Add prev/next buttons when viewing upgrade details

tailbone/views/master.py

@@ -75,6 +75,7 @@ class MasterView(View):
     executable = False
     execute_progress_template = None
     execute_progress_initial_msg = None
+    supports_prev_next = False
 
     supports_mobile = False
     mobile_creatable = False

tailbone/views/upgrades.py

@@ -56,6 +56,7 @@ class UpgradeView(MasterView):
     executable = True
     execute_progress_template = '/upgrade.mako'
     execute_progress_initial_msg = "Upgrading"
+    supports_prev_next = True
 
     labels = {
         'executed_by': "Executed by",
@@ -127,6 +128,18 @@ class UpgradeView(MasterView):
         if upgrade.status_code == self.enum.UPGRADE_STATUS_EXECUTING:
             return 'notice'
 
+    def template_kwargs_view(self, **kwargs):
+        upgrade = kwargs['instance']
+        upgrades = self.Session.query(model.Upgrade)\
+                               .filter(model.Upgrade.uuid != upgrade.uuid)
+        kwargs['prev_instance'] = upgrades.filter(model.Upgrade.created <= upgrade.created)\
+                                          .order_by(model.Upgrade.created.desc())\
+                                          .first()
+        kwargs['next_instance'] = upgrades.filter(model.Upgrade.created >= upgrade.created)\
+                                          .order_by(model.Upgrade.created)\
+                                          .first()
+        return kwargs
+
     def configure_form(self, f):
         super(UpgradeView, self).configure_form(f)
         f.set_enum('status_code', self.enum.UPGRADE_STATUS)