Add initial versioning support with SQLAlchemy-Continuum.

tailbone/views/products.py

@@ -56,6 +56,7 @@ from rattail.pod import get_image_url, get_image_path
 from ..db import Session
 from ..forms import GPCFieldRenderer, BrandFieldRenderer, PriceFieldRenderer
 from . import CrudView
+from .continuum import VersionView, version_defaults
 from ..progress import SessionProgress
 
 
@@ -237,9 +238,16 @@ class ProductsGrid(SearchableAlchemyGridView):
 
 
 class ProductCrud(CrudView):
-
+    """
+    Product CRUD view class.
+    """
     mapped_class = Product
     home_route = 'products'
+    child_version_classes = [
+        (model.ProductCode, 'product_uuid'),
+        (model.ProductCost, 'product_uuid'),
+        (model.ProductPrice, 'product_uuid'),
+        ]
 
     def get_model(self, key):
         model = super(ProductCrud, self).get_model(key)
@@ -277,7 +285,8 @@ class ProductCrud(CrudView):
         return fs
 
     def template_kwargs(self, form):
-        kwargs = {'image': False}
+        kwargs = super(ProductCrud, self).template_kwargs(form)
+        kwargs['image'] = False
         product = form.fieldset.model
         if product.upc:
             kwargs['image_url'] = get_image_url(
@@ -289,6 +298,19 @@ class ProductCrud(CrudView):
         return kwargs
 
 
+class ProductVersionView(VersionView):
+    """
+    View which shows version history for a product.
+    """
+    parent_class = model.Product
+    route_model_view = 'product.read'
+    child_classes = [
+        (model.ProductCode, 'product_uuid'),
+        (model.ProductCost, 'product_uuid'),
+        (model.ProductPrice, 'product_uuid'),
+        ]
+
+
 def products_search(request):
     """
     Locate a product(s) by UPC.
@@ -443,3 +465,5 @@ def includeme(config):
                     permission='products.delete')
     config.add_view(products_search, route_name='products.search',
                     renderer='json', permission='products.list')
+
+    version_defaults(config, ProductVersionView, 'product')