Expose per-item discounts for Trainwreck

tailbone/templates/trainwreck/transactions/view_row.mako

@@ -0,0 +1,16 @@
+## -*- coding: utf-8; -*-
+<%inherit file="/master/view_row.mako" />
+
+<%def name="modify_this_page_vars()">
+  ${parent.modify_this_page_vars()}
+  <script type="text/javascript">
+
+    % if discounts_data is not Undefined:
+        ${form.component_studly}Data.discountsData = ${json.dumps(discounts_data)|n}
+    % endif
+
+  </script>
+</%def>
+
+
+${parent.body()}

tailbone/views/trainwreck/base.py

@@ -30,6 +30,8 @@ import six
 
 from rattail.time import localtime
 
+from webhelpers2.html import HTML
+
 from tailbone.db import Session, TrainwreckSession, ExtraTrainwreckSessions
 from tailbone.views import MasterView
 
@@ -136,9 +138,13 @@ class TransactionView(MasterView):
         'description',
         'unit_quantity',
         'subtotal',
+        'discounts',
+        'discounted_subtotal',
         'tax',
         'total',
         'exempt_from_gross_sales',
+        'net_sales',
+        'gross_sales',
         'void',
     ]
 
@@ -231,6 +237,46 @@ class TransactionView(MasterView):
         f.set_type('tax', 'currency')
         f.set_type('total', 'currency')
 
+        # discounts
+        f.set_renderer('discounts', self.render_discounts)
+
+    def render_discounts(self, item, field):
+        if not item.discounts:
+            return
+
+        route_prefix = self.get_route_prefix()
+        factory = self.get_grid_factory()
+        use_buefy = self.get_use_buefy()
+
+        g = factory(
+            key='{}.discounts'.format(route_prefix),
+            data=[] if use_buefy else item.discounts,
+            columns=['description', 'amount'],
+            request=self.request)
+
+        if use_buefy:
+            return HTML.literal(
+                g.render_buefy_table_element(data_prop='discountsData'))
+        else:
+            g.set_type('amount', 'currency')
+            return HTML.literal(g.render_grid())
+
+    def template_kwargs_view_row(self, **kwargs):
+        use_buefy = self.get_use_buefy()
+        if use_buefy:
+
+            app = self.get_rattail_app()
+            item = kwargs['instance']
+            discounts_data = []
+            for discount in item.discounts:
+                discounts_data.append({
+                    'description': discount.description,
+                    'amount': app.render_currency(discount.amount),
+                })
+            kwargs['discounts_data'] = discounts_data
+
+        return kwargs
+
     def rollover(self):
         """
         View for performing yearly rollover functions.