Add view for consuming new batch ID; misc. tweaks for grids etc.

tailbone/grids/core.py

@@ -26,6 +26,7 @@ Core Grid Classes
 
 from __future__ import unicode_literals, absolute_import
 
+import datetime
 import urllib
 
 import six
@@ -34,7 +35,7 @@ from sqlalchemy import orm
 
 from rattail.db import api
 from rattail.db.types import GPCType
-from rattail.util import pretty_boolean, pretty_quantity, prettify
+from rattail.util import prettify, pretty_boolean, pretty_quantity, pretty_hours
 
 import webhelpers2_grid
 from pyramid.renderers import render
@@ -149,6 +150,8 @@ class Grid(object):
             self.set_renderer(key, self.render_percent)
         elif type_ == 'quantity':
             self.set_renderer(key, self.render_quantity)
+        elif type_ == 'duration':
+            self.set_renderer(key, self.render_duration)
         else:
             raise ValueError("Unsupported type for column '{}': {}".format(key, type_))
 
@@ -211,6 +214,12 @@ class Grid(object):
         value = self.obtain_value(obj, column_name)
         return pretty_quantity(value)
 
+    def render_duration(self, obj, column_name):
+        value = self.obtain_value(obj, column_name)
+        if value is None:
+            return ""
+        return pretty_hours(datetime.timedelta(seconds=value))
+
     def set_url(self, url):
         self.url = url