
 
     revalidatePath('/dashboard/invoices');
     redirect('/dashboard/invoices');
@@ -47,17 +53,27 @@ export async function updateInvoice(id: string, formData: FormData) {
 
     const amountInCents = amount * 100;
 
-    await sql`
-    UPDATE invoices
-    SET customer_id = ${customerId}, amount = ${amountInCents}, status = ${status}
-    WHERE id = ${id}
-  `;
+    try {
+        await sql`
+        UPDATE invoices
+        SET customer_id = ${customerId}, amount = ${amountInCents}, status = ${status}
+        WHERE id = ${id}
+      `;
+    } catch (error) {
+        return { message: 'Database Error: Failed to Update Invoice.' };
+    }
 
     revalidatePath('/dashboard/invoices');
     redirect('/dashboard/invoices');
 }
 
 export async function deleteInvoice(id: string) {
-    await sql`DELETE FROM invoices WHERE id = ${id}`;
-    revalidatePath('/dashboard/invoices');
+    throw new Error('Failed to Delete Invoice');
+    try {
+        await sql`DELETE FROM invoices WHERE id = ${id}`;
+        revalidatePath('/dashboard/invoices');
+        return { message: 'Deleted Invoice.' };
+    } catch (error) {
+        return { message: 'Database Error: Failed to Delete Invoice.' };
+    }
 }