Error handling for queries.

pages/api/website/[id]/metrics.js

@@ -3,11 +3,14 @@ import { ok } from 'lib/response';
 
 export default async (req, res) => {
   const { id, start_at, end_at } = req.query;
+  const websiteId = +id;
+  const startDate = new Date(+start_at);
+  const endDate = new Date(+end_at);
 
-  const metrics = await getMetrics(+id, new Date(+start_at), new Date(+end_at));
+  const metrics = await getMetrics(websiteId, startDate, endDate);
 
   const stats = Object.keys(metrics[0]).reduce((obj, key) => {
-    obj[key] = +metrics[0][key];
+    obj[key] = Number(metrics[0][key]) || 0;
     return obj;
   }, {});