Added support for product codes.

These are shown when viewing a product, and may be used to locate a product via
search filters.

rattail/pyramid/templates/products/read.mako

@@ -4,6 +4,28 @@ ${parent.body()}
 
 <% product = form.fieldset.model %>
 
+<div id="product-codes">
+  <h2>Product Codes:</h2>
+  % if product.codes:
+      <div class="grid hoverable">
+        <table>
+          <thead>
+            <th>Code</th>
+          </thead>
+          <tbody>
+            % for i, code in enumerate(product.codes, 1):
+                <tr class="${'odd' if i % 2 else 'even'}">
+                  <td>${code}</td>
+                </tr>
+            % endfor
+          </tbody>
+        </table>
+      </div>
+  % else:
+      <p>None on file.</p>
+  % endif
+</div>
+
 <div id="product-costs">
   <h2>Product Costs:</h2>
   % if product.costs:

rattail/pyramid/views/products.py

@@ -44,7 +44,7 @@ from rattail import sil
 from rattail import batches
 from rattail.threads import Thread
 from rattail.exceptions import LabelPrintingError
-from rattail.db.model import ProductPrice
+from rattail.db.model import ProductPrice, ProductCode
 
 from rattail.pyramid import Session
 from rattail.pyramid.forms import (AutocompleteFieldRenderer,
@@ -87,6 +87,8 @@ class ProductsGrid(SearchableAlchemyGridView):
                                       rattail.ProductPrice.uuid == rattail.Product.current_price_uuid),
             'vendor':
                 join_vendor,
+            'code':
+                lambda q: q.outerjoin(ProductCode),
             }
 
     def filter_map(self):
@@ -117,7 +119,8 @@ class ProductsGrid(SearchableAlchemyGridView):
             brand=self.filter_ilike(rattail.Brand.name),
             department=self.filter_ilike(rattail.Department.name),
             subdepartment=self.filter_ilike(rattail.Subdepartment.name),
-            vendor=self.filter_ilike(rattail.Vendor.name))
+            vendor=self.filter_ilike(rattail.Vendor.name),
+            code=self.filter_ilike(ProductCode.code))
 
     def filter_config(self):
         return self.make_filter_config(