Improve UPC search for rows within batches.

As with the products page, now this search works with or without the check
digit.

tailbone/views/batches/rows.py

@@ -33,7 +33,9 @@ from tailbone.forms import GPCFieldRenderer
 from tailbone.grids.search import BooleanSearchFilter
 from tailbone.db import Session
 
+from rattail.db import model
 from rattail.db.model import Batch, LabelProfile
+from rattail.gpc import GPC
 
 
 def field_with_renderer(field, column):
@@ -62,9 +64,34 @@ def BatchRowsGrid(request):
         sort = 'ordinal'
 
         def filter_map(self):
+
+            # TODO: This code is copied from `tailbone.views.products`, which
+            # means we probably should refactor...
+
+            def filter_F01_is(q, v):
+                if not v:
+                    return q
+                try:
+                    return q.filter(model.Product.upc.in_((
+                                GPC(v), GPC(v, calc_check_digit='upc'))))
+                except ValueError:
+                    return q
+
+            def filter_F01_not(q, v):
+                if not v:
+                    return q
+                try:
+                    return q.filter(~model.Product.upc.in_((
+                                GPC(v), GPC(v, calc_check_digit='upc'))))
+                except ValueError:
+                    return q
+
             fmap = self.make_filter_map()
             for column in batch.columns:
-                if column.visible:
+                if column.sil_name == 'F01':
+                    fmap[column.name] = {'is': filter_F01_is,
+                                         'nt': filter_F01_not}
+                elif column.visible:
                     if column.data_type.startswith('CHAR'):
                         fmap[column.name] = self.filter_ilike(
                             getattr(batch.rowclass, column.name))