Fix error when user accesses vm details and no invoices

hosting/templates/hosting/virtual_machine_detail.html

@@ -46,7 +46,7 @@
 				<div class="vm-vmid">
 					<div class="vm-item-subtitle">{% trans "Current Pricing" %}</div>
 					<div class="vm-item-lg">{{order.price|floatformat:2|intcomma}} CHF/{% if order.generic_product %}{% trans order.generic_product.product_subscription_interval %}{% else %}{% trans "Month" %}{% endif %}</div>
-					<a class="btn btn-vm-invoice" href="{{inv_url}}" target="_blank">{% trans "See Invoice" %}</a>
+					{% if inv_url %}<a class="btn btn-vm-invoice" href="{{inv_url}}" target="_blank">{% trans "See Invoice" %}</a>{%else%}{% trans "No invoice as of now" %}{% endif %}
 				</div>
 			</div>
 			<div class="vm-detail-item">

hosting/views.py

@@ -1694,7 +1694,11 @@ class VirtualMachineView(LoginRequiredMixin, View):
     login_url = reverse_lazy('hosting:login')
 
     def get_object(self):
-        owner = self.request.user
+        username = self.request.GET.get('username')
+        if self.request.user.is_admin and username:
+            owner = CustomUser.objects.get(username=username)
+        else:
+            owner = self.request.user
         vm = None
         manager = OpenNebulaManager(
             email=owner.username,
@@ -1750,7 +1754,10 @@ class VirtualMachineView(LoginRequiredMixin, View):
                    subscription=hosting_order.subscription_id,
                    count=1
                 )
-                inv_url = stripe_obj.data[0].hosted_invoice_url
+                if stripe_obj.data:
+                    inv_url = stripe_obj.data[0].hosted_invoice_url
+                else:
+                    inv_url = ''
             elif hosting_order.stripe_charge_id:
                 stripe_obj = stripe.Charge.retrieve(
                     hosting_order.stripe_charge_id