Add support for 'department' field in purchases / batches

Also fix logic for deleting a purchase (delete its batches first)

tailbone/forms/renderers/__init__.py

@@ -43,8 +43,8 @@ from .users import UserFieldRenderer, PermissionsFieldRenderer
 
 from .employees import EmployeeFieldRenderer
 
-from .products import (ProductFieldRenderer, GPCFieldRenderer, BrandFieldRenderer,
-                       PriceFieldRenderer, PriceWithExpirationFieldRenderer)
+from .products import (GPCFieldRenderer, DepartmentFieldRenderer, BrandFieldRenderer,
+                       ProductFieldRenderer, PriceFieldRenderer, PriceWithExpirationFieldRenderer)
 
 from .stores import StoreFieldRenderer
 

tailbone/forms/renderers/products.py

@@ -83,11 +83,16 @@ class DepartmentFieldRenderer(SelectFieldRenderer):
     """
     Shows the department number as well as the name.
     """
+
     def render_readonly(self, **kwargs):
-        dept = self.raw_value
-        if dept:
-            return "{0} - {1}".format(dept.number, dept.name)
-        return ""
+        department = self.raw_value
+        if not department:
+            return ''
+        if department.number:
+            text = '{} {}'.format(department.number, department.name)
+        else:
+            text = department.name
+        return tags.link_to(text, self.request.route_url('departments.view', uuid=department.uuid))
 
 
 class SubdepartmentFieldRenderer(SelectFieldRenderer):