Add Filter Action to Instance Views

The Instances page in both admin section and project
section doesn't support the filter action yet. This
feature is however implemented for the Projects page
and Users page. So added this feature to the Instances
page.

Fixes bug #1169084

Change-Id: I76e77a61f032e96f2d8d69a22d2caab2108c2aa8

openstack_dashboard/dashboards/project/instances/tables.py

@@ -439,6 +439,14 @@ TASK_DISPLAY_CHOICES = (
 )
 
 
+class InstancesFilterAction(tables.FilterAction):
+    def filter(self, table, instances, filter_string):
+        """ Naive case-insensitive search. """
+        q = filter_string.lower()
+        return [instance for instance in instances
+                if q in instance.name.lower()]
+
+
 class InstancesTable(tables.DataTable):
     TASK_STATUS_CHOICES = (
         (None, True),
@@ -480,7 +488,7 @@ class InstancesTable(tables.DataTable):
         verbose_name = _("Instances")
         status_columns = ["status", "task"]
         row_class = UpdateRow
-        table_actions = (LaunchLink, TerminateInstance)
+        table_actions = (LaunchLink, TerminateInstance, InstancesFilterAction)
         row_actions = (ConfirmResize, RevertResize, CreateSnapshot,
                        SimpleAssociateIP, AssociateIP,
                        SimpleDisassociateIP, EditInstance,