Improved error msg handling

Author: rsriniva

contacts/db/config.js

@@ -5,6 +5,6 @@ const { Pool } = require('pg');
 const pgconn = new Pool({
     connectionString: DB_CONFIG,
     ssl: false,
-})
+});
 
 module.exports = { pgconn }

contacts/routes/index.js

@@ -6,11 +6,14 @@ const { pgconn } = require('../db/config')
 router.get('/', function(req, res) {
   pgconn.query('SELECT * FROM contacts', function(err,results) {
     if (err) {
-      throw err
+      console.log(err);
+      res.render('index', { error: 'Database connection failure! '+err.stack, contacts: null, title: 'Contact List' });
+    }
+    else {
+      let contacts = results.rows;
+      console.log(contacts);
+      res.render('index', { error: null, contacts: contacts, title: 'Contact List' });
     }
-    let contacts = results.rows;
-    console.log(contacts);
-    res.render('index', { contacts: contacts, title: 'Contact List' });
   })
 });
 

contacts/views/index.pug

@@ -6,22 +6,25 @@ block content
       h1= title
       hr
       br
-      table.table.table-striped.table-bordered.table-hover
-        if contacts
-          thead
-            tr
-              th ID
-              th First Name
-              th Last Name
-              th EMail
-          tbody
-            for contact in contacts
+      if error
+        .alert.alert-danger #{error}
+      else
+        table.table.table-striped.table-bordered.table-hover
+          if contacts
+            thead
               tr
-                td= contact.id
-                td= contact.firstname
-                td= contact.lastname
-                td= contact.email
-        else
-            tr
-              td
-                | No contacts found
+                th ID
+                th First Name
+                th Last Name
+                th EMail
+            tbody
+              for contact in contacts
+                tr
+                  td= contact.id
+                  td= contact.firstname
+                  td= contact.lastname
+                  td= contact.email
+          else
+              tr
+                td
+                  | No contacts found