Avoid error when editing a department

just a temp hack, need to fix proper yet

tailbone/views/departments.py

@@ -24,7 +24,7 @@
 Department Views
 """
 
-from rattail.db import model
+from rattail.db.model import Department, Product
 
 from webhelpers2.html import HTML
 
@@ -35,7 +35,7 @@ class DepartmentView(MasterView):
     """
     Master view for the Department class.
     """
-    model_class = model.Department
+    model_class = Department
     touchable = True
     has_versions = True
     results_downloadable = True
@@ -64,7 +64,7 @@ class DepartmentView(MasterView):
     ]
 
     has_rows = True
-    model_row_class = model.Product
+    model_row_class = Product
     rows_title = "Products"
 
     row_labels = {
@@ -111,6 +111,8 @@ class DepartmentView(MasterView):
 
         # tax
         f.set_renderer('tax', self.render_tax)
+        # TODO: make this editable
+        f.set_readonly('tax')
 
     def render_employees(self, department, field):
         route_prefix = self.get_route_prefix()
@@ -160,6 +162,7 @@ class DepartmentView(MasterView):
         Check to see if there are any products which belong to the department;
         if there are then we do not allow delete and redirect the user.
         """
+        model = self.model
         count = self.Session.query(model.Product)\
                             .filter(model.Product.department == department)\
                             .count()
@@ -169,6 +172,7 @@ class DepartmentView(MasterView):
             raise self.redirect(self.get_action_url('view', department))
 
     def get_row_data(self, department):
+        model = self.model
         return self.Session.query(model.Product)\
                            .filter(model.Product.department == department)
 
@@ -198,6 +202,7 @@ class DepartmentView(MasterView):
         """
         View list of departments by vendor
         """
+        model = self.model
         data = self.Session.query(model.Department)\
                            .outerjoin(model.Product)\
                            .join(model.ProductCost)\